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_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:33:05,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:33:05,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:33:05,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:33:05,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:33:05,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:33:05,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:33:05,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:33:05,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:33:05,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:33:05,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:33:05,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:33:05,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:33:05,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:33:05,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:33:05,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:33:05,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:33:05,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:33:05,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:33:05,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:33:05,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:33:05,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:33:05,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:33:05,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:33:05,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:33:05,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:33:05,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:33:05,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:33:05,890 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 09:33:05,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:33:05,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:33:05,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:33:05,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:33:05,906 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:33:05,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:33:05,906 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:33:05,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:33:05,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:33:05,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:33:05,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:33:05,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:33:05,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:33:05,907 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:33:05,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:33:05,908 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:33:05,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:33:05,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:33:05,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:33:05,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:33:05,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:33:05,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:33:05,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:33:05,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:33:05,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:33:05,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:33:05,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:33:05,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:33:05,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:33:05,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:33:05,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:33:05,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:33:05,955 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:33:05,955 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:33:05,956 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-09-07 09:33:06,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb72460a3/2db0e1736abb4ab28b710f2c6f111657/FLAGa12cac2bf [2019-09-07 09:33:06,435 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:33:06,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-09-07 09:33:06,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb72460a3/2db0e1736abb4ab28b710f2c6f111657/FLAGa12cac2bf [2019-09-07 09:33:06,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb72460a3/2db0e1736abb4ab28b710f2c6f111657 [2019-09-07 09:33:06,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:33:06,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:33:06,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:33:06,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:33:06,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:33:06,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:33:06" (1/1) ... [2019-09-07 09:33:06,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2090631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:06, skipping insertion in model container [2019-09-07 09:33:06,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:33:06" (1/1) ... [2019-09-07 09:33:06,860 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:33:06,878 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:33:07,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:33:07,096 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:33:07,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:33:07,141 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:33:07,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07 WrapperNode [2019-09-07 09:33:07,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:33:07,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:33:07,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:33:07,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:33:07,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... [2019-09-07 09:33:07,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:33:07,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:33:07,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:33:07,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:33:07,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:33:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:33:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:33:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:33:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:33:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:33:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:33:07,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:33:07,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:33:07,619 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:33:07,619 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-07 09:33:07,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:33:07 BoogieIcfgContainer [2019-09-07 09:33:07,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:33:07,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:33:07,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:33:07,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:33:07,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:33:06" (1/3) ... [2019-09-07 09:33:07,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769c9ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:33:07, skipping insertion in model container [2019-09-07 09:33:07,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:33:07" (2/3) ... [2019-09-07 09:33:07,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769c9ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:33:07, skipping insertion in model container [2019-09-07 09:33:07,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:33:07" (3/3) ... [2019-09-07 09:33:07,628 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2019-09-07 09:33:07,635 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:33:07,643 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:33:07,659 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:33:07,688 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:33:07,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:33:07,689 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:33:07,689 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:33:07,689 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:33:07,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:33:07,690 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:33:07,690 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:33:07,690 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:33:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-07 09:33:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:33:07,711 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:07,712 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:07,713 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2019-09-07 09:33:07,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:07,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:07,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:07,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:07,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:07,863 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 09:33:07,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:33:07,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:33:07,868 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:33:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:33:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:33:07,881 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-09-07 09:33:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:07,915 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-09-07 09:33:07,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:33:07,917 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-07 09:33:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:07,928 INFO L225 Difference]: With dead ends: 58 [2019-09-07 09:33:07,928 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 09:33:07,936 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 09:33:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 09:33:07,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-07 09:33:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 09:33:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 09:33:07,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-09-07 09:33:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:07,995 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 09:33:07,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:33:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 09:33:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:33:07,997 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:07,998 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:07,999 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:08,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2019-09-07 09:33:08,001 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:08,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:08,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:08,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:08,121 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 09:33:08,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:33:08,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:33:08,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:33:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:33:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:33:08,124 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 09:33:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:08,167 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-09-07 09:33:08,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:33:08,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-07 09:33:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:08,169 INFO L225 Difference]: With dead ends: 50 [2019-09-07 09:33:08,169 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 09:33:08,170 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 09:33:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 09:33:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 09:33:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 09:33:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 09:33:08,177 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2019-09-07 09:33:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:08,177 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 09:33:08,178 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:33:08,178 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 09:33:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 09:33:08,179 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:08,179 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] [2019-09-07 09:33:08,179 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1258945684, now seen corresponding path program 1 times [2019-09-07 09:33:08,180 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:08,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:08,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:08,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:33:08,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:33:08,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:33:08,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:33:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:33:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:33:08,235 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2019-09-07 09:33:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:08,306 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2019-09-07 09:33:08,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:33:08,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-09-07 09:33:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:08,308 INFO L225 Difference]: With dead ends: 52 [2019-09-07 09:33:08,308 INFO L226 Difference]: Without dead ends: 35 [2019-09-07 09:33:08,309 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 09:33:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-07 09:33:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-09-07 09:33:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 09:33:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-09-07 09:33:08,321 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2019-09-07 09:33:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:08,322 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-09-07 09:33:08,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:33:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-09-07 09:33:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:33:08,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:08,325 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, 1, 1, 1, 1, 1] [2019-09-07 09:33:08,326 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2019-09-07 09:33:08,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:08,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:08,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:08,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-07 09:33:08,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:08,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:33:08,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:08,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:33:08,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-07 09:33:08,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:08,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:33:08,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:33:08,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:33:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:33:08,524 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2019-09-07 09:33:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:08,571 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-09-07 09:33:08,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:33:08,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-09-07 09:33:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:08,573 INFO L225 Difference]: With dead ends: 58 [2019-09-07 09:33:08,573 INFO L226 Difference]: Without dead ends: 35 [2019-09-07 09:33:08,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 09:33:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-07 09:33:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-07 09:33:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 09:33:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-09-07 09:33:08,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2019-09-07 09:33:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:08,580 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-09-07 09:33:08,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:33:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-09-07 09:33:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:33:08,582 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:08,582 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:08,582 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1956939620, now seen corresponding path program 2 times [2019-09-07 09:33:08,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:08,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:08,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:08,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 09:33:08,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:08,661 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) [2019-09-07 09:33:08,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:08,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:33:08,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:08,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:33:08,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 09:33:08,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:08,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:33:08,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:33:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:33:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:33:08,753 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2019-09-07 09:33:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:08,815 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2019-09-07 09:33:08,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:33:08,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-09-07 09:33:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:08,818 INFO L225 Difference]: With dead ends: 62 [2019-09-07 09:33:08,818 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:33:08,819 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:33:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:33:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-07 09:33:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:33:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-09-07 09:33:08,826 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2019-09-07 09:33:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:08,826 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-09-07 09:33:08,827 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:33:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-09-07 09:33:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 09:33:08,828 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:08,828 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:08,828 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:08,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1423302462, now seen corresponding path program 3 times [2019-09-07 09:33:08,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:08,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:08,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:08,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:33:08,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:08,948 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 09:33:08,974 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 09:33:09,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:33:09,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:09,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:33:09,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:33:09,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:09,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:33:09,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:33:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:33:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:33:09,062 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2019-09-07 09:33:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:09,195 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2019-09-07 09:33:09,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:33:09,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-09-07 09:33:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:09,199 INFO L225 Difference]: With dead ends: 81 [2019-09-07 09:33:09,199 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 09:33:09,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:33:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 09:33:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2019-09-07 09:33:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 09:33:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-07 09:33:09,215 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 35 [2019-09-07 09:33:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:09,215 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-07 09:33:09,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:33:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-07 09:33:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 09:33:09,217 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:09,219 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:09,220 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:09,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1938764086, now seen corresponding path program 4 times [2019-09-07 09:33:09,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:09,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:09,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:09,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:09,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-07 09:33:09,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:09,324 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:09,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:33:09,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:33:09,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:09,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:33:09,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-07 09:33:09,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:09,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:33:09,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:33:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:33:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:33:09,409 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 7 states. [2019-09-07 09:33:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:09,450 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-09-07 09:33:09,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:33:09,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-09-07 09:33:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:09,453 INFO L225 Difference]: With dead ends: 86 [2019-09-07 09:33:09,454 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 09:33:09,454 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 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 09:33:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 09:33:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-07 09:33:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-07 09:33:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-09-07 09:33:09,462 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 43 [2019-09-07 09:33:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:09,464 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-09-07 09:33:09,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:33:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-09-07 09:33:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 09:33:09,466 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:09,466 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:09,466 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:09,467 INFO L82 PathProgramCache]: Analyzing trace with hash 849823572, now seen corresponding path program 5 times [2019-09-07 09:33:09,467 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:09,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:09,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:09,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:09,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 09:33:09,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:09,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:33:09,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:09,802 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:33:09,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:09,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:33:09,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 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 09:33:09,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:09,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:33:09,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:33:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:33:09,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:33:09,830 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2019-09-07 09:33:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:09,913 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2019-09-07 09:33:09,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:33:09,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-09-07 09:33:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:09,918 INFO L225 Difference]: With dead ends: 86 [2019-09-07 09:33:09,918 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 09:33:09,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 09:33:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 09:33:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-09-07 09:33:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 09:33:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-09-07 09:33:09,932 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 45 [2019-09-07 09:33:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:09,936 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-09-07 09:33:09,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:33:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-09-07 09:33:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 09:33:09,937 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:09,938 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:09,939 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1545890606, now seen corresponding path program 6 times [2019-09-07 09:33:09,939 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:09,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:09,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:09,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:09,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-07 09:33:10,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:10,037 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:10,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:33:10,185 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:33:10,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:10,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:33:10,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-07 09:33:10,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:10,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:33:10,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:33:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:33:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:33:10,273 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 12 states. [2019-09-07 09:33:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:10,439 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2019-09-07 09:33:10,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:33:10,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-09-07 09:33:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:10,442 INFO L225 Difference]: With dead ends: 109 [2019-09-07 09:33:10,442 INFO L226 Difference]: Without dead ends: 68 [2019-09-07 09:33:10,445 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:33:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-07 09:33:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-09-07 09:33:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 09:33:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-09-07 09:33:10,463 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 51 [2019-09-07 09:33:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:10,464 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-09-07 09:33:10,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:33:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-09-07 09:33:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 09:33:10,466 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:10,466 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:10,466 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1518498522, now seen corresponding path program 7 times [2019-09-07 09:33:10,469 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:10,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:10,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:10,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:10,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-07 09:33:10,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:10,585 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) [2019-09-07 09:33:10,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:10,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:33:10,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-07 09:33:10,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:10,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:33:10,672 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:33:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:33:10,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:33:10,673 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 9 states. [2019-09-07 09:33:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:10,713 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2019-09-07 09:33:10,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:33:10,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-09-07 09:33:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:10,715 INFO L225 Difference]: With dead ends: 114 [2019-09-07 09:33:10,715 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 09:33:10,716 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 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 09:33:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 09:33:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-09-07 09:33:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 09:33:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-09-07 09:33:10,723 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2019-09-07 09:33:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:10,723 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-09-07 09:33:10,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:33:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-09-07 09:33:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:33:10,724 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:10,725 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:10,725 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1100064580, now seen corresponding path program 8 times [2019-09-07 09:33:10,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:10,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:10,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:10,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:10,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-09-07 09:33:10,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:10,804 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) [2019-09-07 09:33:10,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:10,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:33:10,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:10,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:33:10,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-07 09:33:10,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:10,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:33:10,959 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:33:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:33:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:33:10,960 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 15 states. [2019-09-07 09:33:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:11,121 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2019-09-07 09:33:11,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:33:11,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2019-09-07 09:33:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:11,123 INFO L225 Difference]: With dead ends: 125 [2019-09-07 09:33:11,123 INFO L226 Difference]: Without dead ends: 78 [2019-09-07 09:33:11,124 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:33:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-07 09:33:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2019-09-07 09:33:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-07 09:33:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2019-09-07 09:33:11,131 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 61 [2019-09-07 09:33:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:11,132 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2019-09-07 09:33:11,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:33:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2019-09-07 09:33:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 09:33:11,135 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:11,135 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:11,135 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1948142788, now seen corresponding path program 9 times [2019-09-07 09:33:11,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:11,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:11,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:11,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:11,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-07 09:33:11,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:11,235 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:11,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:33:11,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:33:11,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:11,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:33:11,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-09-07 09:33:11,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:11,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2019-09-07 09:33:11,801 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:33:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:33:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:33:11,802 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 12 states. [2019-09-07 09:33:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:11,936 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2019-09-07 09:33:11,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:33:11,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2019-09-07 09:33:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:11,938 INFO L225 Difference]: With dead ends: 125 [2019-09-07 09:33:11,939 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 09:33:11,939 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 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 09:33:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 09:33:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-07 09:33:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 09:33:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-09-07 09:33:11,946 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 69 [2019-09-07 09:33:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:11,946 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-09-07 09:33:11,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:33:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-09-07 09:33:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 09:33:11,948 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:11,948 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:11,948 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash -256126096, now seen corresponding path program 10 times [2019-09-07 09:33:11,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:11,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:11,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-07 09:33:12,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:12,053 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 09:33:12,067 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 09:33:12,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:33:12,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:12,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:33:12,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:33:12,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:12,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-09-07 09:33:12,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:33:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:33:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:33:12,258 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 19 states. [2019-09-07 09:33:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:12,448 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2019-09-07 09:33:12,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:33:12,449 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-09-07 09:33:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:12,450 INFO L225 Difference]: With dead ends: 163 [2019-09-07 09:33:12,450 INFO L226 Difference]: Without dead ends: 98 [2019-09-07 09:33:12,451 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:33:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-07 09:33:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2019-09-07 09:33:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-07 09:33:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-09-07 09:33:12,458 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2019-09-07 09:33:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:12,458 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-09-07 09:33:12,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:33:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-09-07 09:33:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-07 09:33:12,459 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:12,460 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:12,460 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:12,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:12,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1643582312, now seen corresponding path program 11 times [2019-09-07 09:33:12,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:12,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:12,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:12,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:12,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-09-07 09:33:12,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:12,565 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:33:12,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:54,579 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 09:33:54,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:54,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:33:54,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-09-07 09:33:54,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:54,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:33:54,798 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:33:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:33:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:33:54,799 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 21 states. [2019-09-07 09:33:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:55,009 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2019-09-07 09:33:55,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:33:55,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2019-09-07 09:33:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:55,011 INFO L225 Difference]: With dead ends: 177 [2019-09-07 09:33:55,011 INFO L226 Difference]: Without dead ends: 106 [2019-09-07 09:33:55,012 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:33:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-07 09:33:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2019-09-07 09:33:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-07 09:33:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2019-09-07 09:33:55,019 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 89 [2019-09-07 09:33:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:55,020 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2019-09-07 09:33:55,020 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:33:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2019-09-07 09:33:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 09:33:55,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:55,021 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:55,021 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:55,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1994376352, now seen corresponding path program 12 times [2019-09-07 09:33:55,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:55,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:55,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:55,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:55,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-09-07 09:33:55,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:55,136 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) [2019-09-07 09:33:55,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:03,983 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 09:34:03,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:03,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:34:03,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-09-07 09:34:04,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:04,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 09:34:04,034 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:34:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:34:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:34:04,034 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 13 states. [2019-09-07 09:34:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:04,070 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2019-09-07 09:34:04,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:34:04,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2019-09-07 09:34:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:04,073 INFO L225 Difference]: With dead ends: 182 [2019-09-07 09:34:04,073 INFO L226 Difference]: Without dead ends: 105 [2019-09-07 09:34:04,074 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 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 09:34:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-07 09:34:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-09-07 09:34:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 09:34:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2019-09-07 09:34:04,080 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2019-09-07 09:34:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:04,080 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2019-09-07 09:34:04,080 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:34:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2019-09-07 09:34:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 09:34:04,082 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:04,082 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:04,082 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 493735678, now seen corresponding path program 13 times [2019-09-07 09:34:04,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:04,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:04,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:04,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:04,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-09-07 09:34:04,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:04,247 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 09:34:04,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:04,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:34:04,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-09-07 09:34:04,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:04,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:34:04,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:34:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:34:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:34:04,408 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 14 states. [2019-09-07 09:34:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:04,475 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2019-09-07 09:34:04,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:34:04,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2019-09-07 09:34:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:04,480 INFO L225 Difference]: With dead ends: 184 [2019-09-07 09:34:04,480 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 09:34:04,482 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 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 09:34:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 09:34:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-09-07 09:34:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 09:34:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2019-09-07 09:34:04,493 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2019-09-07 09:34:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:04,494 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2019-09-07 09:34:04,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:34:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2019-09-07 09:34:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 09:34:04,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:04,496 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:04,497 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -727387364, now seen corresponding path program 14 times [2019-09-07 09:34:04,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:04,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:04,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:04,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:04,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-09-07 09:34:04,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:04,719 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) [2019-09-07 09:34:04,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:04,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:34:04,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:04,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:34:04,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-09-07 09:34:04,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:04,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:34:04,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:34:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:34:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:34:04,998 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 25 states. [2019-09-07 09:34:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:05,195 INFO L93 Difference]: Finished difference Result 195 states and 206 transitions. [2019-09-07 09:34:05,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:34:05,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2019-09-07 09:34:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:05,197 INFO L225 Difference]: With dead ends: 195 [2019-09-07 09:34:05,197 INFO L226 Difference]: Without dead ends: 118 [2019-09-07 09:34:05,198 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:34:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-07 09:34:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2019-09-07 09:34:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-07 09:34:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-09-07 09:34:05,204 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 101 [2019-09-07 09:34:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:05,204 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-09-07 09:34:05,204 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:34:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-09-07 09:34:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-07 09:34:05,205 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:05,206 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:05,206 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:05,206 INFO L82 PathProgramCache]: Analyzing trace with hash -868317420, now seen corresponding path program 15 times [2019-09-07 09:34:05,207 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:05,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:05,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:05,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-09-07 09:34:05,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:05,373 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 09:34:05,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:34:27,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:34:27,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:27,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 09:34:27,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 21 proven. 121 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-09-07 09:34:27,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:27,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2019-09-07 09:34:27,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:34:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:34:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:34:27,503 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 17 states. [2019-09-07 09:34:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:27,711 INFO L93 Difference]: Finished difference Result 185 states and 197 transitions. [2019-09-07 09:34:27,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 09:34:27,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 109 [2019-09-07 09:34:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:27,712 INFO L225 Difference]: With dead ends: 185 [2019-09-07 09:34:27,712 INFO L226 Difference]: Without dead ends: 126 [2019-09-07 09:34:27,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:34:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-07 09:34:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-09-07 09:34:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 09:34:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-09-07 09:34:27,720 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 109 [2019-09-07 09:34:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:27,720 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-09-07 09:34:27,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:34:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-09-07 09:34:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 09:34:27,722 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:27,722 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:27,722 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 490677064, now seen corresponding path program 16 times [2019-09-07 09:34:27,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:27,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:27,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:27,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:27,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-09-07 09:34:27,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:27,878 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) [2019-09-07 09:34:27,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:27,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:34:27,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:27,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:34:27,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-09-07 09:34:27,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:27,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:34:27,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:34:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:34:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:34:27,997 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 16 states. [2019-09-07 09:34:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:28,072 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2019-09-07 09:34:28,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:34:28,073 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2019-09-07 09:34:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:28,074 INFO L225 Difference]: With dead ends: 224 [2019-09-07 09:34:28,075 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 09:34:28,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:34:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 09:34:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-09-07 09:34:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 09:34:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-09-07 09:34:28,083 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2019-09-07 09:34:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:28,084 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-09-07 09:34:28,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:34:28,084 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-09-07 09:34:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 09:34:28,085 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:28,085 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:28,086 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:28,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:28,086 INFO L82 PathProgramCache]: Analyzing trace with hash 747846886, now seen corresponding path program 17 times [2019-09-07 09:34:28,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:28,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:28,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:28,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:28,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-09-07 09:34:28,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:28,330 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) [2019-09-07 09:34:28,358 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:36:04,641 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 09:36:04,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:36:04,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:36:04,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-09-07 09:36:04,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:04,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-09-07 09:36:04,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:36:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:36:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:36:04,996 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 30 states. [2019-09-07 09:36:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:05,251 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2019-09-07 09:36:05,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 09:36:05,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2019-09-07 09:36:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:05,253 INFO L225 Difference]: With dead ends: 235 [2019-09-07 09:36:05,253 INFO L226 Difference]: Without dead ends: 140 [2019-09-07 09:36:05,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:36:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-07 09:36:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2019-09-07 09:36:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 09:36:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-09-07 09:36:05,261 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 123 [2019-09-07 09:36:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:05,261 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-09-07 09:36:05,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:36:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-09-07 09:36:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 09:36:05,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:05,263 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:05,263 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash -711489826, now seen corresponding path program 18 times [2019-09-07 09:36:05,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:05,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:05,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:05,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:05,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-09-07 09:36:05,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:05,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:36:05,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:36:57,066 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 09:36:57,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:36:57,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:36:57,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 196 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-09-07 09:36:57,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:57,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2019-09-07 09:36:57,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 09:36:57,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 09:36:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 09:36:57,425 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 36 states. [2019-09-07 09:36:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:58,240 INFO L93 Difference]: Finished difference Result 253 states and 268 transitions. [2019-09-07 09:36:58,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 09:36:58,241 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 131 [2019-09-07 09:36:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:58,241 INFO L225 Difference]: With dead ends: 253 [2019-09-07 09:36:58,242 INFO L226 Difference]: Without dead ends: 152 [2019-09-07 09:36:58,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 09:36:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-09-07 09:36:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2019-09-07 09:36:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-09-07 09:36:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2019-09-07 09:36:58,249 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 131 [2019-09-07 09:36:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:58,249 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2019-09-07 09:36:58,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 09:36:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2019-09-07 09:36:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-07 09:36:58,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:58,250 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:58,250 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1879298766, now seen corresponding path program 19 times [2019-09-07 09:36:58,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:58,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:58,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:58,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:58,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-07 09:36:58,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:58,489 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 09:36:58,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:36:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:58,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:36:58,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-07 09:36:58,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:58,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:36:58,598 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:36:58,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:36:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:36:58,599 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 20 states. [2019-09-07 09:36:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:58,661 INFO L93 Difference]: Finished difference Result 268 states and 276 transitions. [2019-09-07 09:36:58,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:36:58,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 147 [2019-09-07 09:36:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:58,665 INFO L225 Difference]: With dead ends: 268 [2019-09-07 09:36:58,665 INFO L226 Difference]: Without dead ends: 155 [2019-09-07 09:36:58,666 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 147 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 09:36:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-07 09:36:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-09-07 09:36:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-07 09:36:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2019-09-07 09:36:58,688 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 147 [2019-09-07 09:36:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:58,688 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2019-09-07 09:36:58,688 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:36:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2019-09-07 09:36:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-07 09:36:58,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:58,690 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:58,690 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1996291348, now seen corresponding path program 20 times [2019-09-07 09:36:58,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:58,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:58,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:58,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:36:58,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2019-09-07 09:36:58,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:58,896 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 09:36:58,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:36:58,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:36:58,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:36:58,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:36:58,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-07 09:36:59,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:59,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:36:59,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:36:59,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:36:59,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:36:59,292 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 37 states. [2019-09-07 09:36:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:59,669 INFO L93 Difference]: Finished difference Result 279 states and 290 transitions. [2019-09-07 09:36:59,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:36:59,669 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 149 [2019-09-07 09:36:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:59,671 INFO L225 Difference]: With dead ends: 279 [2019-09-07 09:36:59,671 INFO L226 Difference]: Without dead ends: 166 [2019-09-07 09:36:59,676 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:36:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-09-07 09:36:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2019-09-07 09:36:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-07 09:36:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-09-07 09:36:59,683 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 149 [2019-09-07 09:36:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:59,683 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-09-07 09:36:59,684 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:36:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-09-07 09:36:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-07 09:36:59,685 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:59,685 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:59,685 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1410336484, now seen corresponding path program 21 times [2019-09-07 09:36:59,686 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:59,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:59,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:59,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:59,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2019-09-07 09:36:59,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:59,963 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 09:36:59,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:38:21,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 09:38:21,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:38:21,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 09:38:21,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2019-09-07 09:38:21,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:21,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 23 [2019-09-07 09:38:21,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:38:21,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:38:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:38:21,971 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 23 states. [2019-09-07 09:38:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:22,521 INFO L93 Difference]: Finished difference Result 254 states and 263 transitions. [2019-09-07 09:38:22,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:38:22,522 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 157 [2019-09-07 09:38:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:22,523 INFO L225 Difference]: With dead ends: 254 [2019-09-07 09:38:22,523 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 09:38:22,526 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1046, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:38:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 09:38:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2019-09-07 09:38:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-09-07 09:38:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2019-09-07 09:38:22,541 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 157 [2019-09-07 09:38:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:22,546 INFO L475 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2019-09-07 09:38:22,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:38:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2019-09-07 09:38:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-07 09:38:22,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:22,548 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:22,550 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:22,551 INFO L82 PathProgramCache]: Analyzing trace with hash 318750398, now seen corresponding path program 22 times [2019-09-07 09:38:22,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:22,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:22,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:22,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:38:22,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-09-07 09:38:22,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:22,832 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:38:22,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:38:22,926 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:38:22,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:38:22,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:38:22,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-09-07 09:38:23,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:23,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2019-09-07 09:38:23,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-07 09:38:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-07 09:38:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2019-09-07 09:38:23,255 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 40 states. [2019-09-07 09:38:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:23,655 INFO L93 Difference]: Finished difference Result 305 states and 316 transitions. [2019-09-07 09:38:23,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-07 09:38:23,655 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 163 [2019-09-07 09:38:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:23,657 INFO L225 Difference]: With dead ends: 305 [2019-09-07 09:38:23,657 INFO L226 Difference]: Without dead ends: 180 [2019-09-07 09:38:23,658 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2019-09-07 09:38:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-07 09:38:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2019-09-07 09:38:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-09-07 09:38:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2019-09-07 09:38:23,664 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 163 [2019-09-07 09:38:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:23,665 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2019-09-07 09:38:23,665 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-07 09:38:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2019-09-07 09:38:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-09-07 09:38:23,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:23,666 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:23,667 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:23,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:23,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1815580854, now seen corresponding path program 23 times [2019-09-07 09:38:23,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:23,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:23,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:23,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:38:23,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2019-09-07 09:38:23,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:23,961 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 09:38:23,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:41:07,937 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 09:41:07,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:08,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:41:08,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2019-09-07 09:41:08,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:08,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2019-09-07 09:41:08,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 09:41:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 09:41:08,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:41:08,646 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 42 states. [2019-09-07 09:41:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:09,016 INFO L93 Difference]: Finished difference Result 319 states and 330 transitions. [2019-09-07 09:41:09,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-07 09:41:09,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 171 [2019-09-07 09:41:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:09,018 INFO L225 Difference]: With dead ends: 319 [2019-09-07 09:41:09,018 INFO L226 Difference]: Without dead ends: 188 [2019-09-07 09:41:09,019 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:41:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-09-07 09:41:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2019-09-07 09:41:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-09-07 09:41:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2019-09-07 09:41:09,030 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 171 [2019-09-07 09:41:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:09,031 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2019-09-07 09:41:09,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 09:41:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2019-09-07 09:41:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-07 09:41:09,032 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:09,033 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:09,033 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1379186002, now seen corresponding path program 24 times [2019-09-07 09:41:09,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:09,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:09,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:09,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:09,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-09-07 09:41:09,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:09,366 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 09:41:09,389 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 09:43:23,080 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 09:43:23,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:23,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:43:23,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-09-07 09:43:23,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:23,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2019-09-07 09:43:23,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 09:43:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 09:43:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 09:43:23,715 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 44 states. [2019-09-07 09:43:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:24,220 INFO L93 Difference]: Finished difference Result 333 states and 344 transitions. [2019-09-07 09:43:24,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 09:43:24,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2019-09-07 09:43:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:24,223 INFO L225 Difference]: With dead ends: 333 [2019-09-07 09:43:24,223 INFO L226 Difference]: Without dead ends: 196 [2019-09-07 09:43:24,224 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 09:43:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-07 09:43:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2019-09-07 09:43:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-09-07 09:43:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-09-07 09:43:24,235 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 179 [2019-09-07 09:43:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:24,236 INFO L475 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-09-07 09:43:24,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 09:43:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-09-07 09:43:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-09-07 09:43:24,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:24,238 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:24,239 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 245558438, now seen corresponding path program 25 times [2019-09-07 09:43:24,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:24,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:24,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:24,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:24,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-09-07 09:43:24,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:24,652 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) [2019-09-07 09:43:24,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:24,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:43:24,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-09-07 09:43:24,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:24,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:43:24,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:43:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:43:24,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:43:24,833 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 25 states. [2019-09-07 09:43:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:24,945 INFO L93 Difference]: Finished difference Result 338 states and 346 transitions. [2019-09-07 09:43:24,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:43:24,946 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 187 [2019-09-07 09:43:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:24,948 INFO L225 Difference]: With dead ends: 338 [2019-09-07 09:43:24,948 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 09:43:24,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 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 09:43:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 09:43:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-09-07 09:43:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 09:43:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-09-07 09:43:24,960 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 187 [2019-09-07 09:43:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:24,960 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-09-07 09:43:24,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:43:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-09-07 09:43:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-07 09:43:24,963 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:24,963 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:24,963 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2138515140, now seen corresponding path program 26 times [2019-09-07 09:43:24,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:24,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:24,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:24,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:24,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2019-09-07 09:43:25,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:25,410 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 09:43:25,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:43:25,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:43:25,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:25,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:43:25,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-09-07 09:43:26,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:26,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-09-07 09:43:26,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-07 09:43:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-07 09:43:26,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:43:26,144 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 47 states. [2019-09-07 09:43:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:26,559 INFO L93 Difference]: Finished difference Result 349 states and 360 transitions. [2019-09-07 09:43:26,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-07 09:43:26,560 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 189 [2019-09-07 09:43:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:26,561 INFO L225 Difference]: With dead ends: 349 [2019-09-07 09:43:26,562 INFO L226 Difference]: Without dead ends: 206 [2019-09-07 09:43:26,563 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:43:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-09-07 09:43:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2019-09-07 09:43:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-09-07 09:43:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2019-09-07 09:43:26,571 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 189 [2019-09-07 09:43:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:26,572 INFO L475 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2019-09-07 09:43:26,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-07 09:43:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2019-09-07 09:43:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-09-07 09:43:26,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:26,573 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:26,573 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash 228963004, now seen corresponding path program 27 times [2019-09-07 09:43:26,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:26,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:26,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:26,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:26,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2019-09-07 09:43:27,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:27,062 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:27,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:45:55,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-09-07 09:45:55,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:55,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 09:45:55,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 86 proven. 484 refuted. 0 times theorem prover too weak. 1411 trivial. 0 not checked. [2019-09-07 09:45:55,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:55,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 28 [2019-09-07 09:45:55,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:45:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:45:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:45:55,273 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand 28 states. [2019-09-07 09:45:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:55,591 INFO L93 Difference]: Finished difference Result 317 states and 329 transitions. [2019-09-07 09:45:55,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:45:55,592 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 197 [2019-09-07 09:45:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:55,593 INFO L225 Difference]: With dead ends: 317 [2019-09-07 09:45:55,593 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 09:45:55,594 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:45:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 09:45:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2019-09-07 09:45:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-09-07 09:45:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2019-09-07 09:45:55,602 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 197 [2019-09-07 09:45:55,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:55,602 INFO L475 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2019-09-07 09:45:55,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:45:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2019-09-07 09:45:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-07 09:45:55,604 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:55,604 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:55,604 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1601475312, now seen corresponding path program 28 times [2019-09-07 09:45:55,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:55,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:55,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:55,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:55,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2019-09-07 09:45:56,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:56,081 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 09:45:56,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:45:56,245 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:45:56,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:56,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:45:56,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (29)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:45:56,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:56,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 09:45:56,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:45:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:45:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:45:56,352 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand 27 states. [2019-09-07 09:45:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:56,469 INFO L93 Difference]: Finished difference Result 378 states and 386 transitions. [2019-09-07 09:45:56,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:45:56,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 209 [2019-09-07 09:45:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:56,472 INFO L225 Difference]: With dead ends: 378 [2019-09-07 09:45:56,472 INFO L226 Difference]: Without dead ends: 217 [2019-09-07 09:45:56,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 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 09:45:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-09-07 09:45:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2019-09-07 09:45:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-07 09:45:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2019-09-07 09:45:56,485 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 209 [2019-09-07 09:45:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:56,485 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2019-09-07 09:45:56,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:45:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2019-09-07 09:45:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-07 09:45:56,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:56,487 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:56,489 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:56,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1479458162, now seen corresponding path program 29 times [2019-09-07 09:45:56,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:56,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:56,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:56,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:56,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2019-09-07 09:45:57,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:57,006 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 09:45:57,028 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