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_copyInit_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:51:52,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:51:52,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:51:52,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:51:52,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:51:52,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:51:52,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:51:52,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:51:52,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:51:52,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:51:52,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:51:52,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:51:52,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:51:52,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:51:52,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:51:52,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:51:52,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:51:52,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:51:53,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:51:53,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:51:53,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:51:53,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:51:53,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:51:53,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:51:53,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:51:53,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:51:53,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:51:53,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:51:53,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:51:53,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:51:53,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:51:53,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:51:53,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:51:53,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:51:53,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:51:53,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:51:53,018 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 09:51:53,033 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:51:53,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:51:53,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:51:53,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:51:53,034 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:51:53,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:51:53,035 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:51:53,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:51:53,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:51:53,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:51:53,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:51:53,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:51:53,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:51:53,036 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:51:53,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:51:53,037 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:51:53,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:51:53,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:51:53,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:51:53,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:51:53,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:51:53,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:51:53,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:51:53,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:51:53,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:51:53,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:51:53,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:51:53,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:51:53,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:51:53,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:51:53,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:51:53,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:51:53,084 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:51:53,084 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:51:53,085 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-09-07 09:51:53,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70834a18c/43d35bb0221841b5bb9f1e8d7790624d/FLAG6a7cbbb9b [2019-09-07 09:51:53,578 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:51:53,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-09-07 09:51:53,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70834a18c/43d35bb0221841b5bb9f1e8d7790624d/FLAG6a7cbbb9b [2019-09-07 09:51:53,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70834a18c/43d35bb0221841b5bb9f1e8d7790624d [2019-09-07 09:51:53,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:51:53,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:51:53,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:51:53,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:51:53,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:51:53,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:51:53" (1/1) ... [2019-09-07 09:51:53,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af94a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:53, skipping insertion in model container [2019-09-07 09:51:53,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:51:53" (1/1) ... [2019-09-07 09:51:54,007 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:51:54,026 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:51:54,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:51:54,217 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:51:54,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:51:54,253 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:51:54,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54 WrapperNode [2019-09-07 09:51:54,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:51:54,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:51:54,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:51:54,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:51:54,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (1/1) ... [2019-09-07 09:51:54,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:51:54,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:51:54,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:51:54,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:51:54,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (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 09:51:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:51:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:51:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:51:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:51:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:51:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:51:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:51:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:51:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:51:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:51:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:51:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:51:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:51:54,648 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:51:54,648 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 09:51:54,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:51:54 BoogieIcfgContainer [2019-09-07 09:51:54,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:51:54,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:51:54,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:51:54,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:51:54,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:51:53" (1/3) ... [2019-09-07 09:51:54,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b9977d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:51:54, skipping insertion in model container [2019-09-07 09:51:54,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:51:54" (2/3) ... [2019-09-07 09:51:54,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b9977d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:51:54, skipping insertion in model container [2019-09-07 09:51:54,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:51:54" (3/3) ... [2019-09-07 09:51:54,674 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2019-09-07 09:51:54,700 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:51:54,723 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:51:54,762 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:51:54,810 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:51:54,811 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:51:54,811 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:51:54,811 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:51:54,811 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:51:54,812 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:51:54,812 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:51:54,812 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:51:54,812 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:51:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-07 09:51:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 09:51:54,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:54,836 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:54,838 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1085876810, now seen corresponding path program 1 times [2019-09-07 09:51:54,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:54,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:54,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:54,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:54,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:54,955 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 09:51:54,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:51:54,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:51:54,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:51:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:51:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:51:54,976 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-07 09:51:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:55,001 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-09-07 09:51:55,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:51:55,003 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-07 09:51:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:55,011 INFO L225 Difference]: With dead ends: 45 [2019-09-07 09:51:55,011 INFO L226 Difference]: Without dead ends: 21 [2019-09-07 09:51:55,015 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 09:51:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-07 09:51:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-07 09:51:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-07 09:51:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-07 09:51:55,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2019-09-07 09:51:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:55,057 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-07 09:51:55,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:51:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-07 09:51:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 09:51:55,058 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:55,058 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:55,059 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -274239930, now seen corresponding path program 1 times [2019-09-07 09:51:55,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:55,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:55,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:55,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:55,147 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 09:51:55,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:51:55,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:51:55,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:51:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:51:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:51:55,150 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 3 states. [2019-09-07 09:51:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:55,178 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-09-07 09:51:55,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:51:55,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-07 09:51:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:55,180 INFO L225 Difference]: With dead ends: 38 [2019-09-07 09:51:55,180 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 09:51:55,181 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 09:51:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 09:51:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-09-07 09:51:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-07 09:51:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-07 09:51:55,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-09-07 09:51:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:55,189 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-07 09:51:55,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:51:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-07 09:51:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-07 09:51:55,190 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:55,192 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:55,192 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1258895644, now seen corresponding path program 1 times [2019-09-07 09:51:55,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:55,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:55,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:55,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:51:55,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:55,291 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:55,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:55,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:51:55,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:51:55,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:55,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:51:55,384 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:51:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:51:55,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:51:55,386 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2019-09-07 09:51:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:55,447 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-09-07 09:51:55,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:51:55,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-09-07 09:51:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:55,449 INFO L225 Difference]: With dead ends: 42 [2019-09-07 09:51:55,449 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 09:51:55,450 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 09:51:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 09:51:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-09-07 09:51:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 09:51:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-09-07 09:51:55,456 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-09-07 09:51:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:55,457 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-09-07 09:51:55,457 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:51:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-09-07 09:51:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 09:51:55,458 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:55,458 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:55,459 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1615172030, now seen corresponding path program 2 times [2019-09-07 09:51:55,459 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:55,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:55,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:55,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:51:55,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:55,520 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:55,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:51:55,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:51:55,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:55,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:51:55,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:51:55,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:55,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:51:55,592 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:51:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:51:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:51:55,593 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2019-09-07 09:51:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:55,631 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-09-07 09:51:55,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:51:55,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-07 09:51:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:55,633 INFO L225 Difference]: With dead ends: 47 [2019-09-07 09:51:55,633 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 09:51:55,634 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:51:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 09:51:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 09:51:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 09:51:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-09-07 09:51:55,640 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2019-09-07 09:51:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:55,641 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-09-07 09:51:55,641 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:51:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-09-07 09:51:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-07 09:51:55,642 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:55,642 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:55,642 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1115557856, now seen corresponding path program 3 times [2019-09-07 09:51:55,643 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:55,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:55,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:55,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:51:55,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:55,748 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:55,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:51:55,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:51:55,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:55,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:51:55,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:51:55,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:55,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:51:55,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:51:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:51:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:51:55,820 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2019-09-07 09:51:55,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:55,877 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-09-07 09:51:55,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:51:55,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-09-07 09:51:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:55,879 INFO L225 Difference]: With dead ends: 52 [2019-09-07 09:51:55,879 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 09:51:55,880 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 09:51:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 09:51:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-07 09:51:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 09:51:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-09-07 09:51:55,886 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2019-09-07 09:51:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:55,887 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-09-07 09:51:55,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:51:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-09-07 09:51:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:51:55,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:55,888 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:55,889 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1574965310, now seen corresponding path program 4 times [2019-09-07 09:51:55,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:55,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:55,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:55,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:51:56,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:56,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:51:56,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:56,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:51:56,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:56,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:51:56,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-07 09:51:56,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:56,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 09:51:56,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:51:56,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:51:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:51:56,101 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2019-09-07 09:51:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:56,167 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-09-07 09:51:56,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:51:56,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-09-07 09:51:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:56,172 INFO L225 Difference]: With dead ends: 57 [2019-09-07 09:51:56,172 INFO L226 Difference]: Without dead ends: 36 [2019-09-07 09:51:56,173 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:51:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-07 09:51:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-09-07 09:51:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-07 09:51:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-09-07 09:51:56,185 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2019-09-07 09:51:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:56,186 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-09-07 09:51:56,186 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:51:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-09-07 09:51:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-07 09:51:56,188 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:56,188 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:56,188 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1364556508, now seen corresponding path program 5 times [2019-09-07 09:51:56,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:56,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:56,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:56,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:51:56,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:56,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:56,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:51:56,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 09:51:56,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:56,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:51:56,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 09:51:56,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:56,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:51:56,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:51:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:51:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:51:56,425 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2019-09-07 09:51:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:56,495 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-09-07 09:51:56,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:51:56,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-09-07 09:51:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:56,496 INFO L225 Difference]: With dead ends: 62 [2019-09-07 09:51:56,497 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 09:51:56,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 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 09:51:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 09:51:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-07 09:51:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-07 09:51:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-09-07 09:51:56,508 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2019-09-07 09:51:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:56,509 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-09-07 09:51:56,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:51:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-09-07 09:51:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-07 09:51:56,510 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:56,510 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:56,510 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2008503354, now seen corresponding path program 6 times [2019-09-07 09:51:56,511 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:56,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:56,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:51:56,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:56,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:51:56,649 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:56,702 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 09:51:56,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:56,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:51:56,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-07 09:51:56,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:56,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:51:56,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:51:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:51:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:51:56,737 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2019-09-07 09:51:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:56,816 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-09-07 09:51:56,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:51:56,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-09-07 09:51:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:56,819 INFO L225 Difference]: With dead ends: 67 [2019-09-07 09:51:56,819 INFO L226 Difference]: Without dead ends: 42 [2019-09-07 09:51:56,820 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:51:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-07 09:51:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-07 09:51:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-07 09:51:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-09-07 09:51:56,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2019-09-07 09:51:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:56,829 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-09-07 09:51:56,829 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:51:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-09-07 09:51:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-07 09:51:56,830 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:56,831 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:56,831 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1155270616, now seen corresponding path program 7 times [2019-09-07 09:51:56,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:56,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:56,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:56,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:51:56,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:56,946 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:56,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:56,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:51:56,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:51:57,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:57,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:51:57,027 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:51:57,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:51:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:51:57,028 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2019-09-07 09:51:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:57,086 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2019-09-07 09:51:57,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:51:57,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-09-07 09:51:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:57,088 INFO L225 Difference]: With dead ends: 72 [2019-09-07 09:51:57,088 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 09:51:57,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:51:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 09:51:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-09-07 09:51:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 09:51:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-09-07 09:51:57,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2019-09-07 09:51:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:57,095 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-09-07 09:51:57,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:51:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-09-07 09:51:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 09:51:57,096 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:57,097 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:57,097 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2090911178, now seen corresponding path program 8 times [2019-09-07 09:51:57,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:57,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:57,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:51:57,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:57,230 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:57,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:51:57,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:51:57,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:57,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:51:57,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:51:57,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:57,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:51:57,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:51:57,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:51:57,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:51:57,320 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2019-09-07 09:51:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:57,402 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-09-07 09:51:57,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:51:57,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-09-07 09:51:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:57,403 INFO L225 Difference]: With dead ends: 77 [2019-09-07 09:51:57,403 INFO L226 Difference]: Without dead ends: 48 [2019-09-07 09:51:57,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 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 09:51:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-07 09:51:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-09-07 09:51:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 09:51:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-09-07 09:51:57,410 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2019-09-07 09:51:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:57,410 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-09-07 09:51:57,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:51:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-09-07 09:51:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 09:51:57,411 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:57,411 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:57,412 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1997490476, now seen corresponding path program 9 times [2019-09-07 09:51:57,412 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:57,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:57,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:57,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:57,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:51:57,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:57,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:57,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:51:57,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 09:51:57,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:57,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:51:57,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:51:57,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:57,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 09:51:57,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:51:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:51:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:51:57,664 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 13 states. [2019-09-07 09:51:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:57,728 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2019-09-07 09:51:57,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:51:57,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-09-07 09:51:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:57,730 INFO L225 Difference]: With dead ends: 82 [2019-09-07 09:51:57,730 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 09:51:57,731 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 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 09:51:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 09:51:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-07 09:51:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-07 09:51:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-09-07 09:51:57,737 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 42 [2019-09-07 09:51:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:57,737 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-09-07 09:51:57,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:51:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-09-07 09:51:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 09:51:57,738 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:57,738 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:57,738 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash 527876658, now seen corresponding path program 10 times [2019-09-07 09:51:57,739 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:57,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:57,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:57,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:57,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:51:57,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:57,867 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 09:51:57,888 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 09:51:57,916 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:51:57,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:57,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:51:57,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 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 09:51:57,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:57,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:51:57,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:51:57,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:51:57,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:51:57,954 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2019-09-07 09:51:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:58,020 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2019-09-07 09:51:58,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:51:58,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-09-07 09:51:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:58,022 INFO L225 Difference]: With dead ends: 87 [2019-09-07 09:51:58,022 INFO L226 Difference]: Without dead ends: 54 [2019-09-07 09:51:58,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:51:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-07 09:51:58,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-09-07 09:51:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-07 09:51:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-09-07 09:51:58,029 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2019-09-07 09:51:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:58,029 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-09-07 09:51:58,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:51:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-09-07 09:51:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-07 09:51:58,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:58,030 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:58,030 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1374848976, now seen corresponding path program 11 times [2019-09-07 09:51:58,031 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:58,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:58,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:58,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:58,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-07 09:51:58,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:58,157 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:58,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:51:59,652 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 09:51:59,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:59,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:51:59,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-07 09:51:59,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:59,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:51:59,685 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:51:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:51:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:51:59,687 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 15 states. [2019-09-07 09:51:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:59,764 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2019-09-07 09:51:59,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:51:59,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2019-09-07 09:51:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:59,767 INFO L225 Difference]: With dead ends: 92 [2019-09-07 09:51:59,767 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 09:51:59,767 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:51:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 09:51:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-09-07 09:51:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 09:51:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-09-07 09:51:59,773 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 48 [2019-09-07 09:51:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:59,774 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-09-07 09:51:59,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:51:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-09-07 09:51:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 09:51:59,775 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:59,775 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:59,779 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:59,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1289950162, now seen corresponding path program 12 times [2019-09-07 09:51:59,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:59,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:59,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:59,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:59,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:51:59,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:59,948 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:59,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:52:01,227 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 09:52:01,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:01,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:52:01,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-09-07 09:52:01,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:01,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:52:01,268 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:52:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:52:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:52:01,269 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 16 states. [2019-09-07 09:52:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:01,347 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2019-09-07 09:52:01,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:52:01,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-09-07 09:52:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:01,348 INFO L225 Difference]: With dead ends: 97 [2019-09-07 09:52:01,349 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:52:01,349 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:52:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:52:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-09-07 09:52:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 09:52:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-09-07 09:52:01,355 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2019-09-07 09:52:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:01,355 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-09-07 09:52:01,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:52:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-09-07 09:52:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 09:52:01,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:01,356 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:01,356 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:01,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1556118220, now seen corresponding path program 13 times [2019-09-07 09:52:01,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:01,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:01,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:01,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:01,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:52:01,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:01,493 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 09:52:01,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:52:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:01,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:52:01,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:52:01,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:01,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 09:52:01,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:52:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:52:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:52:01,568 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2019-09-07 09:52:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:01,657 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2019-09-07 09:52:01,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 09:52:01,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2019-09-07 09:52:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:01,659 INFO L225 Difference]: With dead ends: 102 [2019-09-07 09:52:01,659 INFO L226 Difference]: Without dead ends: 63 [2019-09-07 09:52:01,660 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 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 09:52:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-07 09:52:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-09-07 09:52:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-07 09:52:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-09-07 09:52:01,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2019-09-07 09:52:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:01,669 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-09-07 09:52:01,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:52:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-09-07 09:52:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-07 09:52:01,670 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:01,670 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:01,670 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash 770750506, now seen corresponding path program 14 times [2019-09-07 09:52:01,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:01,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:01,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:01,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:52:01,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-07 09:52:01,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:01,824 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:01,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:52:01,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:52:01,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:01,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:52:01,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-07 09:52:01,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:01,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 09:52:01,908 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:52:01,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:52:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:52:01,914 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2019-09-07 09:52:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:01,996 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-09-07 09:52:01,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:52:01,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2019-09-07 09:52:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:01,997 INFO L225 Difference]: With dead ends: 107 [2019-09-07 09:52:01,997 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 09:52:01,998 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:52:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 09:52:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-09-07 09:52:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-07 09:52:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-09-07 09:52:02,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 57 [2019-09-07 09:52:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:02,003 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-09-07 09:52:02,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:52:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-09-07 09:52:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 09:52:02,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:02,004 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:02,004 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1363570744, now seen corresponding path program 15 times [2019-09-07 09:52:02,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:02,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:02,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:02,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:02,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:52:02,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:02,169 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) [2019-09-07 09:52:02,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:02,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 09:52:02,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:02,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:52:02,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:52:02,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:02,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:52:02,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:52:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:52:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:52:02,801 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 19 states. [2019-09-07 09:52:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:02,878 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2019-09-07 09:52:02,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:52:02,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2019-09-07 09:52:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:02,881 INFO L225 Difference]: With dead ends: 112 [2019-09-07 09:52:02,881 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 09:52:02,882 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:52:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 09:52:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-09-07 09:52:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 09:52:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-09-07 09:52:02,887 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2019-09-07 09:52:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:02,887 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-09-07 09:52:02,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:52:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-09-07 09:52:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 09:52:02,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:02,888 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:02,888 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash -938400218, now seen corresponding path program 16 times [2019-09-07 09:52:02,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:02,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:02,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:02,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:02,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:52:03,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:03,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:03,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:52:03,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:52:03,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:03,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:52:03,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-09-07 09:52:03,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:03,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:52:03,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:52:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:52:03,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:52:03,205 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2019-09-07 09:52:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:03,294 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2019-09-07 09:52:03,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:52:03,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2019-09-07 09:52:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:03,295 INFO L225 Difference]: With dead ends: 117 [2019-09-07 09:52:03,296 INFO L226 Difference]: Without dead ends: 72 [2019-09-07 09:52:03,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 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 09:52:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-07 09:52:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-09-07 09:52:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 09:52:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2019-09-07 09:52:03,302 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2019-09-07 09:52:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:03,303 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2019-09-07 09:52:03,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:52:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2019-09-07 09:52:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-07 09:52:03,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:03,304 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:03,304 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1438435012, now seen corresponding path program 17 times [2019-09-07 09:52:03,305 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:03,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:03,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:03,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:03,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:52:03,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:03,479 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:03,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:52:27,615 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 09:52:27,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:27,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:52:27,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:52:27,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:27,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 09:52:27,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:52:27,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:52:27,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:52:27,691 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 21 states. [2019-09-07 09:52:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:27,792 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2019-09-07 09:52:27,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:52:27,793 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2019-09-07 09:52:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:27,794 INFO L225 Difference]: With dead ends: 122 [2019-09-07 09:52:27,794 INFO L226 Difference]: Without dead ends: 75 [2019-09-07 09:52:27,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:52:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-07 09:52:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-09-07 09:52:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-07 09:52:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-09-07 09:52:27,799 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2019-09-07 09:52:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:27,800 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-09-07 09:52:27,800 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:52:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-09-07 09:52:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 09:52:27,801 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:27,801 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:27,801 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1038272990, now seen corresponding path program 18 times [2019-09-07 09:52:27,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:27,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:27,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:27,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:27,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-07 09:52:28,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:28,037 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:28,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:52:44,073 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 09:52:44,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:44,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:52:44,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 18 proven. 324 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-07 09:52:44,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:44,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-09-07 09:52:44,155 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:52:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:52:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:52:44,156 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 23 states. [2019-09-07 09:52:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:44,279 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2019-09-07 09:52:44,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:52:44,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2019-09-07 09:52:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:44,282 INFO L225 Difference]: With dead ends: 133 [2019-09-07 09:52:44,283 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 09:52:44,283 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:52:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 09:52:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2019-09-07 09:52:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-07 09:52:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-09-07 09:52:44,301 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2019-09-07 09:52:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:44,301 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-09-07 09:52:44,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:52:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-09-07 09:52:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 09:52:44,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:44,302 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:44,303 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash 673783744, now seen corresponding path program 19 times [2019-09-07 09:52:44,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:44,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:44,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:44,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:44,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:52:44,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:44,599 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 09:52:44,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:52:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:44,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:52:44,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:52:44,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:44,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 09:52:44,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:52:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:52:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:52:44,702 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 23 states. [2019-09-07 09:52:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:44,822 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2019-09-07 09:52:44,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:52:44,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2019-09-07 09:52:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:44,823 INFO L225 Difference]: With dead ends: 132 [2019-09-07 09:52:44,823 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 09:52:44,824 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:52:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 09:52:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-09-07 09:52:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-07 09:52:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-09-07 09:52:44,828 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2019-09-07 09:52:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:44,828 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-09-07 09:52:44,828 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:52:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-09-07 09:52:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 09:52:44,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:44,829 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:44,829 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 624158750, now seen corresponding path program 20 times [2019-09-07 09:52:44,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:44,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:44,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:44,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:52:44,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:52:45,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:45,099 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 09:52:45,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:52:45,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:52:45,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:45,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:52:45,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:52:45,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:45,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 09:52:45,185 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:52:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:52:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:52:45,186 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 24 states. [2019-09-07 09:52:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:45,326 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2019-09-07 09:52:45,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:52:45,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2019-09-07 09:52:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:45,330 INFO L225 Difference]: With dead ends: 137 [2019-09-07 09:52:45,331 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 09:52:45,331 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:52:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 09:52:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-09-07 09:52:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 09:52:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2019-09-07 09:52:45,340 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2019-09-07 09:52:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:45,340 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2019-09-07 09:52:45,340 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:52:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2019-09-07 09:52:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-07 09:52:45,341 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:45,341 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:45,341 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2065851716, now seen corresponding path program 21 times [2019-09-07 09:52:45,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:45,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:45,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:52:45,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:45,642 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 09:52:45,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:52:51,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:52:51,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:51,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 09:52:51,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (22)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:52:51,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:51,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:52:51,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:52:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:52:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:52:51,574 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 25 states. [2019-09-07 09:52:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:51,689 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2019-09-07 09:52:51,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:52:51,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2019-09-07 09:52:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:51,691 INFO L225 Difference]: With dead ends: 142 [2019-09-07 09:52:51,691 INFO L226 Difference]: Without dead ends: 87 [2019-09-07 09:52:51,691 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 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 09:52:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-07 09:52:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-09-07 09:52:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 09:52:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-09-07 09:52:51,695 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 78 [2019-09-07 09:52:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:51,695 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-09-07 09:52:51,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:52:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-09-07 09:52:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 09:52:51,696 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:51,696 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:51,697 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2097923046, now seen corresponding path program 22 times [2019-09-07 09:52:51,697 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:51,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:51,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-07 09:52:51,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:51,998 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 09:52:52,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:52:52,064 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:52:52,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:52,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:52:52,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:52:52,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:52,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 09:52:52,089 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 09:52:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 09:52:52,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:52:52,090 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 26 states. [2019-09-07 09:52:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:52,205 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2019-09-07 09:52:52,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:52:52,208 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2019-09-07 09:52:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:52,209 INFO L225 Difference]: With dead ends: 147 [2019-09-07 09:52:52,209 INFO L226 Difference]: Without dead ends: 90 [2019-09-07 09:52:52,210 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:52:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-07 09:52:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-09-07 09:52:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 09:52:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2019-09-07 09:52:52,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 81 [2019-09-07 09:52:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:52,215 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2019-09-07 09:52:52,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 09:52:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2019-09-07 09:52:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-07 09:52:52,216 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:52,216 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:52,216 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 322516920, now seen corresponding path program 23 times [2019-09-07 09:52:52,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:52,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:52,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:52,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:52,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 09:52:52,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:52,511 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:52,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:54:01,514 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-07 09:54:01,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:01,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:54:01,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 09:54:01,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:01,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 09:54:01,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:54:01,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:54:01,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:54:01,605 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 27 states. [2019-09-07 09:54:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:01,720 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2019-09-07 09:54:01,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:54:01,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2019-09-07 09:54:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:01,722 INFO L225 Difference]: With dead ends: 152 [2019-09-07 09:54:01,722 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 09:54:01,723 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:54:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 09:54:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-09-07 09:54:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 09:54:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-09-07 09:54:01,727 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 84 [2019-09-07 09:54:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:01,727 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-09-07 09:54:01,727 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:54:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-09-07 09:54:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 09:54:01,728 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:01,728 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:01,729 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1250086378, now seen corresponding path program 24 times [2019-09-07 09:54:01,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:01,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:01,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:54:02,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:02,049 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:02,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:55:28,814 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-07 09:55:28,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:55:28,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 09:55:28,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:55:28,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:28,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 09:55:28,883 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:55:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:55:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:55:28,884 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 28 states. [2019-09-07 09:55:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:29,007 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2019-09-07 09:55:29,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:55:29,008 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2019-09-07 09:55:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:29,009 INFO L225 Difference]: With dead ends: 157 [2019-09-07 09:55:29,009 INFO L226 Difference]: Without dead ends: 96 [2019-09-07 09:55:29,010 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:55:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-07 09:55:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-09-07 09:55:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-07 09:55:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2019-09-07 09:55:29,014 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 87 [2019-09-07 09:55:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:29,014 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2019-09-07 09:55:29,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:55:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2019-09-07 09:55:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-07 09:55:29,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:29,015 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:29,016 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:29,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2095384908, now seen corresponding path program 25 times [2019-09-07 09:55:29,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:29,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:29,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:29,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:55:29,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-09-07 09:55:29,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:29,346 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:55:29,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:55:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:29,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:55:29,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-09-07 09:55:29,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:29,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 09:55:29,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:55:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:55:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:55:29,439 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 29 states. [2019-09-07 09:55:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:29,570 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2019-09-07 09:55:29,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 09:55:29,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2019-09-07 09:55:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:29,571 INFO L225 Difference]: With dead ends: 162 [2019-09-07 09:55:29,571 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 09:55:29,572 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:55:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 09:55:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-09-07 09:55:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-07 09:55:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2019-09-07 09:55:29,576 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 90 [2019-09-07 09:55:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:29,576 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2019-09-07 09:55:29,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:55:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2019-09-07 09:55:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-07 09:55:29,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:29,578 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:29,578 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1620194798, now seen corresponding path program 26 times [2019-09-07 09:55:29,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:29,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:29,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:29,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:55:29,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:55:29,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:29,947 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 09:55:29,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:55:30,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:55:30,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:55:30,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:55:30,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:55:30,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:30,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 09:55:30,041 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:55:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:55:30,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:55:30,041 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 30 states. [2019-09-07 09:55:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:30,186 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2019-09-07 09:55:30,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:55:30,187 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2019-09-07 09:55:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:30,188 INFO L225 Difference]: With dead ends: 167 [2019-09-07 09:55:30,188 INFO L226 Difference]: Without dead ends: 102 [2019-09-07 09:55:30,189 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:55:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-07 09:55:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-09-07 09:55:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 09:55:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2019-09-07 09:55:30,196 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2019-09-07 09:55:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:30,196 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2019-09-07 09:55:30,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:55:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2019-09-07 09:55:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 09:55:30,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:30,197 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:30,198 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1289869232, now seen corresponding path program 27 times [2019-09-07 09:55:30,198 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:30,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:30,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:30,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:55:30,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:55:30,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:30,625 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 09:55:30,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:56:01,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 09:56:01,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:56:01,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 09:56:01,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:56:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:56:01,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:56:01,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-07 09:56:01,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:56:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:56:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:56:01,763 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 31 states. [2019-09-07 09:56:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:56:01,896 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2019-09-07 09:56:01,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 09:56:01,896 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 96 [2019-09-07 09:56:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:56:01,897 INFO L225 Difference]: With dead ends: 172 [2019-09-07 09:56:01,897 INFO L226 Difference]: Without dead ends: 105 [2019-09-07 09:56:01,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:56:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-07 09:56:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-09-07 09:56:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 09:56:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-09-07 09:56:01,903 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 96 [2019-09-07 09:56:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:56:01,903 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-09-07 09:56:01,903 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:56:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-09-07 09:56:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 09:56:01,904 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:56:01,904 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:56:01,904 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:56:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:56:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash -337312754, now seen corresponding path program 28 times [2019-09-07 09:56:01,905 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:56:01,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:56:01,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:01,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:56:01,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:56:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 09:56:02,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:56:02,282 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 09:56:02,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:56:02,337 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:56:02,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:56:02,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 09:56:02,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:56:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-09-07 09:56:02,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:56:02,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 09:56:02,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 09:56:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 09:56:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 09:56:02,368 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 32 states. [2019-09-07 09:56:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:56:02,512 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2019-09-07 09:56:02,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:56:02,512 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2019-09-07 09:56:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:56:02,513 INFO L225 Difference]: With dead ends: 177 [2019-09-07 09:56:02,514 INFO L226 Difference]: Without dead ends: 108 [2019-09-07 09:56:02,515 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 09:56:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-07 09:56:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-09-07 09:56:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-07 09:56:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2019-09-07 09:56:02,519 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 99 [2019-09-07 09:56:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:56:02,519 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2019-09-07 09:56:02,519 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 09:56:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2019-09-07 09:56:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 09:56:02,520 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:56:02,520 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:56:02,520 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:56:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:56:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1902959276, now seen corresponding path program 29 times [2019-09-07 09:56:02,521 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:56:02,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:56:02,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:02,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:56:02,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:56:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 09:56:03,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:56:03,012 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:56:03,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:57:59,118 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-07 09:57:59,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:57:59,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:57:59,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 09:57:59,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:59,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-07 09:57:59,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:57:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:57:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:57:59,220 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 33 states. [2019-09-07 09:57:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:59,401 INFO L93 Difference]: Finished difference Result 182 states and 187 transitions. [2019-09-07 09:57:59,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 09:57:59,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2019-09-07 09:57:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:59,403 INFO L225 Difference]: With dead ends: 182 [2019-09-07 09:57:59,403 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 09:57:59,405 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:57:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 09:57:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-09-07 09:57:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-07 09:57:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-09-07 09:57:59,411 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 102 [2019-09-07 09:57:59,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:59,411 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-09-07 09:57:59,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:57:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-09-07 09:57:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-07 09:57:59,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:59,413 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:57:59,413 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -830349302, now seen corresponding path program 30 times [2019-09-07 09:57:59,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:59,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:59,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:59,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:57:59,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:58:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 09:58:00,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:58:00,155 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:58:00,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:38,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-07 10:00:38,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:00:38,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:00:38,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-09-07 10:00:39,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:39,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-07 10:00:39,034 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 10:00:39,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 10:00:39,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:00:39,034 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 34 states. [2019-09-07 10:00:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:39,165 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2019-09-07 10:00:39,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 10:00:39,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 105 [2019-09-07 10:00:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:39,171 INFO L225 Difference]: With dead ends: 187 [2019-09-07 10:00:39,171 INFO L226 Difference]: Without dead ends: 114 [2019-09-07 10:00:39,172 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:00:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-07 10:00:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-09-07 10:00:39,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 10:00:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2019-09-07 10:00:39,177 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 105 [2019-09-07 10:00:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:39,178 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2019-09-07 10:00:39,178 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 10:00:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2019-09-07 10:00:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-07 10:00:39,179 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:39,179 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:39,179 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash 974847912, now seen corresponding path program 31 times [2019-09-07 10:00:39,179 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:39,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:39,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:39,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:00:39,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-09-07 10:00:39,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:39,764 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:00:39,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:39,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 10:00:39,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:00:39,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:39,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-09-07 10:00:39,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 10:00:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 10:00:39,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 10:00:39,901 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 35 states. [2019-09-07 10:00:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:40,070 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2019-09-07 10:00:40,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 10:00:40,071 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 108 [2019-09-07 10:00:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:40,072 INFO L225 Difference]: With dead ends: 192 [2019-09-07 10:00:40,072 INFO L226 Difference]: Without dead ends: 117 [2019-09-07 10:00:40,073 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 10:00:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-07 10:00:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-09-07 10:00:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 10:00:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2019-09-07 10:00:40,079 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 108 [2019-09-07 10:00:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:40,079 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2019-09-07 10:00:40,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 10:00:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2019-09-07 10:00:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 10:00:40,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:40,080 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:40,081 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1016898042, now seen corresponding path program 32 times [2019-09-07 10:00:40,081 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:40,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:40,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:40,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:00:40,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-09-07 10:00:40,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:40,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:40,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:00:40,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:00:40,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:00:40,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 10:00:40,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-09-07 10:00:40,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:40,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-09-07 10:00:40,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 10:00:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 10:00:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 10:00:40,795 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 36 states. [2019-09-07 10:00:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:40,968 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2019-09-07 10:00:40,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 10:00:40,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 111 [2019-09-07 10:00:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:40,970 INFO L225 Difference]: With dead ends: 197 [2019-09-07 10:00:40,970 INFO L226 Difference]: Without dead ends: 120 [2019-09-07 10:00:40,971 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 10:00:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-07 10:00:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-09-07 10:00:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-07 10:00:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2019-09-07 10:00:40,976 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 111 [2019-09-07 10:00:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:40,976 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2019-09-07 10:00:40,976 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 10:00:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2019-09-07 10:00:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-07 10:00:40,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:40,977 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:40,977 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash -120895836, now seen corresponding path program 33 times [2019-09-07 10:00:40,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:40,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:40,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:40,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:00:40,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 10:00:41,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:41,589 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:00:41,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:42,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 10:01:42,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:01:42,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 10:01:42,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 10:01:42,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:42,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-07 10:01:42,358 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 10:01:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 10:01:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 10:01:42,359 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 37 states. [2019-09-07 10:01:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:42,557 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2019-09-07 10:01:42,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 10:01:42,558 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 114 [2019-09-07 10:01:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:42,559 INFO L225 Difference]: With dead ends: 202 [2019-09-07 10:01:42,559 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 10:01:42,560 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 10:01:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 10:01:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-09-07 10:01:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 10:01:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2019-09-07 10:01:42,565 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 114 [2019-09-07 10:01:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:42,565 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2019-09-07 10:01:42,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 10:01:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2019-09-07 10:01:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 10:01:42,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:42,566 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:42,566 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1328053762, now seen corresponding path program 34 times [2019-09-07 10:01:42,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:42,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:42,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:42,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:01:42,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-09-07 10:01:43,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:43,212 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:43,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:01:43,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:01:43,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:01:43,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 10:01:43,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-09-07 10:01:43,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:43,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-09-07 10:01:43,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 10:01:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 10:01:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 10:01:43,316 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 38 states. [2019-09-07 10:01:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:43,486 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2019-09-07 10:01:43,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 10:01:43,487 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 117 [2019-09-07 10:01:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:43,487 INFO L225 Difference]: With dead ends: 207 [2019-09-07 10:01:43,487 INFO L226 Difference]: Without dead ends: 126 [2019-09-07 10:01:43,488 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 10:01:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-07 10:01:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-09-07 10:01:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 10:01:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2019-09-07 10:01:43,492 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2019-09-07 10:01:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:43,492 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2019-09-07 10:01:43,492 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 10:01:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2019-09-07 10:01:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 10:01:43,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:43,494 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:43,494 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash -941838432, now seen corresponding path program 35 times [2019-09-07 10:01:43,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:43,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:43,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:43,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:01:43,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-09-07 10:01:44,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:44,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:01:44,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:04:26,375 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-09-07 10:04:26,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:04:26,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 10:04:26,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:04:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-07 10:04:26,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:04:26,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-07 10:04:26,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 10:04:26,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 10:04:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 10:04:26,472 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 39 states. [2019-09-07 10:04:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:04:26,678 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2019-09-07 10:04:26,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 10:04:26,680 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 120 [2019-09-07 10:04:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:04:26,681 INFO L225 Difference]: With dead ends: 212 [2019-09-07 10:04:26,681 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 10:04:26,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 10:04:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 10:04:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-09-07 10:04:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 10:04:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2019-09-07 10:04:26,686 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 120 [2019-09-07 10:04:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:04:26,686 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2019-09-07 10:04:26,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 10:04:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2019-09-07 10:04:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 10:04:26,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:04:26,688 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:04:26,688 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:04:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:04:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1091551234, now seen corresponding path program 36 times [2019-09-07 10:04:26,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:04:26,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:04:26,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:04:26,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:04:26,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:04:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:04:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-09-07 10:04:27,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:04:27,436 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:04:27,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE