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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 22:42:58,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 22:42:58,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 22:42:58,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 22:42:58,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 22:42:58,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 22:42:58,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 22:42:58,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 22:42:58,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 22:42:58,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 22:42:58,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 22:42:58,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 22:42:58,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 22:42:58,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 22:42:58,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 22:42:58,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 22:42:58,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 22:42:58,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 22:42:58,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 22:42:58,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 22:42:59,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 22:42:59,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 22:42:59,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 22:42:59,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 22:42:59,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 22:42:59,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-01 22:42:59,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-01 22:42:59,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-01 22:42:59,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-01 22:42:59,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-01 22:42:59,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-01 22:42:59,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-01 22:42:59,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-01 22:42:59,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 22:42:59,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 22:42:59,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 22:42:59,017 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 [2019-10-01 22:42:59,039 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 22:42:59,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 22:42:59,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 22:42:59,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 22:42:59,043 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 22:42:59,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 22:42:59,043 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 22:42:59,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 22:42:59,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 22:42:59,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 22:42:59,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 22:42:59,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 22:42:59,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 22:42:59,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 22:42:59,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 22:42:59,045 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 22:42:59,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 22:42:59,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 22:42:59,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 22:42:59,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 22:42:59,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 22:42:59,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:42:59,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 22:42:59,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 22:42:59,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 22:42:59,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 22:42:59,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 22:42:59,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 22:42:59,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 22:42:59,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 22:42:59,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 22:42:59,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 22:42:59,104 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 22:42:59,104 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 22:42:59,105 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-10-01 22:42:59,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ffd8db25/08a8d5f4be604db9b15fd82455601eb8/FLAGa965830d9 [2019-10-01 22:42:59,628 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 22:42:59,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-10-01 22:42:59,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ffd8db25/08a8d5f4be604db9b15fd82455601eb8/FLAGa965830d9 [2019-10-01 22:43:00,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ffd8db25/08a8d5f4be604db9b15fd82455601eb8 [2019-10-01 22:43:00,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 22:43:00,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 22:43:00,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 22:43:00,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 22:43:00,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 22:43:00,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dea371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00, skipping insertion in model container [2019-10-01 22:43:00,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,038 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 22:43:00,057 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 22:43:00,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:43:00,237 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 22:43:00,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:43:00,371 INFO L192 MainTranslator]: Completed translation [2019-10-01 22:43:00,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00 WrapperNode [2019-10-01 22:43:00,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 22:43:00,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 22:43:00,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 22:43:00,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 22:43:00,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (1/1) ... [2019-10-01 22:43:00,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 22:43:00,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 22:43:00,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 22:43:00,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 22:43:00,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (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 [2019-10-01 22:43:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 22:43:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 22:43:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 22:43:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 22:43:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 22:43:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 22:43:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-01 22:43:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 22:43:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 22:43:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 22:43:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 22:43:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 22:43:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 22:43:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 22:43:00,851 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 22:43:00,851 INFO L283 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-01 22:43:00,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:43:00 BoogieIcfgContainer [2019-10-01 22:43:00,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 22:43:00,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 22:43:00,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 22:43:00,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 22:43:00,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 10:43:00" (1/3) ... [2019-10-01 22:43:00,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f70baa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:43:00, skipping insertion in model container [2019-10-01 22:43:00,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:43:00" (2/3) ... [2019-10-01 22:43:00,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f70baa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:43:00, skipping insertion in model container [2019-10-01 22:43:00,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:43:00" (3/3) ... [2019-10-01 22:43:00,861 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2019-10-01 22:43:00,871 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 22:43:00,879 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 22:43:00,896 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 22:43:00,923 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 22:43:00,923 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 22:43:00,924 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 22:43:00,924 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 22:43:00,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 22:43:00,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 22:43:00,924 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 22:43:00,924 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 22:43:00,925 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 22:43:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-01 22:43:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 22:43:00,947 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:00,947 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:00,949 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2019-10-01 22:43:00,956 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:00,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:01,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:01,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:43:01,103 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:43:01,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 22:43:01,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 22:43:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 22:43:01,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:43:01,124 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2019-10-01 22:43:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:01,151 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-10-01 22:43:01,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 22:43:01,153 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-10-01 22:43:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:01,162 INFO L225 Difference]: With dead ends: 70 [2019-10-01 22:43:01,162 INFO L226 Difference]: Without dead ends: 34 [2019-10-01 22:43:01,166 INFO L640 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 [2019-10-01 22:43:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-01 22:43:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-01 22:43:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-01 22:43:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-01 22:43:01,206 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-10-01 22:43:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:01,207 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-01 22:43:01,207 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 22:43:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-01 22:43:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 22:43:01,209 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:01,209 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:01,209 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:01,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1625097866, now seen corresponding path program 1 times [2019-10-01 22:43:01,210 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:01,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:01,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:01,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:43:01,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:43:01,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:43:01,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:43:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:43:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:43:01,305 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2019-10-01 22:43:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:01,337 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-10-01 22:43:01,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:43:01,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-01 22:43:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:01,339 INFO L225 Difference]: With dead ends: 62 [2019-10-01 22:43:01,339 INFO L226 Difference]: Without dead ends: 36 [2019-10-01 22:43:01,341 INFO L640 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 [2019-10-01 22:43:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-01 22:43:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-01 22:43:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-01 22:43:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-01 22:43:01,349 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2019-10-01 22:43:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:01,349 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-01 22:43:01,349 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:43:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-01 22:43:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-01 22:43:01,351 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:01,351 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:01,351 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1623092332, now seen corresponding path program 1 times [2019-10-01 22:43:01,351 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:01,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:01,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:43:01,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:43:01,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:43:01,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:43:01,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:43:01,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:43:01,426 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2019-10-01 22:43:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:01,504 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-10-01 22:43:01,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:43:01,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-01 22:43:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:01,506 INFO L225 Difference]: With dead ends: 68 [2019-10-01 22:43:01,506 INFO L226 Difference]: Without dead ends: 45 [2019-10-01 22:43:01,507 INFO L640 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 [2019-10-01 22:43:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-01 22:43:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-10-01 22:43:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-01 22:43:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-01 22:43:01,515 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2019-10-01 22:43:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:01,515 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-01 22:43:01,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:43:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-01 22:43:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-01 22:43:01,517 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:01,517 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:01,517 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1928668694, now seen corresponding path program 1 times [2019-10-01 22:43:01,518 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:01,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:01,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:01,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 22:43:01,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:01,665 INFO L224 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 [2019-10-01 22:43:01,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:01,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:43:01,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 22:43:01,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:01,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-01 22:43:01,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 22:43:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 22:43:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:43:01,827 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-10-01 22:43:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:01,874 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-01 22:43:01,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 22:43:01,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-01 22:43:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:01,876 INFO L225 Difference]: With dead ends: 74 [2019-10-01 22:43:01,876 INFO L226 Difference]: Without dead ends: 43 [2019-10-01 22:43:01,879 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:43:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-01 22:43:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-01 22:43:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-01 22:43:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-01 22:43:01,886 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2019-10-01 22:43:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:01,886 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-01 22:43:01,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 22:43:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-01 22:43:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-01 22:43:01,888 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:01,888 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:01,888 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash 359479048, now seen corresponding path program 2 times [2019-10-01 22:43:01,889 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:01,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:01,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:01,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-01 22:43:02,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:02,003 INFO L224 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 [2019-10-01 22:43:02,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:43:02,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:43:02,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:02,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:43:02,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 22:43:02,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:02,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-10-01 22:43:02,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 22:43:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 22:43:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-01 22:43:02,152 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2019-10-01 22:43:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:02,292 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2019-10-01 22:43:02,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 22:43:02,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-10-01 22:43:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:02,293 INFO L225 Difference]: With dead ends: 91 [2019-10-01 22:43:02,294 INFO L226 Difference]: Without dead ends: 60 [2019-10-01 22:43:02,294 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-01 22:43:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-01 22:43:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-10-01 22:43:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-01 22:43:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-10-01 22:43:02,311 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 37 [2019-10-01 22:43:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:02,311 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-10-01 22:43:02,311 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 22:43:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-10-01 22:43:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-01 22:43:02,313 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:02,313 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:02,313 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1340334980, now seen corresponding path program 3 times [2019-10-01 22:43:02,314 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:02,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:02,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:02,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:02,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-01 22:43:02,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:02,475 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:43:02,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:43:02,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-01 22:43:02,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:02,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:43:02,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-01 22:43:02,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:02,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-01 22:43:02,572 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 22:43:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 22:43:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:43:02,573 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2019-10-01 22:43:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:02,683 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2019-10-01 22:43:02,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 22:43:02,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-10-01 22:43:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:02,684 INFO L225 Difference]: With dead ends: 104 [2019-10-01 22:43:02,685 INFO L226 Difference]: Without dead ends: 69 [2019-10-01 22:43:02,685 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:43:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-01 22:43:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-10-01 22:43:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-01 22:43:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-10-01 22:43:02,694 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2019-10-01 22:43:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:02,695 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-10-01 22:43:02,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 22:43:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-10-01 22:43:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-01 22:43:02,696 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:02,696 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:02,697 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -493166382, now seen corresponding path program 4 times [2019-10-01 22:43:02,697 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:02,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:02,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:02,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:02,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-01 22:43:02,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:02,791 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:43:02,808 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:43:02,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:43:02,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:02,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 22:43:02,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-01 22:43:02,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:02,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-01 22:43:02,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 22:43:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 22:43:02,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:43:02,915 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 10 states. [2019-10-01 22:43:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:03,092 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2019-10-01 22:43:03,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 22:43:03,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2019-10-01 22:43:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:03,094 INFO L225 Difference]: With dead ends: 133 [2019-10-01 22:43:03,094 INFO L226 Difference]: Without dead ends: 82 [2019-10-01 22:43:03,095 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:43:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-01 22:43:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2019-10-01 22:43:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-01 22:43:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-10-01 22:43:03,105 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 59 [2019-10-01 22:43:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:03,106 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-10-01 22:43:03,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 22:43:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-10-01 22:43:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-01 22:43:03,108 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:03,108 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:03,108 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1226504378, now seen corresponding path program 5 times [2019-10-01 22:43:03,109 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:03,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:03,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:03,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:03,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-01 22:43:03,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:03,287 INFO L224 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 [2019-10-01 22:43:03,320 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:43:14,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-01 22:43:14,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:14,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:43:14,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-01 22:43:14,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:14,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-01 22:43:14,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 22:43:14,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 22:43:14,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:43:14,162 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 8 states. [2019-10-01 22:43:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:14,292 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2019-10-01 22:43:14,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 22:43:14,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2019-10-01 22:43:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:14,294 INFO L225 Difference]: With dead ends: 142 [2019-10-01 22:43:14,294 INFO L226 Difference]: Without dead ends: 91 [2019-10-01 22:43:14,295 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:43:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-01 22:43:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2019-10-01 22:43:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-01 22:43:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2019-10-01 22:43:14,304 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 71 [2019-10-01 22:43:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:14,305 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2019-10-01 22:43:14,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 22:43:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2019-10-01 22:43:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 22:43:14,306 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:14,307 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:14,307 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:14,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1901713180, now seen corresponding path program 6 times [2019-10-01 22:43:14,307 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:14,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:14,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-01 22:43:14,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:14,439 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:43:14,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:43:15,703 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-01 22:43:15,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:15,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 22:43:15,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-01 22:43:15,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:15,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-01 22:43:15,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 22:43:15,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 22:43:15,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 22:43:15,739 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 9 states. [2019-10-01 22:43:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:15,887 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2019-10-01 22:43:15,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 22:43:15,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2019-10-01 22:43:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:15,889 INFO L225 Difference]: With dead ends: 160 [2019-10-01 22:43:15,889 INFO L226 Difference]: Without dead ends: 101 [2019-10-01 22:43:15,890 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 22:43:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-01 22:43:15,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2019-10-01 22:43:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-01 22:43:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2019-10-01 22:43:15,899 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 81 [2019-10-01 22:43:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:15,899 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2019-10-01 22:43:15,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 22:43:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2019-10-01 22:43:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-01 22:43:15,901 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:15,902 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:15,902 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:15,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1690309490, now seen corresponding path program 7 times [2019-10-01 22:43:15,902 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:15,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:15,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:15,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:15,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-01 22:43:16,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:16,077 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:43:16,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:43:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:16,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:43:16,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:43:16,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:16,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-10-01 22:43:16,248 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 22:43:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 22:43:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:43:16,248 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 14 states. [2019-10-01 22:43:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:16,476 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2019-10-01 22:43:16,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 22:43:16,477 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 91 [2019-10-01 22:43:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:16,478 INFO L225 Difference]: With dead ends: 195 [2019-10-01 22:43:16,478 INFO L226 Difference]: Without dead ends: 114 [2019-10-01 22:43:16,479 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:43:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-01 22:43:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2019-10-01 22:43:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-01 22:43:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2019-10-01 22:43:16,487 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 91 [2019-10-01 22:43:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:16,487 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2019-10-01 22:43:16,487 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 22:43:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2019-10-01 22:43:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-01 22:43:16,489 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:16,489 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:16,490 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1863992858, now seen corresponding path program 8 times [2019-10-01 22:43:16,490 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:16,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:16,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:16,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:43:16,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-01 22:43:16,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:16,611 INFO L224 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 [2019-10-01 22:43:16,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:43:16,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:43:16,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:16,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 22:43:16,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2019-10-01 22:43:16,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:16,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-10-01 22:43:16,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:43:16,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:43:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:43:16,793 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 16 states. [2019-10-01 22:43:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:17,053 INFO L93 Difference]: Finished difference Result 217 states and 234 transitions. [2019-10-01 22:43:17,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 22:43:17,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2019-10-01 22:43:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:17,055 INFO L225 Difference]: With dead ends: 217 [2019-10-01 22:43:17,055 INFO L226 Difference]: Without dead ends: 126 [2019-10-01 22:43:17,055 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:43:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-01 22:43:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2019-10-01 22:43:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-01 22:43:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2019-10-01 22:43:17,063 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 103 [2019-10-01 22:43:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:17,064 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2019-10-01 22:43:17,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:43:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2019-10-01 22:43:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-01 22:43:17,070 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:17,070 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:17,071 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash -814079398, now seen corresponding path program 9 times [2019-10-01 22:43:17,073 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:17,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:17,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:17,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:17,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-10-01 22:43:17,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:17,306 INFO L224 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 [2019-10-01 22:43:17,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:43:23,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-01 22:43:23,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:23,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 22:43:23,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-10-01 22:43:23,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:23,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-10-01 22:43:23,813 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 22:43:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 22:43:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:43:23,814 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 18 states. [2019-10-01 22:43:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:24,192 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2019-10-01 22:43:24,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-01 22:43:24,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2019-10-01 22:43:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:24,195 INFO L225 Difference]: With dead ends: 239 [2019-10-01 22:43:24,196 INFO L226 Difference]: Without dead ends: 138 [2019-10-01 22:43:24,197 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:43:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-01 22:43:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2019-10-01 22:43:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-01 22:43:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2019-10-01 22:43:24,210 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 115 [2019-10-01 22:43:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:24,210 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2019-10-01 22:43:24,210 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 22:43:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2019-10-01 22:43:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-01 22:43:24,212 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:24,212 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:24,213 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 143543502, now seen corresponding path program 10 times [2019-10-01 22:43:24,213 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:24,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:24,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:24,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:24,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2019-10-01 22:43:24,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:24,479 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:43:24,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:43:24,596 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:43:24,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:24,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 22:43:24,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:43:24,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:24,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-10-01 22:43:24,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 22:43:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 22:43:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:43:24,724 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 20 states. [2019-10-01 22:43:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:25,040 INFO L93 Difference]: Finished difference Result 261 states and 278 transitions. [2019-10-01 22:43:25,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 22:43:25,042 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 127 [2019-10-01 22:43:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:25,044 INFO L225 Difference]: With dead ends: 261 [2019-10-01 22:43:25,044 INFO L226 Difference]: Without dead ends: 150 [2019-10-01 22:43:25,045 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:43:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-01 22:43:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2019-10-01 22:43:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-01 22:43:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2019-10-01 22:43:25,056 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 127 [2019-10-01 22:43:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:25,057 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2019-10-01 22:43:25,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 22:43:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2019-10-01 22:43:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-01 22:43:25,058 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:25,059 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:25,059 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1347208894, now seen corresponding path program 11 times [2019-10-01 22:43:25,060 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:25,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:25,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:25,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:25,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2019-10-01 22:43:25,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:25,240 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:43:25,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:44:46,888 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-01 22:44:46,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:44:46,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 22:44:46,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:44:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2019-10-01 22:44:46,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:44:46,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-01 22:44:46,992 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 22:44:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 22:44:46,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:44:46,993 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand 14 states. [2019-10-01 22:44:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:44:47,197 INFO L93 Difference]: Finished difference Result 258 states and 273 transitions. [2019-10-01 22:44:47,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 22:44:47,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 139 [2019-10-01 22:44:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:44:47,202 INFO L225 Difference]: With dead ends: 258 [2019-10-01 22:44:47,202 INFO L226 Difference]: Without dead ends: 159 [2019-10-01 22:44:47,203 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:44:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-01 22:44:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2019-10-01 22:44:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-10-01 22:44:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2019-10-01 22:44:47,210 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 139 [2019-10-01 22:44:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:44:47,210 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2019-10-01 22:44:47,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 22:44:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2019-10-01 22:44:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-01 22:44:47,212 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:44:47,212 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:44:47,213 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:44:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:44:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash -384352744, now seen corresponding path program 12 times [2019-10-01 22:44:47,213 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:44:47,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:44:47,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:47,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:44:47,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-10-01 22:44:47,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:44:47,423 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:44:47,459 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:45:34,493 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-10-01 22:45:34,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:45:34,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:45:34,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:45:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-10-01 22:45:34,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:45:34,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-01 22:45:34,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-01 22:45:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-01 22:45:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 22:45:34,564 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 15 states. [2019-10-01 22:45:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:45:34,803 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2019-10-01 22:45:34,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 22:45:34,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2019-10-01 22:45:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:45:34,806 INFO L225 Difference]: With dead ends: 276 [2019-10-01 22:45:34,806 INFO L226 Difference]: Without dead ends: 169 [2019-10-01 22:45:34,807 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 22:45:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-01 22:45:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2019-10-01 22:45:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-01 22:45:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2019-10-01 22:45:34,814 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 149 [2019-10-01 22:45:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:45:34,815 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2019-10-01 22:45:34,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-01 22:45:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2019-10-01 22:45:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-01 22:45:34,816 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:45:34,817 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:45:34,817 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:45:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:45:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2086563694, now seen corresponding path program 13 times [2019-10-01 22:45:34,817 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:45:34,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:45:34,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:45:34,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:45:34,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:45:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:45:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2019-10-01 22:45:35,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:45:35,017 INFO L224 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) [2019-10-01 22:45:35,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:45:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:45:35,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 22:45:35,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:45:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-10-01 22:45:35,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:45:35,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-10-01 22:45:35,383 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 22:45:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 22:45:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:45:35,384 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 24 states. [2019-10-01 22:45:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:45:35,725 INFO L93 Difference]: Finished difference Result 323 states and 340 transitions. [2019-10-01 22:45:35,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-01 22:45:35,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 159 [2019-10-01 22:45:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:45:35,728 INFO L225 Difference]: With dead ends: 323 [2019-10-01 22:45:35,728 INFO L226 Difference]: Without dead ends: 182 [2019-10-01 22:45:35,729 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:45:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-01 22:45:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2019-10-01 22:45:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-10-01 22:45:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2019-10-01 22:45:35,736 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 159 [2019-10-01 22:45:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:45:35,737 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2019-10-01 22:45:35,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 22:45:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2019-10-01 22:45:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-01 22:45:35,738 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:45:35,738 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:45:35,739 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:45:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:45:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1845418978, now seen corresponding path program 14 times [2019-10-01 22:45:35,739 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:45:35,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:45:35,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:45:35,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:45:35,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:45:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:45:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2019-10-01 22:45:36,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:45:36,049 INFO L224 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 [2019-10-01 22:45:36,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:45:36,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:45:36,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:45:36,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 22:45:36,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:45:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2019-10-01 22:45:36,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:45:36,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-10-01 22:45:36,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 22:45:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 22:45:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:45:36,356 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 26 states. [2019-10-01 22:45:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:45:36,708 INFO L93 Difference]: Finished difference Result 345 states and 362 transitions. [2019-10-01 22:45:36,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 22:45:36,708 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 171 [2019-10-01 22:45:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:45:36,710 INFO L225 Difference]: With dead ends: 345 [2019-10-01 22:45:36,710 INFO L226 Difference]: Without dead ends: 194 [2019-10-01 22:45:36,711 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:45:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-10-01 22:45:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2019-10-01 22:45:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-10-01 22:45:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 194 transitions. [2019-10-01 22:45:36,719 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 194 transitions. Word has length 171 [2019-10-01 22:45:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:45:36,719 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 194 transitions. [2019-10-01 22:45:36,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 22:45:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 194 transitions. [2019-10-01 22:45:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-01 22:45:36,720 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:45:36,721 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:45:36,721 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:45:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:45:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 32311894, now seen corresponding path program 15 times [2019-10-01 22:45:36,722 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:45:36,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:45:36,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:45:36,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:45:36,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:45:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:45:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2019-10-01 22:45:37,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:45:37,083 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:45:37,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:46:19,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-01 22:46:19,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:46:19,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-01 22:46:19,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:46:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2019-10-01 22:46:20,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:46:20,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-10-01 22:46:20,063 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 22:46:20,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 22:46:20,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:46:20,064 INFO L87 Difference]: Start difference. First operand 188 states and 194 transitions. Second operand 28 states. [2019-10-01 22:46:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:46:20,480 INFO L93 Difference]: Finished difference Result 367 states and 384 transitions. [2019-10-01 22:46:20,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 22:46:20,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 183 [2019-10-01 22:46:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:46:20,481 INFO L225 Difference]: With dead ends: 367 [2019-10-01 22:46:20,482 INFO L226 Difference]: Without dead ends: 206 [2019-10-01 22:46:20,483 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:46:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-10-01 22:46:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2019-10-01 22:46:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-10-01 22:46:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 206 transitions. [2019-10-01 22:46:20,491 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 206 transitions. Word has length 183 [2019-10-01 22:46:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:46:20,491 INFO L475 AbstractCegarLoop]: Abstraction has 200 states and 206 transitions. [2019-10-01 22:46:20,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 22:46:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 206 transitions. [2019-10-01 22:46:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-01 22:46:20,492 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:46:20,493 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:46:20,493 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:46:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:46:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1212548406, now seen corresponding path program 16 times [2019-10-01 22:46:20,493 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:46:20,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:46:20,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:46:20,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:46:20,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:46:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:46:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2019-10-01 22:46:20,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:46:20,867 INFO L224 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 [2019-10-01 22:46:20,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:46:21,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:46:21,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:46:21,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:46:21,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:46:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2019-10-01 22:46:21,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:46:21,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-10-01 22:46:21,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 22:46:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 22:46:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2019-10-01 22:46:21,341 INFO L87 Difference]: Start difference. First operand 200 states and 206 transitions. Second operand 30 states. [2019-10-01 22:46:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:46:21,780 INFO L93 Difference]: Finished difference Result 389 states and 406 transitions. [2019-10-01 22:46:21,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-01 22:46:21,780 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 195 [2019-10-01 22:46:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:46:21,782 INFO L225 Difference]: With dead ends: 389 [2019-10-01 22:46:21,782 INFO L226 Difference]: Without dead ends: 218 [2019-10-01 22:46:21,783 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2019-10-01 22:46:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-01 22:46:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2019-10-01 22:46:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-01 22:46:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 218 transitions. [2019-10-01 22:46:21,791 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 218 transitions. Word has length 195 [2019-10-01 22:46:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:46:21,791 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 218 transitions. [2019-10-01 22:46:21,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 22:46:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 218 transitions. [2019-10-01 22:46:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-01 22:46:21,793 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:46:21,793 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:46:21,793 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:46:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:46:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash -629756610, now seen corresponding path program 17 times [2019-10-01 22:46:21,794 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:46:21,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:46:21,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:46:21,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:46:21,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:46:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:46:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1168 trivial. 0 not checked. [2019-10-01 22:46:22,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:46:22,341 INFO L224 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 [2019-10-01 22:46:22,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:48:49,526 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-01 22:48:49,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:48:49,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:48:49,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:48:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1168 trivial. 0 not checked. [2019-10-01 22:48:49,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:48:49,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-01 22:48:49,713 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 22:48:49,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 22:48:49,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:48:49,714 INFO L87 Difference]: Start difference. First operand 212 states and 218 transitions. Second operand 20 states. [2019-10-01 22:48:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:48:50,172 INFO L93 Difference]: Finished difference Result 374 states and 389 transitions. [2019-10-01 22:48:50,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 22:48:50,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2019-10-01 22:48:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:48:50,175 INFO L225 Difference]: With dead ends: 374 [2019-10-01 22:48:50,175 INFO L226 Difference]: Without dead ends: 227 [2019-10-01 22:48:50,176 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:48:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-10-01 22:48:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 222. [2019-10-01 22:48:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-10-01 22:48:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2019-10-01 22:48:50,189 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 207 [2019-10-01 22:48:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:48:50,189 INFO L475 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2019-10-01 22:48:50,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 22:48:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2019-10-01 22:48:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-01 22:48:50,192 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:48:50,193 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:48:50,193 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:48:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:48:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash 784295700, now seen corresponding path program 18 times [2019-10-01 22:48:50,194 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:48:50,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:48:50,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:48:50,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:48:50,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:48:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:48:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2019-10-01 22:48:50,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:48:50,645 INFO L224 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 [2019-10-01 22:48:50,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:50:56,840 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-10-01 22:50:56,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:50:56,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 22:50:56,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:50:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 33 proven. 289 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2019-10-01 22:50:56,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:50:56,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 23 [2019-10-01 22:50:56,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 22:50:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 22:50:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:50:56,992 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand 23 states. [2019-10-01 22:50:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:50:57,406 INFO L93 Difference]: Finished difference Result 397 states and 417 transitions. [2019-10-01 22:50:57,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-01 22:50:57,407 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 217 [2019-10-01 22:50:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:50:57,409 INFO L225 Difference]: With dead ends: 397 [2019-10-01 22:50:57,409 INFO L226 Difference]: Without dead ends: 242 [2019-10-01 22:50:57,411 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:50:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-10-01 22:50:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2019-10-01 22:50:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-10-01 22:50:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 248 transitions. [2019-10-01 22:50:57,419 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 248 transitions. Word has length 217 [2019-10-01 22:50:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:50:57,419 INFO L475 AbstractCegarLoop]: Abstraction has 242 states and 248 transitions. [2019-10-01 22:50:57,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 22:50:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 248 transitions. [2019-10-01 22:50:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-01 22:50:57,421 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:50:57,421 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:50:57,421 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:50:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:50:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash 404357184, now seen corresponding path program 19 times [2019-10-01 22:50:57,422 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:50:57,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:50:57,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:57,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:50:57,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:50:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2019-10-01 22:50:58,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:50:58,111 INFO L224 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 [2019-10-01 22:50:58,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:50:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:50:58,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:50:58,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:50:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2019-10-01 22:50:58,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:50:58,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 35 [2019-10-01 22:50:58,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-01 22:50:58,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-01 22:50:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:50:58,615 INFO L87 Difference]: Start difference. First operand 242 states and 248 transitions. Second operand 35 states. [2019-10-01 22:50:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:50:59,114 INFO L93 Difference]: Finished difference Result 471 states and 488 transitions. [2019-10-01 22:50:59,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-01 22:50:59,124 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 237 [2019-10-01 22:50:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:50:59,126 INFO L225 Difference]: With dead ends: 471 [2019-10-01 22:50:59,126 INFO L226 Difference]: Without dead ends: 260 [2019-10-01 22:50:59,127 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:50:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-10-01 22:50:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2019-10-01 22:50:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2019-10-01 22:50:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 260 transitions. [2019-10-01 22:50:59,136 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 260 transitions. Word has length 237 [2019-10-01 22:50:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:50:59,136 INFO L475 AbstractCegarLoop]: Abstraction has 254 states and 260 transitions. [2019-10-01 22:50:59,136 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-01 22:50:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 260 transitions. [2019-10-01 22:50:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-10-01 22:50:59,138 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:50:59,138 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:50:59,138 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:50:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:50:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash 665285044, now seen corresponding path program 20 times [2019-10-01 22:50:59,139 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:50:59,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:50:59,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:59,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:50:59,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:50:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2019-10-01 22:50:59,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:50:59,581 INFO L224 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 [2019-10-01 22:50:59,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:50:59,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:50:59,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:50:59,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 22:50:59,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:50:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:50:59,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:50:59,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-01 22:50:59,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 22:50:59,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 22:50:59,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 22:50:59,800 INFO L87 Difference]: Start difference. First operand 254 states and 260 transitions. Second operand 17 states. [2019-10-01 22:50:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:50:59,858 INFO L93 Difference]: Finished difference Result 478 states and 490 transitions. [2019-10-01 22:50:59,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 22:50:59,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 249 [2019-10-01 22:50:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:50:59,860 INFO L225 Difference]: With dead ends: 478 [2019-10-01 22:50:59,860 INFO L226 Difference]: Without dead ends: 257 [2019-10-01 22:50:59,861 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 22:50:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-10-01 22:50:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2019-10-01 22:50:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-10-01 22:50:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2019-10-01 22:50:59,871 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 249 [2019-10-01 22:50:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:50:59,872 INFO L475 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2019-10-01 22:50:59,872 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 22:50:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2019-10-01 22:50:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-01 22:50:59,873 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:50:59,874 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:50:59,874 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:50:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:50:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash 324678738, now seen corresponding path program 21 times [2019-10-01 22:50:59,875 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:50:59,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:50:59,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:59,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:50:59,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:51:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1796 trivial. 0 not checked. [2019-10-01 22:51:00,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:51:00,321 INFO L224 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 [2019-10-01 22:51:00,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:52:30,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-01 22:52:30,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:52:30,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 22:52:30,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:52:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2019-10-01 22:52:31,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:52:31,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 38 [2019-10-01 22:52:31,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-01 22:52:31,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-01 22:52:31,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1018, Unknown=0, NotChecked=0, Total=1406 [2019-10-01 22:52:31,163 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand 38 states. [2019-10-01 22:52:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:52:31,756 INFO L93 Difference]: Finished difference Result 495 states and 512 transitions. [2019-10-01 22:52:31,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-01 22:52:31,756 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 251 [2019-10-01 22:52:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:52:31,759 INFO L225 Difference]: With dead ends: 495 [2019-10-01 22:52:31,759 INFO L226 Difference]: Without dead ends: 274 [2019-10-01 22:52:31,761 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=1018, Unknown=0, NotChecked=0, Total=1406 [2019-10-01 22:52:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-10-01 22:52:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2019-10-01 22:52:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-10-01 22:52:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2019-10-01 22:52:31,769 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 251 [2019-10-01 22:52:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:52:31,770 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2019-10-01 22:52:31,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-01 22:52:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2019-10-01 22:52:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-10-01 22:52:31,771 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:52:31,772 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:52:31,772 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:52:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:52:31,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1080235322, now seen corresponding path program 22 times [2019-10-01 22:52:31,772 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:52:31,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:52:31,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:52:31,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:52:31,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:52:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:52:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2430 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1989 trivial. 0 not checked. [2019-10-01 22:52:32,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:52:32,285 INFO L224 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 [2019-10-01 22:52:32,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:52:32,435 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:52:32,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:52:32,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 22:52:32,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:52:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2430 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:52:32,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:52:32,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 40 [2019-10-01 22:52:32,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-01 22:52:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-01 22:52:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2019-10-01 22:52:32,785 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand 40 states. [2019-10-01 22:52:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:52:33,446 INFO L93 Difference]: Finished difference Result 517 states and 534 transitions. [2019-10-01 22:52:33,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-01 22:52:33,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 263 [2019-10-01 22:52:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:52:33,448 INFO L225 Difference]: With dead ends: 517 [2019-10-01 22:52:33,448 INFO L226 Difference]: Without dead ends: 286 [2019-10-01 22:52:33,450 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2019-10-01 22:52:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-01 22:52:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2019-10-01 22:52:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-10-01 22:52:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 286 transitions. [2019-10-01 22:52:33,458 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 286 transitions. Word has length 263 [2019-10-01 22:52:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:52:33,459 INFO L475 AbstractCegarLoop]: Abstraction has 280 states and 286 transitions. [2019-10-01 22:52:33,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-01 22:52:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 286 transitions. [2019-10-01 22:52:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-10-01 22:52:33,462 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:52:33,463 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:52:33,463 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:52:33,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:52:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash 942564154, now seen corresponding path program 23 times [2019-10-01 22:52:33,464 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:52:33,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:52:33,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:52:33,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:52:33,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:52:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:52:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2192 trivial. 0 not checked. [2019-10-01 22:52:34,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:52:34,262 INFO L224 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 [2019-10-01 22:52:34,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:56:13,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-01 22:56:13,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:56:14,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 22:56:14,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:56:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2192 trivial. 0 not checked. [2019-10-01 22:56:14,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:56:14,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-10-01 22:56:14,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 22:56:14,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 22:56:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:56:14,223 INFO L87 Difference]: Start difference. First operand 280 states and 286 transitions. Second operand 26 states. [2019-10-01 22:56:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:56:14,673 INFO L93 Difference]: Finished difference Result 490 states and 505 transitions. [2019-10-01 22:56:14,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 22:56:14,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 275 [2019-10-01 22:56:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:56:14,676 INFO L225 Difference]: With dead ends: 490 [2019-10-01 22:56:14,676 INFO L226 Difference]: Without dead ends: 295 [2019-10-01 22:56:14,677 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:56:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-10-01 22:56:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 290. [2019-10-01 22:56:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-10-01 22:56:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 296 transitions. [2019-10-01 22:56:14,684 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 296 transitions. Word has length 275 [2019-10-01 22:56:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:56:14,685 INFO L475 AbstractCegarLoop]: Abstraction has 290 states and 296 transitions. [2019-10-01 22:56:14,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 22:56:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 296 transitions. [2019-10-01 22:56:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-01 22:56:14,687 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:56:14,687 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:56:14,687 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:56:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:56:14,688 INFO L82 PathProgramCache]: Analyzing trace with hash 546394640, now seen corresponding path program 24 times [2019-10-01 22:56:14,688 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:56:14,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:56:14,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:56:14,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:56:14,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:56:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:56:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2901 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2372 trivial. 0 not checked. [2019-10-01 22:56:15,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:56:15,332 INFO L224 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 [2019-10-01 22:56:15,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE