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_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:09,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:09,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:09,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:09,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:09,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:09,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:09,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:09,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:09,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:09,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:09,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:09,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:09,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:09,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:09,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:09,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:09,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:09,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:09,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:09,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:09,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:09,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:09,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:09,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:09,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:59:09,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:59:09,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:59:09,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:59:09,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:59:09,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:59:09,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:59:09,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:59:09,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:09,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:09,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:09,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:59:09,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:09,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:09,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:09,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:09,891 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:09,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:09,891 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:09,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:09,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:09,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:09,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:09,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:09,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:09,892 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:09,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:09,893 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:09,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:09,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:09,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:09,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:09,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:09,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:09,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:09,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:09,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:09,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:09,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:09,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:09,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:09,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:09,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:09,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:09,940 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:09,940 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:09,941 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-09-20 12:59:09,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26dab230/b29bfbb4c62946e590e416195b1f9c70/FLAGc7f60a8f2 [2019-09-20 12:59:10,488 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:10,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-09-20 12:59:10,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26dab230/b29bfbb4c62946e590e416195b1f9c70/FLAGc7f60a8f2 [2019-09-20 12:59:10,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26dab230/b29bfbb4c62946e590e416195b1f9c70 [2019-09-20 12:59:10,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:10,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:10,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:10,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:10,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:10,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:10" (1/1) ... [2019-09-20 12:59:10,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da53205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:10, skipping insertion in model container [2019-09-20 12:59:10,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:10" (1/1) ... [2019-09-20 12:59:10,871 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:10,887 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:11,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:11,088 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:11,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:11,144 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:11,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11 WrapperNode [2019-09-20 12:59:11,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:11,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:11,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:11,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:11,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... [2019-09-20 12:59:11,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:11,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:11,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:11,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:11,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:59:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:11,610 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:11,610 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 12:59:11,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:11 BoogieIcfgContainer [2019-09-20 12:59:11,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:11,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:11,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:11,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:11,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:10" (1/3) ... [2019-09-20 12:59:11,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3411a30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:11, skipping insertion in model container [2019-09-20 12:59:11,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:11" (2/3) ... [2019-09-20 12:59:11,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3411a30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:11, skipping insertion in model container [2019-09-20 12:59:11,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:11" (3/3) ... [2019-09-20 12:59:11,620 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-09-20 12:59:11,632 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:11,639 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:11,657 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:11,692 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:11,693 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:11,693 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:11,693 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:11,693 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:11,693 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:11,693 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:11,694 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:11,694 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-20 12:59:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:11,729 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:11,730 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:11,731 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-09-20 12:59:11,738 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:11,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:11,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:11,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:11,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:11,855 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:11,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:59:11,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:59:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:59:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:11,870 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-20 12:59:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:11,891 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-09-20 12:59:11,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:59:11,892 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-20 12:59:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:11,900 INFO L225 Difference]: With dead ends: 56 [2019-09-20 12:59:11,901 INFO L226 Difference]: Without dead ends: 27 [2019-09-20 12:59:11,904 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-20 12:59:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-20 12:59:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:59:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-20 12:59:11,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-09-20 12:59:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:11,943 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-20 12:59:11,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:59:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-20 12:59:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:11,944 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:11,945 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:11,945 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:11,945 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-09-20 12:59:11,946 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:11,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:11,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:11,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:11,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:11,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:11,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:12,000 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:12,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:12,001 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-20 12:59:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:12,046 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-09-20 12:59:12,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:12,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-20 12:59:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:12,048 INFO L225 Difference]: With dead ends: 48 [2019-09-20 12:59:12,049 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:12,050 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-20 12:59:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 12:59:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-20 12:59:12,058 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-09-20 12:59:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:12,058 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-20 12:59:12,059 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-20 12:59:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 12:59:12,060 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:12,060 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:12,066 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-09-20 12:59:12,067 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:12,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:12,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:12,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:12,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:12,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:12,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 12:59:12,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:59:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:59:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:12,168 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-09-20 12:59:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:12,237 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-09-20 12:59:12,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:59:12,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-20 12:59:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:12,239 INFO L225 Difference]: With dead ends: 46 [2019-09-20 12:59:12,239 INFO L226 Difference]: Without dead ends: 33 [2019-09-20 12:59:12,239 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-20 12:59:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-09-20 12:59:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:59:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-20 12:59:12,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-09-20 12:59:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:12,246 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-20 12:59:12,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:59:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-20 12:59:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 12:59:12,248 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:12,248 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:12,248 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-09-20 12:59:12,249 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:12,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:12,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:12,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:12,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:12,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:12,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:59:12,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:59:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:59:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:12,341 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-09-20 12:59:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:12,490 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-09-20 12:59:12,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:12,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-09-20 12:59:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:12,492 INFO L225 Difference]: With dead ends: 62 [2019-09-20 12:59:12,492 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 12:59:12,495 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 12:59:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-09-20 12:59:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-20 12:59:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-09-20 12:59:12,508 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-09-20 12:59:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:12,510 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-09-20 12:59:12,510 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:59:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-09-20 12:59:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:59:12,511 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:12,511 INFO L407 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] [2019-09-20 12:59:12,512 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-09-20 12:59:12,513 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:12,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:12,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:12,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:12,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:59:12,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:12,653 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 [2019-09-20 12:59:12,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:12,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:12,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 12:59:12,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:12,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-20 12:59:12,786 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:59:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:59:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:59:12,789 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2019-09-20 12:59:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:13,075 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-09-20 12:59:13,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-20 12:59:13,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-09-20 12:59:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:13,078 INFO L225 Difference]: With dead ends: 86 [2019-09-20 12:59:13,078 INFO L226 Difference]: Without dead ends: 62 [2019-09-20 12:59:13,079 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-09-20 12:59:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-20 12:59:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2019-09-20 12:59:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-20 12:59:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-09-20 12:59:13,088 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2019-09-20 12:59:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:13,089 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-09-20 12:59:13,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:59:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-09-20 12:59:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:59:13,090 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:13,090 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:13,090 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1076752728, now seen corresponding path program 2 times [2019-09-20 12:59:13,091 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:13,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:13,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:13,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:13,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-20 12:59:13,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:13,273 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 [2019-09-20 12:59:13,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:13,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:13,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:13,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:59:13,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 12:59:13,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:13,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2019-09-20 12:59:13,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-20 12:59:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-20 12:59:13,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-20 12:59:13,364 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 12 states. [2019-09-20 12:59:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:13,736 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2019-09-20 12:59:13,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-20 12:59:13,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2019-09-20 12:59:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:13,739 INFO L225 Difference]: With dead ends: 145 [2019-09-20 12:59:13,739 INFO L226 Difference]: Without dead ends: 116 [2019-09-20 12:59:13,742 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-09-20 12:59:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-20 12:59:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2019-09-20 12:59:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-20 12:59:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2019-09-20 12:59:13,776 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 34 [2019-09-20 12:59:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:13,778 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2019-09-20 12:59:13,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-20 12:59:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2019-09-20 12:59:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-20 12:59:13,782 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:13,782 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:13,783 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1104086922, now seen corresponding path program 1 times [2019-09-20 12:59:13,784 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:13,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:13,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:13,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:13,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-20 12:59:13,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:13,943 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:13,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 12:59:14,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 12:59:14,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:14,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-20 12:59:14,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-20 12:59:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-20 12:59:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-20 12:59:14,086 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 12 states. [2019-09-20 12:59:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:14,374 INFO L93 Difference]: Finished difference Result 178 states and 250 transitions. [2019-09-20 12:59:14,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-20 12:59:14,376 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-09-20 12:59:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:14,378 INFO L225 Difference]: With dead ends: 178 [2019-09-20 12:59:14,378 INFO L226 Difference]: Without dead ends: 130 [2019-09-20 12:59:14,382 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-09-20 12:59:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-20 12:59:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 51. [2019-09-20 12:59:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-20 12:59:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-09-20 12:59:14,393 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 36 [2019-09-20 12:59:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:14,394 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-09-20 12:59:14,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-20 12:59:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-09-20 12:59:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-20 12:59:14,395 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,395 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,396 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1653847887, now seen corresponding path program 3 times [2019-09-20 12:59:14,396 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-20 12:59:14,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:14,523 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 [2019-09-20 12:59:14,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:14,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-20 12:59:14,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:14,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:59:14,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:14,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:14,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:14,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2019-09-20 12:59:14,639 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 12:59:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 12:59:14,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-20 12:59:14,640 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 13 states. [2019-09-20 12:59:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,083 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2019-09-20 12:59:15,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-20 12:59:15,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-09-20 12:59:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,088 INFO L225 Difference]: With dead ends: 160 [2019-09-20 12:59:15,088 INFO L226 Difference]: Without dead ends: 147 [2019-09-20 12:59:15,089 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-09-20 12:59:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-09-20 12:59:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2019-09-20 12:59:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-20 12:59:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2019-09-20 12:59:15,125 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 41 [2019-09-20 12:59:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,129 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2019-09-20 12:59:15,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 12:59:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2019-09-20 12:59:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-20 12:59:15,130 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,130 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,131 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,134 INFO L82 PathProgramCache]: Analyzing trace with hash -510083147, now seen corresponding path program 1 times [2019-09-20 12:59:15,134 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:15,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-20 12:59:15,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,275 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 [2019-09-20 12:59:15,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 12:59:15,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-20 12:59:15,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:15,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2019-09-20 12:59:15,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-20 12:59:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-20 12:59:15,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-09-20 12:59:15,393 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 12 states. [2019-09-20 12:59:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,709 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2019-09-20 12:59:15,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-20 12:59:15,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-09-20 12:59:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,712 INFO L225 Difference]: With dead ends: 366 [2019-09-20 12:59:15,712 INFO L226 Difference]: Without dead ends: 298 [2019-09-20 12:59:15,713 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2019-09-20 12:59:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-09-20 12:59:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 93. [2019-09-20 12:59:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-20 12:59:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2019-09-20 12:59:15,728 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 44 [2019-09-20 12:59:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,728 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2019-09-20 12:59:15,728 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-20 12:59:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2019-09-20 12:59:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-20 12:59:15,730 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,730 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,730 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash -396829064, now seen corresponding path program 2 times [2019-09-20 12:59:15,731 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:15,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-09-20 12:59:15,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,852 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 [2019-09-20 12:59:15,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:15,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:15,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:15,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 12:59:15,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-09-20 12:59:15,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:15,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-09-20 12:59:15,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-20 12:59:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-20 12:59:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-09-20 12:59:15,998 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand 17 states. [2019-09-20 12:59:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:16,906 INFO L93 Difference]: Finished difference Result 454 states and 670 transitions. [2019-09-20 12:59:16,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-20 12:59:16,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2019-09-20 12:59:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:16,908 INFO L225 Difference]: With dead ends: 454 [2019-09-20 12:59:16,909 INFO L226 Difference]: Without dead ends: 269 [2019-09-20 12:59:16,911 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=2040, Unknown=0, NotChecked=0, Total=2756 [2019-09-20 12:59:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-09-20 12:59:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 105. [2019-09-20 12:59:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-20 12:59:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2019-09-20 12:59:16,928 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 49 [2019-09-20 12:59:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:16,928 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2019-09-20 12:59:16,928 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-20 12:59:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2019-09-20 12:59:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-20 12:59:16,930 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:16,930 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:16,930 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -611115395, now seen corresponding path program 4 times [2019-09-20 12:59:16,931 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:16,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:16,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:16,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-20 12:59:17,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:17,031 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:17,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:59:17,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:59:17,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:17,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 12:59:17,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Stream closed [2019-09-20 12:59:17,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:17,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-09-20 12:59:17,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-20 12:59:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-20 12:59:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-09-20 12:59:17,248 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 18 states. [2019-09-20 12:59:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:18,320 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2019-09-20 12:59:18,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-20 12:59:18,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2019-09-20 12:59:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:18,323 INFO L225 Difference]: With dead ends: 350 [2019-09-20 12:59:18,323 INFO L226 Difference]: Without dead ends: 266 [2019-09-20 12:59:18,325 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=734, Invalid=1716, Unknown=0, NotChecked=0, Total=2450 [2019-09-20 12:59:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-20 12:59:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 114. [2019-09-20 12:59:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-20 12:59:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2019-09-20 12:59:18,341 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 63 [2019-09-20 12:59:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:18,341 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2019-09-20 12:59:18,341 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-20 12:59:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2019-09-20 12:59:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-20 12:59:18,342 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:18,343 INFO L407 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:18,343 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash 215199622, now seen corresponding path program 5 times [2019-09-20 12:59:18,343 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:18,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:18,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:18,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:18,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 119 proven. 507 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-20 12:59:18,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:18,827 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 [2019-09-20 12:59:18,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-20 12:59:18,888 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-20 12:59:18,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:18,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 12:59:18,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:19,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 436 proven. 55 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:19,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:19,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 37 [2019-09-20 12:59:19,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-20 12:59:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-20 12:59:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2019-09-20 12:59:19,070 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand 37 states. [2019-09-20 12:59:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:22,752 INFO L93 Difference]: Finished difference Result 513 states and 733 transitions. [2019-09-20 12:59:22,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-20 12:59:22,752 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2019-09-20 12:59:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:22,758 INFO L225 Difference]: With dead ends: 513 [2019-09-20 12:59:22,759 INFO L226 Difference]: Without dead ends: 419 [2019-09-20 12:59:22,764 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2557, Invalid=10553, Unknown=0, NotChecked=0, Total=13110 [2019-09-20 12:59:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-09-20 12:59:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2019-09-20 12:59:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-20 12:59:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2019-09-20 12:59:22,786 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 107 [2019-09-20 12:59:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:22,786 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2019-09-20 12:59:22,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-20 12:59:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2019-09-20 12:59:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-20 12:59:22,788 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:22,789 INFO L407 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:22,789 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1872470850, now seen corresponding path program 6 times [2019-09-20 12:59:22,789 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:22,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:22,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:22,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:22,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 20 proven. 1198 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-09-20 12:59:22,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:22,993 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 [2019-09-20 12:59:23,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-20 12:59:23,116 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-20 12:59:23,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:23,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:59:23,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:23,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1204 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-20 12:59:23,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:23,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 18 [2019-09-20 12:59:23,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-20 12:59:23,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-20 12:59:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-09-20 12:59:23,212 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand 18 states. [2019-09-20 12:59:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:24,104 INFO L93 Difference]: Finished difference Result 331 states and 424 transitions. [2019-09-20 12:59:24,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-20 12:59:24,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2019-09-20 12:59:24,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:24,108 INFO L225 Difference]: With dead ends: 331 [2019-09-20 12:59:24,108 INFO L226 Difference]: Without dead ends: 318 [2019-09-20 12:59:24,110 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2019-09-20 12:59:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-09-20 12:59:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2019-09-20 12:59:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-09-20 12:59:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2019-09-20 12:59:24,142 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 137 [2019-09-20 12:59:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:24,143 INFO L475 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2019-09-20 12:59:24,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-20 12:59:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2019-09-20 12:59:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-20 12:59:24,146 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:24,146 INFO L407 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:24,146 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:24,147 INFO L82 PathProgramCache]: Analyzing trace with hash 586009211, now seen corresponding path program 7 times [2019-09-20 12:59:24,147 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:24,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:24,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:24,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 672 proven. 159 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2019-09-20 12:59:24,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:24,360 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 [2019-09-20 12:59:24,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:24,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:59:24,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2157 trivial. 0 not checked. [2019-09-20 12:59:24,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:24,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-09-20 12:59:24,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-20 12:59:24,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-20 12:59:24,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2019-09-20 12:59:24,678 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand 24 states. [2019-09-20 12:59:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:26,724 INFO L93 Difference]: Finished difference Result 487 states and 638 transitions. [2019-09-20 12:59:26,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-20 12:59:26,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 161 [2019-09-20 12:59:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:26,727 INFO L225 Difference]: With dead ends: 487 [2019-09-20 12:59:26,728 INFO L226 Difference]: Without dead ends: 281 [2019-09-20 12:59:26,731 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2104, Invalid=4868, Unknown=0, NotChecked=0, Total=6972 [2019-09-20 12:59:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-09-20 12:59:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 234. [2019-09-20 12:59:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-09-20 12:59:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2019-09-20 12:59:26,752 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 161 [2019-09-20 12:59:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:26,752 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2019-09-20 12:59:26,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-20 12:59:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2019-09-20 12:59:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-20 12:59:26,755 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:26,755 INFO L407 BasicCegarLoop]: trace histogram [36, 36, 36, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:26,755 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -635882284, now seen corresponding path program 8 times [2019-09-20 12:59:26,756 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:26,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:26,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:26,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:26,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 23 proven. 1975 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-09-20 12:59:26,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:26,968 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:26,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:27,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:27,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:27,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 12:59:27,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2019-09-20 12:59:27,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:27,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 19 [2019-09-20 12:59:27,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-20 12:59:27,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-20 12:59:27,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-09-20 12:59:27,146 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand 19 states. [2019-09-20 12:59:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:28,175 INFO L93 Difference]: Finished difference Result 573 states and 748 transitions. [2019-09-20 12:59:28,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-20 12:59:28,175 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 166 [2019-09-20 12:59:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:28,178 INFO L225 Difference]: With dead ends: 573 [2019-09-20 12:59:28,178 INFO L226 Difference]: Without dead ends: 364 [2019-09-20 12:59:28,183 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=824, Invalid=2256, Unknown=0, NotChecked=0, Total=3080 [2019-09-20 12:59:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-09-20 12:59:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 260. [2019-09-20 12:59:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-20 12:59:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 336 transitions. [2019-09-20 12:59:28,211 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 336 transitions. Word has length 166 [2019-09-20 12:59:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:28,211 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 336 transitions. [2019-09-20 12:59:28,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-20 12:59:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 336 transitions. [2019-09-20 12:59:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-09-20 12:59:28,214 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:28,214 INFO L407 BasicCegarLoop]: trace histogram [43, 43, 43, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:28,214 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1028235619, now seen corresponding path program 9 times [2019-09-20 12:59:28,215 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:28,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:28,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:28,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:28,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 1115 proven. 1903 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-09-20 12:59:28,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:28,759 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:28,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:28,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-20 12:59:28,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:28,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 12:59:28,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:28,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 964 proven. 92 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2019-09-20 12:59:29,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:29,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14] total 40 [2019-09-20 12:59:29,070 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-20 12:59:29,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-20 12:59:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2019-09-20 12:59:29,071 INFO L87 Difference]: Start difference. First operand 260 states and 336 transitions. Second operand 40 states.