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_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:02,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:02,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:02,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:02,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:02,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:02,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:02,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:02,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:02,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:02,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:02,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:02,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:02,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:02,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:02,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:02,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:02,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:02,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:02,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:02,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:02,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:02,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:02,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:02,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:02,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:02,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:02,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:02,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:46:02,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:02,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:02,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:02,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:02,728 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:02,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:02,729 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:02,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:02,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:02,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:02,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:02,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:02,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:02,733 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:02,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:02,734 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:02,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:02,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:02,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:02,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:02,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:02,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:02,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:02,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:02,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:02,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:02,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:02,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:02,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:03,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:03,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:03,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:03,072 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:03,072 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:03,073 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-10-14 21:46:03,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79157b2b6/afef5d07df5441058c782f3b819aa1dc/FLAGbc04b4647 [2019-10-14 21:46:03,664 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:03,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-10-14 21:46:03,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79157b2b6/afef5d07df5441058c782f3b819aa1dc/FLAGbc04b4647 [2019-10-14 21:46:04,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79157b2b6/afef5d07df5441058c782f3b819aa1dc [2019-10-14 21:46:04,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:04,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:04,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:04,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:04,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:04,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b8a29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04, skipping insertion in model container [2019-10-14 21:46:04,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,052 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:04,074 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:04,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:04,264 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:04,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:04,305 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:04,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04 WrapperNode [2019-10-14 21:46:04,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:04,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:04,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:04,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:04,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:04,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:04,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:04,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:04,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:04,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:04,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:04,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:04,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:04,821 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:04,822 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:46:04,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:04 BoogieIcfgContainer [2019-10-14 21:46:04,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:04,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:04,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:04,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:04,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:04" (1/3) ... [2019-10-14 21:46:04,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c0d1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:04, skipping insertion in model container [2019-10-14 21:46:04,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04" (2/3) ... [2019-10-14 21:46:04,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c0d1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:04, skipping insertion in model container [2019-10-14 21:46:04,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:04" (3/3) ... [2019-10-14 21:46:04,830 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2019-10-14 21:46:04,838 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:04,844 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:04,856 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:04,882 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:04,883 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:04,883 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:04,883 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:04,883 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:04,883 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:04,884 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:04,884 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:46:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:04,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:04,906 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:04,908 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -640162803, now seen corresponding path program 1 times [2019-10-14 21:46:04,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:04,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329872071] [2019-10-14 21:46:04,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:04,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:04,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:05,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329872071] [2019-10-14 21:46:05,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:05,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:05,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985269421] [2019-10-14 21:46:05,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:05,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:05,127 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:46:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:05,305 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2019-10-14 21:46:05,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:05,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:46:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:05,320 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:46:05,321 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:46:05,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:46:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:46:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:46:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:46:05,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-14 21:46:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:05,388 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:46:05,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:46:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:05,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,392 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,393 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2068442237, now seen corresponding path program 1 times [2019-10-14 21:46:05,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726393469] [2019-10-14 21:46:05,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:05,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726393469] [2019-10-14 21:46:05,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:05,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:05,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353362137] [2019-10-14 21:46:05,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:05,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:05,550 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:46:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:05,660 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:46:05,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:05,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:05,663 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:46:05,663 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:46:05,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:46:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:46:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 21:46:05,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-14 21:46:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:05,679 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 21:46:05,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 21:46:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:46:05,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,682 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,683 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1850093537, now seen corresponding path program 1 times [2019-10-14 21:46:05,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818633323] [2019-10-14 21:46:05,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:05,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818633323] [2019-10-14 21:46:05,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:05,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:05,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014647356] [2019-10-14 21:46:05,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:05,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:05,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:05,799 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-14 21:46:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:05,893 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-10-14 21:46:05,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:05,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:46:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:05,895 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:46:05,895 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:46:05,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:46:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-14 21:46:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 21:46:05,903 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-10-14 21:46:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:05,904 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 21:46:05,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 21:46:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:05,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,906 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,906 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash -45207547, now seen corresponding path program 1 times [2019-10-14 21:46:05,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557150820] [2019-10-14 21:46:05,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:46:06,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557150820] [2019-10-14 21:46:06,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41120181] [2019-10-14 21:46:06,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:06,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:46:06,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:06,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:46:06,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707823331] [2019-10-14 21:46:06,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:06,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:06,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:06,148 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2019-10-14 21:46:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,318 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-14 21:46:06,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:06,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-10-14 21:46:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,319 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:46:06,319 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:46:06,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:46:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-10-14 21:46:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:46:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-14 21:46:06,335 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2019-10-14 21:46:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,335 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-14 21:46:06,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-14 21:46:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:46:06,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,338 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,544 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1499586431, now seen corresponding path program 2 times [2019-10-14 21:46:06,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484945218] [2019-10-14 21:46:06,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:46:06,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484945218] [2019-10-14 21:46:06,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868603579] [2019-10-14 21:46:06,672 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:06,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:06,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:06,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:46:06,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:06,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:06,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447424476] [2019-10-14 21:46:06,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:06,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:06,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:06,753 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 7 states. [2019-10-14 21:46:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,836 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-10-14 21:46:06,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:06,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-10-14 21:46:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,838 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:46:06,838 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:46:06,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:46:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-14 21:46:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:46:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-10-14 21:46:06,846 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 32 [2019-10-14 21:46:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,846 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-10-14 21:46:06,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-10-14 21:46:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:46:06,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,848 INFO L380 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] [2019-10-14 21:46:07,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,052 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1436123101, now seen corresponding path program 3 times [2019-10-14 21:46:07,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407078150] [2019-10-14 21:46:07,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:46:07,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407078150] [2019-10-14 21:46:07,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279432253] [2019-10-14 21:46:07,135 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:07,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:46:07,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:46:07,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36889957] [2019-10-14 21:46:07,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:07,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:07,232 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2019-10-14 21:46:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,449 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-10-14 21:46:07,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:07,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-14 21:46:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,451 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:46:07,451 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:46:07,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:46:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2019-10-14 21:46:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:46:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-10-14 21:46:07,460 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 34 [2019-10-14 21:46:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,460 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-10-14 21:46:07,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-10-14 21:46:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:46:07,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,462 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:07,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,666 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1447438805, now seen corresponding path program 4 times [2019-10-14 21:46:07,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542822046] [2019-10-14 21:46:07,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:46:07,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542822046] [2019-10-14 21:46:07,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778580346] [2019-10-14 21:46:07,810 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:07,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:46:07,919 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:46:07,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612319874] [2019-10-14 21:46:07,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:07,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:07,922 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2019-10-14 21:46:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,047 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2019-10-14 21:46:08,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:08,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-10-14 21:46:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,049 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:46:08,049 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:46:08,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:46:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 21:46:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:46:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-10-14 21:46:08,056 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 42 [2019-10-14 21:46:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:08,057 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-10-14 21:46:08,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-10-14 21:46:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:46:08,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:08,058 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:08,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,269 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:08,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1433365683, now seen corresponding path program 5 times [2019-10-14 21:46:08,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:08,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725829483] [2019-10-14 21:46:08,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:46:08,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725829483] [2019-10-14 21:46:08,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925712880] [2019-10-14 21:46:08,396 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:46:08,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:08,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:08,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:46:08,625 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:08,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 21:46:08,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175859789] [2019-10-14 21:46:08,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:08,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:08,627 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 13 states. [2019-10-14 21:46:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,855 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2019-10-14 21:46:08,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:46:08,855 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-10-14 21:46:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,857 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:46:08,857 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:46:08,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:46:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2019-10-14 21:46:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:46:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-10-14 21:46:08,865 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 44 [2019-10-14 21:46:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:08,865 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-10-14 21:46:08,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-10-14 21:46:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:46:08,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:08,867 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,084 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 589786441, now seen corresponding path program 6 times [2019-10-14 21:46:09,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464139877] [2019-10-14 21:46:09,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:09,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464139877] [2019-10-14 21:46:09,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690186342] [2019-10-14 21:46:09,223 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:46:09,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:09,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,341 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:09,342 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:09,345 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:09,345 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:09,346 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-14 21:46:09,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-10-14 21:46:09,419 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:09,431 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:09,433 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-10-14 21:46:09,434 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:38 [2019-10-14 21:46:09,659 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:09,660 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2019-10-14 21:46:09,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:09,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 21:46:09,675 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:09,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:09,679 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:09,679 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:55, output treesize:14 [2019-10-14 21:46:09,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:46:09,780 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-14 21:46:09,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907787170] [2019-10-14 21:46:09,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:46:09,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:46:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:09,782 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 18 states. [2019-10-14 21:46:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:13,125 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2019-10-14 21:46:13,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:46:13,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2019-10-14 21:46:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:13,131 INFO L225 Difference]: With dead ends: 137 [2019-10-14 21:46:13,132 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 21:46:13,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:46:13,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 21:46:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 75. [2019-10-14 21:46:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:46:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-10-14 21:46:13,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 52 [2019-10-14 21:46:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:13,148 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-10-14 21:46:13,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:46:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-10-14 21:46:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:46:13,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:13,149 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:13,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,353 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:13,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1465812461, now seen corresponding path program 1 times [2019-10-14 21:46:13,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:13,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758900506] [2019-10-14 21:46:13,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:13,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758900506] [2019-10-14 21:46:13,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472422284] [2019-10-14 21:46:13,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:13,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:13,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:13,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:13,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146262859] [2019-10-14 21:46:13,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:13,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:13,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:13,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:13,544 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 12 states. [2019-10-14 21:46:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:13,655 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2019-10-14 21:46:13,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:13,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-10-14 21:46:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:13,659 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:46:13,659 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:46:13,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:46:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 21:46:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:46:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2019-10-14 21:46:13,669 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 54 [2019-10-14 21:46:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:13,669 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2019-10-14 21:46:13,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2019-10-14 21:46:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:46:13,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:13,671 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:13,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,884 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash 812163087, now seen corresponding path program 2 times [2019-10-14 21:46:13,884 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:13,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298473299] [2019-10-14 21:46:13,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:13,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298473299] [2019-10-14 21:46:13,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355091828] [2019-10-14 21:46:13,993 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:14,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:14,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:14,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:14,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:14,077 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:14,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:14,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291375203] [2019-10-14 21:46:14,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:14,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:14,083 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2019-10-14 21:46:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:14,162 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-10-14 21:46:14,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:14,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-10-14 21:46:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:14,164 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:46:14,164 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:46:14,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:46:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 21:46:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:46:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2019-10-14 21:46:14,175 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 56 [2019-10-14 21:46:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:14,175 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2019-10-14 21:46:14,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2019-10-14 21:46:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:46:14,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:14,177 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:14,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:14,390 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:14,391 INFO L82 PathProgramCache]: Analyzing trace with hash -279660111, now seen corresponding path program 3 times [2019-10-14 21:46:14,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:14,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884363932] [2019-10-14 21:46:14,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:14,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:14,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:14,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884363932] [2019-10-14 21:46:14,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643401317] [2019-10-14 21:46:14,581 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:14,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:46:14,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:14,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:46:14,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:14,709 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:14,710 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:14,714 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:14,715 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:14,715 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-14 21:46:14,786 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-10-14 21:46:14,787 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:14,800 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:14,801 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:46:14,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-10-14 21:46:14,975 INFO L341 Elim1Store]: treesize reduction 17, result has 73.8 percent of original size [2019-10-14 21:46:14,976 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 88 [2019-10-14 21:46:14,978 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:15,015 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2019-10-14 21:46:15,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:15,018 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-14 21:46:15,020 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:71 [2019-10-14 21:46:15,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:15,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:17,333 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-10-14 21:46:17,333 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2019-10-14 21:46:17,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:17,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:17,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:17,337 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-10-14 21:46:17,363 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-10-14 21:46:17,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:17,366 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-10-14 21:46:17,366 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2019-10-14 21:46:17,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:46:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 21:46:17,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:17,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-10-14 21:46:17,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041592176] [2019-10-14 21:46:17,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:46:17,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:17,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:46:17,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=545, Unknown=1, NotChecked=0, Total=650 [2019-10-14 21:46:17,536 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 26 states. [2019-10-14 21:46:19,616 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2019-10-14 21:46:22,622 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 45 [2019-10-14 21:46:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:22,793 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2019-10-14 21:46:22,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-14 21:46:22,794 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2019-10-14 21:46:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:22,795 INFO L225 Difference]: With dead ends: 189 [2019-10-14 21:46:22,795 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 21:46:22,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=626, Invalid=3533, Unknown=1, NotChecked=0, Total=4160 [2019-10-14 21:46:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 21:46:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2019-10-14 21:46:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:46:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2019-10-14 21:46:22,808 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 58 [2019-10-14 21:46:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:22,809 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2019-10-14 21:46:22,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:46:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2019-10-14 21:46:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:46:22,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:22,810 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:23,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:23,017 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1291567727, now seen corresponding path program 4 times [2019-10-14 21:46:23,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:23,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335632190] [2019-10-14 21:46:23,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:23,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:23,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:23,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335632190] [2019-10-14 21:46:23,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375933196] [2019-10-14 21:46:23,176 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:23,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:23,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:23,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:23,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:23,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:23,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:46:23,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533675447] [2019-10-14 21:46:23,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:23,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:23,278 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 15 states. [2019-10-14 21:46:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:23,392 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2019-10-14 21:46:23,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:23,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2019-10-14 21:46:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:23,394 INFO L225 Difference]: With dead ends: 176 [2019-10-14 21:46:23,395 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:46:23,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:46:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-10-14 21:46:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 21:46:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2019-10-14 21:46:23,405 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 60 [2019-10-14 21:46:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:23,405 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2019-10-14 21:46:23,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2019-10-14 21:46:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:46:23,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:23,407 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:23,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:23,611 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2061060557, now seen corresponding path program 5 times [2019-10-14 21:46:23,612 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:23,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004811272] [2019-10-14 21:46:23,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:23,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:23,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:46:23,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004811272] [2019-10-14 21:46:23,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501677474] [2019-10-14 21:46:23,769 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:24,218 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:46:24,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:24,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:24,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-10-14 21:46:24,300 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:24,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-10-14 21:46:24,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837124092] [2019-10-14 21:46:24,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:46:24,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:46:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:24,304 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 20 states. [2019-10-14 21:46:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:24,694 INFO L93 Difference]: Finished difference Result 226 states and 293 transitions. [2019-10-14 21:46:24,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:46:24,694 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-10-14 21:46:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:24,696 INFO L225 Difference]: With dead ends: 226 [2019-10-14 21:46:24,696 INFO L226 Difference]: Without dead ends: 153 [2019-10-14 21:46:24,698 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:46:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-14 21:46:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-10-14 21:46:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 21:46:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2019-10-14 21:46:24,709 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 62 [2019-10-14 21:46:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:24,709 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2019-10-14 21:46:24,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:46:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2019-10-14 21:46:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:46:24,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:24,711 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:24,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:24,916 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash 304329915, now seen corresponding path program 6 times [2019-10-14 21:46:24,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:24,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320556447] [2019-10-14 21:46:24,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:24,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:24,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:25,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320556447] [2019-10-14 21:46:25,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057069933] [2019-10-14 21:46:25,081 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:25,276 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 21:46:25,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:25,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:25,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-10-14 21:46:25,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:25,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-10-14 21:46:25,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452696293] [2019-10-14 21:46:25,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:46:25,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:46:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:25,365 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand 22 states. [2019-10-14 21:46:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:25,792 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2019-10-14 21:46:25,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:46:25,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2019-10-14 21:46:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:25,794 INFO L225 Difference]: With dead ends: 252 [2019-10-14 21:46:25,795 INFO L226 Difference]: Without dead ends: 167 [2019-10-14 21:46:25,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=783, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:46:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-14 21:46:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2019-10-14 21:46:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 21:46:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2019-10-14 21:46:25,805 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 70 [2019-10-14 21:46:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:25,806 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2019-10-14 21:46:25,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:46:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2019-10-14 21:46:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:46:25,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:25,807 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:26,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:26,011 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1426838071, now seen corresponding path program 7 times [2019-10-14 21:46:26,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:26,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853689526] [2019-10-14 21:46:26,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:26,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853689526] [2019-10-14 21:46:26,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871231805] [2019-10-14 21:46:26,199 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:46:26,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:26,311 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:26,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:46:26,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244700544] [2019-10-14 21:46:26,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:46:26,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:46:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:26,313 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 18 states. [2019-10-14 21:46:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:26,461 INFO L93 Difference]: Finished difference Result 230 states and 294 transitions. [2019-10-14 21:46:26,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:26,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-10-14 21:46:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:26,463 INFO L225 Difference]: With dead ends: 230 [2019-10-14 21:46:26,463 INFO L226 Difference]: Without dead ends: 133 [2019-10-14 21:46:26,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-14 21:46:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-10-14 21:46:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-14 21:46:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2019-10-14 21:46:26,473 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 78 [2019-10-14 21:46:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:26,473 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2019-10-14 21:46:26,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:46:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2019-10-14 21:46:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 21:46:26,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:26,474 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:26,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:26,678 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1504565671, now seen corresponding path program 8 times [2019-10-14 21:46:26,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:26,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099445645] [2019-10-14 21:46:26,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:26,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099445645] [2019-10-14 21:46:26,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588079523] [2019-10-14 21:46:26,872 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:26,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:26,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:26,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:46:26,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:26,966 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:26,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:46:26,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431650427] [2019-10-14 21:46:26,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:26,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:26,967 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand 19 states. [2019-10-14 21:46:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:27,086 INFO L93 Difference]: Finished difference Result 232 states and 296 transitions. [2019-10-14 21:46:27,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:46:27,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2019-10-14 21:46:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:27,088 INFO L225 Difference]: With dead ends: 232 [2019-10-14 21:46:27,088 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 21:46:27,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 21:46:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-10-14 21:46:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 21:46:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2019-10-14 21:46:27,097 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 80 [2019-10-14 21:46:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:27,098 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2019-10-14 21:46:27,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2019-10-14 21:46:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:46:27,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:27,099 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:27,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:27,303 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1085015557, now seen corresponding path program 9 times [2019-10-14 21:46:27,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:27,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954216205] [2019-10-14 21:46:27,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:27,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:27,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:27,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954216205] [2019-10-14 21:46:27,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965875168] [2019-10-14 21:46:27,500 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:27,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:46:27,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:27,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:46:27,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:27,707 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:27,708 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:27,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:27,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:27,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-14 21:46:27,759 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-10-14 21:46:27,759 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:27,766 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:27,767 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:46:27,767 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-10-14 21:46:27,853 INFO L341 Elim1Store]: treesize reduction 17, result has 73.8 percent of original size [2019-10-14 21:46:27,854 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 88 [2019-10-14 21:46:27,855 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:27,882 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.0 percent of original size [2019-10-14 21:46:27,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:27,884 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 21:46:27,884 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:68 [2019-10-14 21:46:27,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:27,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,125 INFO L341 Elim1Store]: treesize reduction 52, result has 48.0 percent of original size [2019-10-14 21:46:28,127 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 100 [2019-10-14 21:46:28,128 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:28,159 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2019-10-14 21:46:28,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-14 21:46:28,163 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:63, output treesize:71 [2019-10-14 21:46:28,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,420 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-10-14 21:46:28,420 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2019-10-14 21:46:28,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,424 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-10-14 21:46:28,443 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-10-14 21:46:28,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:28,445 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-10-14 21:46:28,446 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2019-10-14 21:46:28,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:46:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-10-14 21:46:28,622 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:28,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-10-14 21:46:28,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157911494] [2019-10-14 21:46:28,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:46:28,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:46:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:46:28,624 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 35 states. [2019-10-14 21:46:33,227 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2019-10-14 21:46:35,885 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-10-14 21:46:38,140 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2019-10-14 21:46:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:45,703 INFO L93 Difference]: Finished difference Result 344 states and 437 transitions. [2019-10-14 21:46:45,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-10-14 21:46:45,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 82 [2019-10-14 21:46:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:45,705 INFO L225 Difference]: With dead ends: 344 [2019-10-14 21:46:45,705 INFO L226 Difference]: Without dead ends: 247 [2019-10-14 21:46:45,709 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1335, Invalid=9168, Unknown=3, NotChecked=0, Total=10506 [2019-10-14 21:46:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-10-14 21:46:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 164. [2019-10-14 21:46:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-14 21:46:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2019-10-14 21:46:45,722 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 82 [2019-10-14 21:46:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:45,722 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2019-10-14 21:46:45,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:46:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2019-10-14 21:46:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-14 21:46:45,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:45,724 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:45,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:45,928 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1390821791, now seen corresponding path program 10 times [2019-10-14 21:46:45,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:45,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463690523] [2019-10-14 21:46:45,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:46,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463690523] [2019-10-14 21:46:46,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228604856] [2019-10-14 21:46:46,166 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:46,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:46,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:46,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:46:46,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:46,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:46,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:46:46,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753464461] [2019-10-14 21:46:46,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:46:46,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:46:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:46,293 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand 21 states. [2019-10-14 21:46:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:46,440 INFO L93 Difference]: Finished difference Result 292 states and 376 transitions. [2019-10-14 21:46:46,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:46:46,440 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2019-10-14 21:46:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:46,441 INFO L225 Difference]: With dead ends: 292 [2019-10-14 21:46:46,441 INFO L226 Difference]: Without dead ends: 167 [2019-10-14 21:46:46,442 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-14 21:46:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-10-14 21:46:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-14 21:46:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2019-10-14 21:46:46,454 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 84 [2019-10-14 21:46:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:46,454 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2019-10-14 21:46:46,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:46:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2019-10-14 21:46:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:46:46,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:46,456 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:46,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:46,660 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:46,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1447988159, now seen corresponding path program 11 times [2019-10-14 21:46:46,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:46,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533675023] [2019-10-14 21:46:46,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:46,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:46,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:46,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533675023] [2019-10-14 21:46:46,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257108035] [2019-10-14 21:46:46,879 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:49,811 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:46:49,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:49,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:46:49,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:46:49,833 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:49,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:46:49,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301894671] [2019-10-14 21:46:49,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:46:49,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:46:49,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:49,834 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand 22 states.