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-industry-pattern/array_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:48:48,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:48:48,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:48:48,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:48:48,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:48:48,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:48:48,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:48:48,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:48:48,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:48:48,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:48:48,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:48:48,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:48:48,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:48:48,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:48:48,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:48:48,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:48:48,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:48:48,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:48:48,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:48:48,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:48:48,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:48:48,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:48:48,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:48:48,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:48:48,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:48:48,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:48:48,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:48:48,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:48:48,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:48:48,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:48:48,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:48:48,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:48:48,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:48:48,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:48:48,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:48:48,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:48:48,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:48:48,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:48:48,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:48:48,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:48:48,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:48:48,087 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 [2019-10-13 17:48:48,118 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:48:48,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:48:48,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:48:48,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:48:48,120 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:48:48,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:48:48,121 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:48:48,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:48:48,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:48:48,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:48:48,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:48:48,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:48:48,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:48:48,122 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:48:48,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:48:48,123 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:48:48,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:48:48,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:48:48,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:48:48,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:48:48,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:48:48,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:48:48,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:48:48,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:48:48,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:48:48,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:48:48,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:48:48,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:48:48,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:48:48,441 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:48:48,466 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:48:48,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:48:48,471 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:48:48,471 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:48:48,472 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-10-13 17:48:48,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f43906bf/c347759fb4814305bbaa86907d43ba52/FLAG8a29b6c46 [2019-10-13 17:48:49,025 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:48:49,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-10-13 17:48:49,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f43906bf/c347759fb4814305bbaa86907d43ba52/FLAG8a29b6c46 [2019-10-13 17:48:49,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f43906bf/c347759fb4814305bbaa86907d43ba52 [2019-10-13 17:48:49,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:48:49,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:48:49,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:49,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:48:49,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:48:49,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474e4df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49, skipping insertion in model container [2019-10-13 17:48:49,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,410 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:48:49,432 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:48:49,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:49,668 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:48:49,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:49,715 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:48:49,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49 WrapperNode [2019-10-13 17:48:49,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:49,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:48:49,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:48:49,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:48:49,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (1/1) ... [2019-10-13 17:48:49,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:48:49,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:48:49,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:48:49,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:48:49,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (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 [2019-10-13 17:48:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:48:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:48:49,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:48:49,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:48:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:48:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:48:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:48:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:48:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:48:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:48:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:48:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:48:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:48:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:48:50,120 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:48:50,120 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 17:48:50,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:50 BoogieIcfgContainer [2019-10-13 17:48:50,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:48:50,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:48:50,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:48:50,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:48:50,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:48:49" (1/3) ... [2019-10-13 17:48:50,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff9c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:50, skipping insertion in model container [2019-10-13 17:48:50,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:49" (2/3) ... [2019-10-13 17:48:50,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff9c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:50, skipping insertion in model container [2019-10-13 17:48:50,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:50" (3/3) ... [2019-10-13 17:48:50,145 INFO L109 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2019-10-13 17:48:50,165 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:48:50,181 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:48:50,204 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:48:50,232 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:48:50,232 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:48:50,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:48:50,233 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:48:50,233 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:48:50,233 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:48:50,233 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:48:50,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:48:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 17:48:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:48:50,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:50,253 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:50,255 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1065998934, now seen corresponding path program 1 times [2019-10-13 17:48:50,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:50,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678036347] [2019-10-13 17:48:50,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:50,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678036347] [2019-10-13 17:48:50,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:50,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:48:50,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950125932] [2019-10-13 17:48:50,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:48:50,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:48:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:48:50,460 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-13 17:48:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:50,535 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-10-13 17:48:50,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:48:50,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:48:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:50,544 INFO L225 Difference]: With dead ends: 40 [2019-10-13 17:48:50,545 INFO L226 Difference]: Without dead ends: 18 [2019-10-13 17:48:50,548 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 [2019-10-13 17:48:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-13 17:48:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-13 17:48:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-13 17:48:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-13 17:48:50,586 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-10-13 17:48:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:50,586 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-13 17:48:50,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:48:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-13 17:48:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:48:50,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:50,588 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:50,588 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1810951506, now seen corresponding path program 1 times [2019-10-13 17:48:50,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:50,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132889306] [2019-10-13 17:48:50,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:50,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132889306] [2019-10-13 17:48:50,710 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:50,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:48:50,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995201900] [2019-10-13 17:48:50,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:48:50,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:50,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:48:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:50,714 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-10-13 17:48:50,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:50,790 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-13 17:48:50,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:48:50,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:48:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:50,792 INFO L225 Difference]: With dead ends: 29 [2019-10-13 17:48:50,792 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 17:48:50,794 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 [2019-10-13 17:48:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 17:48:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 17:48:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 17:48:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-13 17:48:50,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2019-10-13 17:48:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:50,801 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-13 17:48:50,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:48:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-13 17:48:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:48:50,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:50,802 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:50,802 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1816633037, now seen corresponding path program 1 times [2019-10-13 17:48:50,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:50,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945166848] [2019-10-13 17:48:50,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:51,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945166848] [2019-10-13 17:48:51,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166120790] [2019-10-13 17:48:51,077 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 [2019-10-13 17:48:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:48:51,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:51,253 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 17:48:51,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,261 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:51,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,262 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-13 17:48:51,289 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2019-10-13 17:48:51,290 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,295 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:51,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,296 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2019-10-13 17:48:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:51,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:51,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2019-10-13 17:48:51,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916999960] [2019-10-13 17:48:51,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:48:51,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:48:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:51,369 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2019-10-13 17:48:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:51,594 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-10-13 17:48:51,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:48:51,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-10-13 17:48:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:51,596 INFO L225 Difference]: With dead ends: 28 [2019-10-13 17:48:51,596 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:48:51,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:48:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:48:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-10-13 17:48:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 17:48:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-13 17:48:51,605 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-13 17:48:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:51,606 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-13 17:48:51,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:48:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-13 17:48:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:48:51,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:51,607 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:51,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:51,811 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1919305976, now seen corresponding path program 1 times [2019-10-13 17:48:51,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:51,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401182228] [2019-10-13 17:48:51,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:51,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:51,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:51,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401182228] [2019-10-13 17:48:51,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686445200] [2019-10-13 17:48:51,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:48:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:52,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:48:52,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:52,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:52,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2019-10-13 17:48:52,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486796316] [2019-10-13 17:48:52,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:48:52,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:48:52,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:52,106 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2019-10-13 17:48:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:52,271 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-10-13 17:48:52,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:48:52,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-10-13 17:48:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:52,275 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:48:52,275 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:48:52,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:48:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:48:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-10-13 17:48:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:48:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-13 17:48:52,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2019-10-13 17:48:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:52,288 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-13 17:48:52,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:48:52,288 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-13 17:48:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:48:52,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:52,289 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:52,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:52,501 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:52,502 INFO L82 PathProgramCache]: Analyzing trace with hash -248493095, now seen corresponding path program 2 times [2019-10-13 17:48:52,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:52,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108704540] [2019-10-13 17:48:52,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:52,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:52,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:52,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108704540] [2019-10-13 17:48:52,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927839893] [2019-10-13 17:48:52,738 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 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 [2019-10-13 17:48:52,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:52,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:52,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:48:52,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:52,851 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 17:48:52,851 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:52,857 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:52,857 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:52,857 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:48:53,093 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:48:53,102 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:53,102 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:48:53,103 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:53,110 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:53,111 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:53,111 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:48:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:53,175 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:53,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2019-10-13 17:48:53,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016300607] [2019-10-13 17:48:53,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:48:53,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:48:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:48:53,177 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 21 states. [2019-10-13 17:48:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:53,598 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-13 17:48:53,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:48:53,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2019-10-13 17:48:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:53,600 INFO L225 Difference]: With dead ends: 36 [2019-10-13 17:48:53,600 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:48:53,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:48:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:48:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-13 17:48:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:48:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-10-13 17:48:53,608 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2019-10-13 17:48:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:53,608 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-10-13 17:48:53,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:48:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-10-13 17:48:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:48:53,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:53,610 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:53,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:53,814 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:53,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2146027630, now seen corresponding path program 3 times [2019-10-13 17:48:53,816 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:53,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834831169] [2019-10-13 17:48:53,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:53,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:53,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:48:53,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834831169] [2019-10-13 17:48:53,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766400605] [2019-10-13 17:48:53,968 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 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 [2019-10-13 17:48:54,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:48:54,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:54,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:48:54,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:48:54,074 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:54,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:48:54,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054156910] [2019-10-13 17:48:54,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:48:54,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:48:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:48:54,076 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2019-10-13 17:48:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:54,303 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-10-13 17:48:54,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:48:54,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-10-13 17:48:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:54,304 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:48:54,305 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 17:48:54,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:48:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 17:48:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-13 17:48:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:48:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-10-13 17:48:54,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2019-10-13 17:48:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:54,314 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-10-13 17:48:54,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:48:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-10-13 17:48:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:48:54,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:54,315 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:54,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:54,522 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1843644787, now seen corresponding path program 4 times [2019-10-13 17:48:54,523 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:54,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233615758] [2019-10-13 17:48:54,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:54,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:54,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:48:54,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233615758] [2019-10-13 17:48:54,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046418762] [2019-10-13 17:48:54,759 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 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 [2019-10-13 17:48:54,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:54,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:54,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:48:54,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:54,864 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 17:48:54,864 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:54,869 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:54,870 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:54,870 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:48:55,092 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:48:55,094 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:55,095 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:48:55,095 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:55,098 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:55,099 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:55,099 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:48:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:48:55,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:55,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-10-13 17:48:55,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862830233] [2019-10-13 17:48:55,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:48:55,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:55,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:48:55,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:48:55,164 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 24 states. [2019-10-13 17:48:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:55,604 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-10-13 17:48:55,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:48:55,608 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-13 17:48:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:55,609 INFO L225 Difference]: With dead ends: 44 [2019-10-13 17:48:55,609 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:48:55,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:48:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:48:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:48:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:48:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-13 17:48:55,619 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 31 [2019-10-13 17:48:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:55,619 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-13 17:48:55,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:48:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-13 17:48:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:48:55,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:55,621 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:55,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:55,824 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1415649464, now seen corresponding path program 5 times [2019-10-13 17:48:55,825 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:55,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385793058] [2019-10-13 17:48:55,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:48:55,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385793058] [2019-10-13 17:48:55,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710287932] [2019-10-13 17:48:55,938 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 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 [2019-10-13 17:48:55,991 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:48:55,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:55,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:48:55,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:48:56,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:56,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-13 17:48:56,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642496393] [2019-10-13 17:48:56,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:48:56,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:48:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:48:56,098 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-10-13 17:48:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:56,372 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2019-10-13 17:48:56,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:48:56,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2019-10-13 17:48:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:56,375 INFO L225 Difference]: With dead ends: 78 [2019-10-13 17:48:56,375 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:48:56,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:48:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:48:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-10-13 17:48:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:48:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-10-13 17:48:56,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2019-10-13 17:48:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:56,385 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-10-13 17:48:56,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:48:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-10-13 17:48:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:48:56,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:56,387 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:56,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:56,590 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash 942881177, now seen corresponding path program 6 times [2019-10-13 17:48:56,591 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:56,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769031567] [2019-10-13 17:48:56,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:56,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:56,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:48:56,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769031567] [2019-10-13 17:48:56,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128450292] [2019-10-13 17:48:56,836 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 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 [2019-10-13 17:48:56,890 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 17:48:56,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:56,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:48:56,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:56,914 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-13 17:48:56,915 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:56,921 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:56,922 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. [2019-10-13 17:48:56,922 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-13 17:48:57,204 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:57,205 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-10-13 17:48:57,205 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-13 17:48:57,214 INFO L567 ElimStorePlain]: treesize reduction 11, result has 38.9 percent of original size [2019-10-13 17:48:57,214 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:57,214 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:7 [2019-10-13 17:48:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:48:57,274 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:57,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 24 [2019-10-13 17:48:57,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522068883] [2019-10-13 17:48:57,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:48:57,275 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:48:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:48:57,276 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2019-10-13 17:48:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:57,964 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-10-13 17:48:57,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:48:57,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2019-10-13 17:48:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:57,967 INFO L225 Difference]: With dead ends: 52 [2019-10-13 17:48:57,967 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:48:57,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:48:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:48:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-13 17:48:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:48:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-10-13 17:48:57,983 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2019-10-13 17:48:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:57,985 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-10-13 17:48:57,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:48:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-10-13 17:48:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:48:57,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:57,988 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:58,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:58,192 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash 306205138, now seen corresponding path program 7 times [2019-10-13 17:48:58,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:58,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910471879] [2019-10-13 17:48:58,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:58,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:58,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:48:58,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910471879] [2019-10-13 17:48:58,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103622993] [2019-10-13 17:48:58,379 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 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 [2019-10-13 17:48:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:48:58,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:48:58,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:58,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-10-13 17:48:58,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099120200] [2019-10-13 17:48:58,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:48:58,537 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:58,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:48:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:48:58,539 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2019-10-13 17:48:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:58,833 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2019-10-13 17:48:58,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:48:58,834 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2019-10-13 17:48:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:58,835 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:48:58,835 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:48:58,836 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:48:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:48:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-13 17:48:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 17:48:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-13 17:48:58,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2019-10-13 17:48:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:58,845 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-13 17:48:58,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:48:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-13 17:48:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:48:58,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:58,846 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:59,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:59,053 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash -501743181, now seen corresponding path program 8 times [2019-10-13 17:48:59,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:59,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242542989] [2019-10-13 17:48:59,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:48:59,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242542989] [2019-10-13 17:48:59,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013817071] [2019-10-13 17:48:59,313 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 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 [2019-10-13 17:48:59,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:59,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:59,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-13 17:48:59,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:59,568 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 17:48:59,569 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:59,576 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:59,576 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:59,577 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:49:00,268 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:49:00,269 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:00,269 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:49:00,270 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:00,275 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:00,276 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:00,276 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:49:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:49:00,354 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:00,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2019-10-13 17:49:00,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880147820] [2019-10-13 17:49:00,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 17:49:00,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 17:49:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:49:00,356 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 34 states. [2019-10-13 17:49:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:01,240 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-13 17:49:01,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:49:01,240 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 47 [2019-10-13 17:49:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:01,241 INFO L225 Difference]: With dead ends: 60 [2019-10-13 17:49:01,241 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:49:01,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2019-10-13 17:49:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:49:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 17:49:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:49:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-10-13 17:49:01,251 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2019-10-13 17:49:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:01,252 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-10-13 17:49:01,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 17:49:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-10-13 17:49:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:49:01,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:01,253 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:01,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:01,457 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1211557768, now seen corresponding path program 9 times [2019-10-13 17:49:01,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:01,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076239993] [2019-10-13 17:49:01,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:01,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:01,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:49:01,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076239993] [2019-10-13 17:49:01,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813353918] [2019-10-13 17:49:01,611 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 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 [2019-10-13 17:49:01,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:49:01,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:01,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:49:01,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:49:01,795 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:01,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2019-10-13 17:49:01,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339628208] [2019-10-13 17:49:01,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:49:01,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:49:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:49:01,797 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2019-10-13 17:49:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:02,139 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2019-10-13 17:49:02,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:49:02,140 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2019-10-13 17:49:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:02,142 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:49:02,142 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:49:02,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:49:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:49:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-10-13 17:49:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-13 17:49:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-10-13 17:49:02,156 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2019-10-13 17:49:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:02,157 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-10-13 17:49:02,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:49:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-10-13 17:49:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 17:49:02,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:02,158 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:02,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:02,363 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:02,363 INFO L82 PathProgramCache]: Analyzing trace with hash -660121767, now seen corresponding path program 10 times [2019-10-13 17:49:02,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:02,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110821019] [2019-10-13 17:49:02,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:02,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:02,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:49:02,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110821019] [2019-10-13 17:49:02,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154457093] [2019-10-13 17:49:02,761 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 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 [2019-10-13 17:49:02,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:02,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:02,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 17:49:02,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:02,996 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 17:49:02,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:03,000 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:03,000 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:03,000 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:49:03,527 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:49:03,529 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:03,529 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:49:03,530 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:03,533 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:03,534 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:03,534 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:49:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:49:03,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:03,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2019-10-13 17:49:03,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130837135] [2019-10-13 17:49:03,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:49:03,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:49:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:49:03,625 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 36 states. [2019-10-13 17:49:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:04,537 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2019-10-13 17:49:04,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:49:04,538 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2019-10-13 17:49:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:04,539 INFO L225 Difference]: With dead ends: 68 [2019-10-13 17:49:04,539 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:49:04,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:49:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:49:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-13 17:49:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:49:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-13 17:49:04,550 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 55 [2019-10-13 17:49:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:04,551 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-13 17:49:04,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:49:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-13 17:49:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:49:04,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:04,552 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:04,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:04,756 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash 843267090, now seen corresponding path program 11 times [2019-10-13 17:49:04,757 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:04,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860563863] [2019-10-13 17:49:04,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:04,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:04,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:49:04,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860563863] [2019-10-13 17:49:04,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170376072] [2019-10-13 17:49:04,936 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 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 [2019-10-13 17:49:05,011 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 17:49:05,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:05,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:49:05,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:49:05,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:05,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 26 [2019-10-13 17:49:05,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792617416] [2019-10-13 17:49:05,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:49:05,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:05,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:49:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:49:05,185 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-10-13 17:49:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:05,643 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2019-10-13 17:49:05,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:49:05,644 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2019-10-13 17:49:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:05,645 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:49:05,645 INFO L226 Difference]: Without dead ends: 70 [2019-10-13 17:49:05,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:49:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-13 17:49:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-10-13 17:49:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:49:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-10-13 17:49:05,654 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2019-10-13 17:49:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:05,655 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-10-13 17:49:05,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:49:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-10-13 17:49:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:49:05,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:05,658 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:05,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:05,858 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955443, now seen corresponding path program 12 times [2019-10-13 17:49:05,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:05,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134110257] [2019-10-13 17:49:05,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:05,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:05,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:49:06,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134110257] [2019-10-13 17:49:06,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629294659] [2019-10-13 17:49:06,192 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 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 [2019-10-13 17:49:06,270 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:49:06,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:06,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-13 17:49:06,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:06,302 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-10-13 17:49:06,302 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:06,309 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:06,310 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:06,310 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-13 17:49:06,387 INFO L341 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-10-13 17:49:06,388 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-10-13 17:49:06,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:06,397 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:06,398 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. [2019-10-13 17:49:06,398 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-10-13 17:49:07,916 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-10-13 17:49:07,917 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2019-10-13 17:49:07,918 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:07,932 INFO L567 ElimStorePlain]: treesize reduction 32, result has 28.9 percent of original size [2019-10-13 17:49:07,933 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:07,933 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:10 [2019-10-13 17:49:07,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:49:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 15 proven. 97 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 17:49:08,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:08,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 37 [2019-10-13 17:49:08,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355688010] [2019-10-13 17:49:08,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:49:08,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:49:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:49:08,061 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 37 states. [2019-10-13 17:49:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:09,450 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-10-13 17:49:09,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:49:09,451 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-10-13 17:49:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:09,452 INFO L225 Difference]: With dead ends: 76 [2019-10-13 17:49:09,453 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:49:09,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2019-10-13 17:49:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:49:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 17:49:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:49:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-10-13 17:49:09,465 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 63 [2019-10-13 17:49:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:09,466 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-10-13 17:49:09,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:49:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-10-13 17:49:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:49:09,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:09,467 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:09,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:09,672 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1581926456, now seen corresponding path program 13 times [2019-10-13 17:49:09,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:09,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396534224] [2019-10-13 17:49:09,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-13 17:49:09,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396534224] [2019-10-13 17:49:09,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057398944] [2019-10-13 17:49:09,854 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 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 [2019-10-13 17:49:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:49:09,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-13 17:49:10,108 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:10,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 29 [2019-10-13 17:49:10,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228760044] [2019-10-13 17:49:10,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:49:10,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:49:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:49:10,110 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 29 states. [2019-10-13 17:49:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:10,513 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2019-10-13 17:49:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:49:10,514 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2019-10-13 17:49:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:10,515 INFO L225 Difference]: With dead ends: 138 [2019-10-13 17:49:10,515 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 17:49:10,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:49:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 17:49:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2019-10-13 17:49:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-13 17:49:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-10-13 17:49:10,525 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2019-10-13 17:49:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:10,526 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-10-13 17:49:10,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:49:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-10-13 17:49:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 17:49:10,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:10,527 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:10,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:10,730 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 205038873, now seen corresponding path program 14 times [2019-10-13 17:49:10,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:10,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776650320] [2019-10-13 17:49:10,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:10,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:10,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-13 17:49:11,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776650320] [2019-10-13 17:49:11,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025524886] [2019-10-13 17:49:11,128 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 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 [2019-10-13 17:49:11,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:11,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:11,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-13 17:49:11,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:11,424 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 17:49:11,425 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:11,430 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:11,430 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:11,431 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:49:12,416 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:49:12,418 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:12,418 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:49:12,419 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:12,422 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:12,422 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:12,423 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:49:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 17:49:12,536 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:12,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-10-13 17:49:12,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421474566] [2019-10-13 17:49:12,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-13 17:49:12,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-13 17:49:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:49:12,538 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 46 states. [2019-10-13 17:49:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:14,022 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-10-13 17:49:14,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 17:49:14,023 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 71 [2019-10-13 17:49:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:14,024 INFO L225 Difference]: With dead ends: 84 [2019-10-13 17:49:14,024 INFO L226 Difference]: Without dead ends: 82 [2019-10-13 17:49:14,027 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=259, Invalid=3281, Unknown=0, NotChecked=0, Total=3540 [2019-10-13 17:49:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-13 17:49:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-10-13 17:49:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-13 17:49:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-10-13 17:49:14,037 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2019-10-13 17:49:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:14,037 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-10-13 17:49:14,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-13 17:49:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-10-13 17:49:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:49:14,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:14,038 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:14,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:14,242 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:14,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1393363374, now seen corresponding path program 15 times [2019-10-13 17:49:14,243 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:14,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121718414] [2019-10-13 17:49:14,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:14,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:14,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:49:14,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121718414] [2019-10-13 17:49:14,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864627457] [2019-10-13 17:49:14,473 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 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 [2019-10-13 17:49:14,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:49:14,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:14,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:49:14,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:49:14,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:14,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 32 [2019-10-13 17:49:14,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593716168] [2019-10-13 17:49:14,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:49:14,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:49:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:49:14,849 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 32 states. [2019-10-13 17:49:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:15,421 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2019-10-13 17:49:15,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:49:15,422 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2019-10-13 17:49:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:15,423 INFO L225 Difference]: With dead ends: 153 [2019-10-13 17:49:15,423 INFO L226 Difference]: Without dead ends: 86 [2019-10-13 17:49:15,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 17:49:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-13 17:49:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2019-10-13 17:49:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:49:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2019-10-13 17:49:15,431 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2019-10-13 17:49:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:15,431 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2019-10-13 17:49:15,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:49:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2019-10-13 17:49:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 17:49:15,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:15,433 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:15,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,634 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1961550387, now seen corresponding path program 16 times [2019-10-13 17:49:15,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:15,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130747567] [2019-10-13 17:49:15,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:15,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:15,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:49:16,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130747567] [2019-10-13 17:49:16,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526359078] [2019-10-13 17:49:16,212 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 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 [2019-10-13 17:49:16,301 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:16,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:16,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-13 17:49:16,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:16,343 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-10-13 17:49:16,343 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:16,346 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:16,346 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:16,347 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-13 17:49:17,278 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:49:17,280 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:17,280 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:49:17,281 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:17,284 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:17,284 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:17,284 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:49:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:49:17,382 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:17,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2019-10-13 17:49:17,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660795146] [2019-10-13 17:49:17,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:49:17,383 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:17,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:49:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:49:17,384 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 37 states. [2019-10-13 17:49:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:18,729 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-10-13 17:49:18,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:49:18,730 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2019-10-13 17:49:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:18,731 INFO L225 Difference]: With dead ends: 92 [2019-10-13 17:49:18,731 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:49:18,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 65 SyntacticMatches, 21 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 17:49:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:49:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 17:49:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:49:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2019-10-13 17:49:18,741 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 79 [2019-10-13 17:49:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:18,742 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2019-10-13 17:49:18,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:49:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2019-10-13 17:49:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:49:18,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:18,743 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:18,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:18,947 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:18,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1399805960, now seen corresponding path program 17 times [2019-10-13 17:49:18,948 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:18,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588924502] [2019-10-13 17:49:18,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:18,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:18,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:49:19,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588924502] [2019-10-13 17:49:19,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632939882] [2019-10-13 17:49:19,187 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:19,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-13 17:49:19,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:19,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:49:19,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:49:19,501 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:19,501 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 35 [2019-10-13 17:49:19,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908619412] [2019-10-13 17:49:19,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 17:49:19,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 17:49:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:49:19,503 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 35 states. [2019-10-13 17:49:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:20,052 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2019-10-13 17:49:20,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:49:20,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2019-10-13 17:49:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:20,055 INFO L225 Difference]: With dead ends: 168 [2019-10-13 17:49:20,055 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:49:20,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:49:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:49:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2019-10-13 17:49:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-13 17:49:20,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2019-10-13 17:49:20,066 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2019-10-13 17:49:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:20,066 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2019-10-13 17:49:20,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 17:49:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2019-10-13 17:49:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:49:20,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:20,068 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:20,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:20,274 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:20,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1349311783, now seen corresponding path program 18 times [2019-10-13 17:49:20,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:20,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756178120] [2019-10-13 17:49:20,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:20,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:20,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:49:20,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756178120] [2019-10-13 17:49:20,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988634224] [2019-10-13 17:49:20,711 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:20,823 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-13 17:49:20,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:20,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-13 17:49:20,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:21,127 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-10-13 17:49:21,127 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:21,139 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:21,139 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:21,139 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-13 17:49:21,184 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:21,185 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 23 treesize of output 22 [2019-10-13 17:49:21,185 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:21,192 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:21,193 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:21,193 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-13 17:49:23,061 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:49:23,062 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:23,063 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 3 case distinctions, treesize of input 24 treesize of output 13 [2019-10-13 17:49:23,063 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:23,066 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:23,067 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:23,067 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2019-10-13 17:49:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 24 proven. 199 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-13 17:49:23,200 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:23,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 55 [2019-10-13 17:49:23,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483417091] [2019-10-13 17:49:23,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-13 17:49:23,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-13 17:49:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2788, Unknown=0, NotChecked=0, Total=2970 [2019-10-13 17:49:23,202 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2019-10-13 17:49:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:25,492 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2019-10-13 17:49:25,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:49:25,493 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 87 [2019-10-13 17:49:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:25,494 INFO L225 Difference]: With dead ends: 100 [2019-10-13 17:49:25,495 INFO L226 Difference]: Without dead ends: 98 [2019-10-13 17:49:25,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 17 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=321, Invalid=4509, Unknown=0, NotChecked=0, Total=4830 [2019-10-13 17:49:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-13 17:49:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-13 17:49:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:49:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2019-10-13 17:49:25,509 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2019-10-13 17:49:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:25,510 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2019-10-13 17:49:25,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-13 17:49:25,510 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2019-10-13 17:49:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 17:49:25,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:25,511 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:25,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:25,722 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1277395090, now seen corresponding path program 19 times [2019-10-13 17:49:25,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:25,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993868262] [2019-10-13 17:49:25,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:25,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:25,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-13 17:49:26,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993868262] [2019-10-13 17:49:26,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580230318] [2019-10-13 17:49:26,023 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:49:26,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-13 17:49:26,398 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:26,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 38 [2019-10-13 17:49:26,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253245423] [2019-10-13 17:49:26,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:49:26,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:49:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:49:26,400 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 38 states. [2019-10-13 17:49:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:26,960 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2019-10-13 17:49:26,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:49:26,962 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 94 [2019-10-13 17:49:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:26,963 INFO L225 Difference]: With dead ends: 183 [2019-10-13 17:49:26,963 INFO L226 Difference]: Without dead ends: 102 [2019-10-13 17:49:26,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=543, Invalid=1907, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 17:49:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-13 17:49:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2019-10-13 17:49:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 17:49:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2019-10-13 17:49:26,980 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2019-10-13 17:49:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:26,980 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2019-10-13 17:49:26,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:49:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2019-10-13 17:49:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 17:49:26,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:26,982 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:27,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:27,187 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 439454323, now seen corresponding path program 20 times [2019-10-13 17:49:27,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:27,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709867934] [2019-10-13 17:49:27,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:27,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:27,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-13 17:49:27,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709867934] [2019-10-13 17:49:27,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192038420] [2019-10-13 17:49:27,774 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:27,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:27,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:27,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-13 17:49:27,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:28,233 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 17:49:28,233 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:28,236 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:28,237 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:28,237 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:49:29,723 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:49:29,725 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:29,725 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-13 17:49:29,726 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:29,728 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:29,729 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:29,729 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-13 17:49:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-13 17:49:29,867 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:29,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2019-10-13 17:49:29,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299402528] [2019-10-13 17:49:29,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-13 17:49:29,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:29,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-13 17:49:29,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2019-10-13 17:49:29,870 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 58 states.