java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:42,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:42,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:42,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:42,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:42,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:42,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:42,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:42,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:42,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:42,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:42,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:42,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:42,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:42,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:42,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:42,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:42,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:42,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:42,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:42,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:42,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:42,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:42,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:42,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:42:42,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:42:42,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:42:42,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:42:42,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:42:42,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:42:42,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:42,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:42,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:42,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:42,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:42,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:42,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:42,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:42,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:42,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:42,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:42,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:42:42,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:42,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:42,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:42,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:42,157 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:42,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:42,159 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:42,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:42,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:42,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:42,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:42,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:42,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:42,161 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:42,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:42,161 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:42,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:42,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:42,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:42,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:42,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:42,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:42,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:42,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:42,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:42,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:42,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:42,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:42,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:42,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:42,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:42,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:42,491 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:42,491 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:42,492 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-10-14 21:42:42,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dcb0e658/a9a36af9718f476fa263d21c5b390829/FLAG781553356 [2019-10-14 21:42:43,018 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:43,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-10-14 21:42:43,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dcb0e658/a9a36af9718f476fa263d21c5b390829/FLAG781553356 [2019-10-14 21:42:43,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dcb0e658/a9a36af9718f476fa263d21c5b390829 [2019-10-14 21:42:43,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:43,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:43,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:43,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:43,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:43,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9d9e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43, skipping insertion in model container [2019-10-14 21:42:43,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,435 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:43,453 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:43,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:43,637 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:43,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:43,677 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:43,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43 WrapperNode [2019-10-14 21:42:43,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:43,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:43,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:43,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:43,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... [2019-10-14 21:42:43,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:43,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:43,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:43,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:43,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:43,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:43,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:43,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:43,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:43,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:43,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:43,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:44,122 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:44,123 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:42:44,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:44 BoogieIcfgContainer [2019-10-14 21:42:44,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:44,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:44,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:44,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:44,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:43" (1/3) ... [2019-10-14 21:42:44,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398b9e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:44, skipping insertion in model container [2019-10-14 21:42:44,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:43" (2/3) ... [2019-10-14 21:42:44,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398b9e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:44, skipping insertion in model container [2019-10-14 21:42:44,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:44" (3/3) ... [2019-10-14 21:42:44,133 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2019-10-14 21:42:44,143 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:44,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:44,186 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:44,218 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:44,218 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:44,218 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:44,219 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:44,219 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:44,219 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:44,219 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:44,219 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 21:42:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:42:44,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,247 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,251 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1983579869, now seen corresponding path program 1 times [2019-10-14 21:42:44,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055910191] [2019-10-14 21:42:44,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:44,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055910191] [2019-10-14 21:42:44,433 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:44,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:44,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376830974] [2019-10-14 21:42:44,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:44,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:44,455 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 21:42:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,561 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-10-14 21:42:44,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:44,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:42:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,572 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:42:44,572 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:42:44,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:42:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:42:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:42:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-14 21:42:44,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-14 21:42:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,614 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-14 21:42:44,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-14 21:42:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:42:44,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,616 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,617 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash -901393582, now seen corresponding path program 1 times [2019-10-14 21:42:44,618 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207288335] [2019-10-14 21:42:44,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:44,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207288335] [2019-10-14 21:42:44,698 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:44,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:44,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896644022] [2019-10-14 21:42:44,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:44,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:44,702 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-14 21:42:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,807 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-10-14 21:42:44,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:44,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:42:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,809 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:42:44,809 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:42:44,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:42:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 21:42:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:42:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-14 21:42:44,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-14 21:42:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,819 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-14 21:42:44,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-14 21:42:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:42:44,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,820 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,821 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 211155632, now seen corresponding path program 1 times [2019-10-14 21:42:44,821 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971539686] [2019-10-14 21:42:44,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:44,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971539686] [2019-10-14 21:42:44,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:44,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:44,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097142709] [2019-10-14 21:42:44,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:44,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:44,923 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-14 21:42:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,992 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-14 21:42:44,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:44,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:42:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,994 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:42:44,994 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:42:44,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:42:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-14 21:42:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:42:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:42:45,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-14 21:42:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,001 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:42:45,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:42:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:45,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,002 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,003 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1966133540, now seen corresponding path program 1 times [2019-10-14 21:42:45,003 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898921192] [2019-10-14 21:42:45,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:45,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898921192] [2019-10-14 21:42:45,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794015944] [2019-10-14 21:42:45,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:45,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:42:45,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161961985] [2019-10-14 21:42:45,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:45,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:45,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:45,181 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 21:42:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,277 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-14 21:42:45,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:45,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:42:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,279 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:42:45,279 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:42:45,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:42:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:42:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:42:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 21:42:45,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-14 21:42:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,286 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 21:42:45,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 21:42:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:45,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,287 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,491 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1743188542, now seen corresponding path program 2 times [2019-10-14 21:42:45,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598106041] [2019-10-14 21:42:45,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:45,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598106041] [2019-10-14 21:42:45,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609595374] [2019-10-14 21:42:45,611 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:45,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:45,688 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:42:45,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224204048] [2019-10-14 21:42:45,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:45,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:45,691 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-10-14 21:42:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,764 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-10-14 21:42:45,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:45,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-14 21:42:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,766 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:42:45,766 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:42:45,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:42:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:42:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:42:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 21:42:45,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-10-14 21:42:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,778 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 21:42:45,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 21:42:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:42:45,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,780 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,990 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1578853664, now seen corresponding path program 3 times [2019-10-14 21:42:45,991 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052928495] [2019-10-14 21:42:45,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:46,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052928495] [2019-10-14 21:42:46,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362113847] [2019-10-14 21:42:46,086 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:42:46,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:46,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:42:46,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892430751] [2019-10-14 21:42:46,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:46,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:46,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:46,173 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-10-14 21:42:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,279 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-14 21:42:46,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:42:46,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 21:42:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,280 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:42:46,280 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:42:46,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:42:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-14 21:42:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:42:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-14 21:42:46,287 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2019-10-14 21:42:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,287 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-14 21:42:46,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-14 21:42:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:42:46,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,288 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,492 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,492 INFO L82 PathProgramCache]: Analyzing trace with hash 334919882, now seen corresponding path program 4 times [2019-10-14 21:42:46,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867359240] [2019-10-14 21:42:46,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:46,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867359240] [2019-10-14 21:42:46,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761962811] [2019-10-14 21:42:46,613 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,673 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:46,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:46,691 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:42:46,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879935236] [2019-10-14 21:42:46,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:46,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:46,693 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-10-14 21:42:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,807 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-10-14 21:42:46,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:46,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-10-14 21:42:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,809 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:42:46,809 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:42:46,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:42:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-14 21:42:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:42:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 21:42:46,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2019-10-14 21:42:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,819 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 21:42:46,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 21:42:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:42:46,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,820 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,026 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1980195752, now seen corresponding path program 5 times [2019-10-14 21:42:47,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071626718] [2019-10-14 21:42:47,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:47,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071626718] [2019-10-14 21:42:47,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538895906] [2019-10-14 21:42:47,151 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,266 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:42:47,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:47,327 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:47,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:42:47,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385186482] [2019-10-14 21:42:47,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:42:47,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:47,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:42:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:47,329 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-10-14 21:42:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:47,430 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2019-10-14 21:42:47,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:47,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-10-14 21:42:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:47,432 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:42:47,432 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:42:47,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:42:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-14 21:42:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:42:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 21:42:47,439 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-14 21:42:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:47,439 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 21:42:47,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:42:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 21:42:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:42:47,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:47,441 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,646 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1077588678, now seen corresponding path program 6 times [2019-10-14 21:42:47,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536858475] [2019-10-14 21:42:47,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:47,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536858475] [2019-10-14 21:42:47,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727662969] [2019-10-14 21:42:47,766 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,821 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:42:47,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,885 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:42:47,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:47,897 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:47,897 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:47,898 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:42:48,036 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-14 21:42:48,037 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:48,046 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:48,047 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:48,047 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:42:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 21:42:48,092 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-14 21:42:48,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696642455] [2019-10-14 21:42:48,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:48,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:48,094 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 18 states. [2019-10-14 21:42:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,635 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2019-10-14 21:42:48,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:48,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2019-10-14 21:42:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,638 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:42:48,638 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:42:48,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:42:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-10-14 21:42:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:42:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-10-14 21:42:48,653 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2019-10-14 21:42:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,653 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-10-14 21:42:48,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-10-14 21:42:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:42:48,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,655 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,859 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash 736793638, now seen corresponding path program 1 times [2019-10-14 21:42:48,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741299447] [2019-10-14 21:42:48,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-14 21:42:48,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741299447] [2019-10-14 21:42:48,924 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:48,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:48,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042439866] [2019-10-14 21:42:48,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:48,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:48,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:48,926 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 4 states. [2019-10-14 21:42:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,976 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-10-14 21:42:48,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:48,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-14 21:42:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,979 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:42:48,979 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:42:48,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:42:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 21:42:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:42:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-10-14 21:42:48,987 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2019-10-14 21:42:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,988 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-10-14 21:42:48,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-10-14 21:42:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:42:48,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,989 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,990 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash 236515004, now seen corresponding path program 1 times [2019-10-14 21:42:48,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718810859] [2019-10-14 21:42:48,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:42:49,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718810859] [2019-10-14 21:42:49,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443077416] [2019-10-14 21:42:49,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:49,169 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:42:49,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114666477] [2019-10-14 21:42:49,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:42:49,170 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:42:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:49,171 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2019-10-14 21:42:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,275 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2019-10-14 21:42:49,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:49,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-10-14 21:42:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,278 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:42:49,278 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:42:49,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:42:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:42:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:42:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-14 21:42:49,287 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2019-10-14 21:42:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,287 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-14 21:42:49,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:42:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-14 21:42:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:42:49,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,288 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,498 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash -583312482, now seen corresponding path program 2 times [2019-10-14 21:42:49,499 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618953465] [2019-10-14 21:42:49,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:42:49,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618953465] [2019-10-14 21:42:49,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896262789] [2019-10-14 21:42:49,632 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:49,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:49,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:49,716 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:42:49,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665431177] [2019-10-14 21:42:49,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:49,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:49,719 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 13 states. [2019-10-14 21:42:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,802 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2019-10-14 21:42:49,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:49,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2019-10-14 21:42:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,804 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:42:49,804 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:42:49,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:42:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:42:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:42:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-14 21:42:49,812 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2019-10-14 21:42:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,812 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-14 21:42:49,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-14 21:42:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:42:49,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,814 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:50,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,026 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1836455936, now seen corresponding path program 3 times [2019-10-14 21:42:50,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:50,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837178188] [2019-10-14 21:42:50,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:42:50,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837178188] [2019-10-14 21:42:50,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566750728] [2019-10-14 21:42:50,182 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:42:50,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-14 21:42:50,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:50,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 21:42:50,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068836623] [2019-10-14 21:42:50,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:50,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:50,344 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 17 states. [2019-10-14 21:42:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:50,539 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2019-10-14 21:42:50,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:50,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-10-14 21:42:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:50,541 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:42:50,541 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:42:50,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:42:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-10-14 21:42:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:42:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-10-14 21:42:50,550 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 50 [2019-10-14 21:42:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:50,551 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-10-14 21:42:50,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-10-14 21:42:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:42:50,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:50,552 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:50,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,762 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:50,763 INFO L82 PathProgramCache]: Analyzing trace with hash 450442770, now seen corresponding path program 4 times [2019-10-14 21:42:50,763 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:50,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421060139] [2019-10-14 21:42:50,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:50,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421060139] [2019-10-14 21:42:50,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630817225] [2019-10-14 21:42:50,914 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:50,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:42:51,014 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:51,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:42:51,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830527492] [2019-10-14 21:42:51,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:42:51,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:51,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:42:51,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:51,016 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2019-10-14 21:42:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:51,119 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2019-10-14 21:42:51,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:51,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2019-10-14 21:42:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:51,121 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:42:51,121 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:42:51,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:42:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-10-14 21:42:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:42:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-14 21:42:51,132 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2019-10-14 21:42:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:51,132 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-14 21:42:51,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:42:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-14 21:42:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:42:51,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:51,133 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:51,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,345 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash -695851152, now seen corresponding path program 5 times [2019-10-14 21:42:51,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:51,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555909457] [2019-10-14 21:42:51,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:51,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555909457] [2019-10-14 21:42:51,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979473751] [2019-10-14 21:42:51,508 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,375 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:42:52,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:52,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:52,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-14 21:42:52,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:52,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-10-14 21:42:52,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301702094] [2019-10-14 21:42:52,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:42:52,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:42:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:52,473 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2019-10-14 21:42:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:52,608 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2019-10-14 21:42:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:52,608 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2019-10-14 21:42:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:52,609 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:42:52,609 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 21:42:52,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 21:42:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2019-10-14 21:42:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:42:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-14 21:42:52,617 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 57 [2019-10-14 21:42:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:52,617 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-14 21:42:52,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:42:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-14 21:42:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:42:52,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:52,618 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:52,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,819 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash -190760666, now seen corresponding path program 6 times [2019-10-14 21:42:52,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:52,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052400292] [2019-10-14 21:42:52,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:52,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052400292] [2019-10-14 21:42:52,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311168918] [2019-10-14 21:42:52,990 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:53,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 21:42:53,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:53,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:53,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 21:42:53,423 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:53,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-10-14 21:42:53,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505970374] [2019-10-14 21:42:53,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:53,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:53,424 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 22 states. [2019-10-14 21:42:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:53,608 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-10-14 21:42:53,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:53,608 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2019-10-14 21:42:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:53,609 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:42:53,609 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:42:53,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:42:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2019-10-14 21:42:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:42:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-10-14 21:42:53,616 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 62 [2019-10-14 21:42:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:53,617 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-10-14 21:42:53,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-10-14 21:42:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:42:53,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:53,618 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:53,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:53,823 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:53,823 INFO L82 PathProgramCache]: Analyzing trace with hash -512270804, now seen corresponding path program 7 times [2019-10-14 21:42:53,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:53,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219224158] [2019-10-14 21:42:53,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:53,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:53,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:53,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219224158] [2019-10-14 21:42:53,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915940126] [2019-10-14 21:42:53,989 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:42:54,082 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:54,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:42:54,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150395507] [2019-10-14 21:42:54,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:54,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:54,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:54,084 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 18 states. [2019-10-14 21:42:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,184 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2019-10-14 21:42:54,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:54,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2019-10-14 21:42:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,186 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:42:54,186 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:42:54,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:42:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 21:42:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:42:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-10-14 21:42:54,194 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 67 [2019-10-14 21:42:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,194 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-10-14 21:42:54,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-10-14 21:42:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:42:54,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,195 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:54,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,407 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1751069322, now seen corresponding path program 8 times [2019-10-14 21:42:54,407 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:54,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977498229] [2019-10-14 21:42:54,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:54,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977498229] [2019-10-14 21:42:54,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247330399] [2019-10-14 21:42:54,618 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:54,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:54,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:42:54,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:54,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:42:54,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179085470] [2019-10-14 21:42:54,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:54,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:54,727 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2019-10-14 21:42:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,838 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2019-10-14 21:42:54,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:54,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-10-14 21:42:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,840 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:42:54,840 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:42:54,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:42:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 21:42:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:42:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-10-14 21:42:54,846 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2019-10-14 21:42:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,846 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-10-14 21:42:54,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-10-14 21:42:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:42:54,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,847 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:55,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,052 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash -727488664, now seen corresponding path program 9 times [2019-10-14 21:42:55,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:55,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503145848] [2019-10-14 21:42:55,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:55,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503145848] [2019-10-14 21:42:55,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149319325] [2019-10-14 21:42:55,257 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:42:55,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:55,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:42:55,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:55,340 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:42:55,340 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:55,345 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:55,345 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:55,346 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:42:57,550 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (= (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) 4) (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 4)) (not (= |v_main_~#b~0.base_BEFORE_CALL_1| |v_main_~#a~0.base_BEFORE_CALL_1|)))) is different from true [2019-10-14 21:42:57,644 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-14 21:42:57,644 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:57,647 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:57,648 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:57,648 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:42:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 251 trivial. 2 not checked. [2019-10-14 21:42:57,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:57,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2019-10-14 21:42:57,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849327877] [2019-10-14 21:42:57,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:42:57,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:42:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=632, Unknown=1, NotChecked=54, Total=870 [2019-10-14 21:42:57,722 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 30 states. [2019-10-14 21:43:02,491 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:43:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:06,893 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2019-10-14 21:43:06,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:43:06,894 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2019-10-14 21:43:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:06,895 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:43:06,895 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:43:06,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=527, Invalid=2229, Unknown=4, NotChecked=102, Total=2862 [2019-10-14 21:43:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:43:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-10-14 21:43:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:43:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2019-10-14 21:43:06,916 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 71 [2019-10-14 21:43:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:06,916 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2019-10-14 21:43:06,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:43:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2019-10-14 21:43:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:43:06,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:06,920 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:07,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:07,133 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -125445286, now seen corresponding path program 10 times [2019-10-14 21:43:07,133 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:07,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757595579] [2019-10-14 21:43:07,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:43:07,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757595579] [2019-10-14 21:43:07,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012050050] [2019-10-14 21:43:07,344 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:07,432 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:07,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:07,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:43:07,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:43:07,459 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:07,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:43:07,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619199897] [2019-10-14 21:43:07,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:43:07,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:43:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:07,463 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 21 states. [2019-10-14 21:43:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:07,569 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2019-10-14 21:43:07,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:43:07,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-10-14 21:43:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:07,570 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:43:07,570 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:43:07,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:43:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-14 21:43:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:43:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-10-14 21:43:07,577 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2019-10-14 21:43:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:07,577 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-10-14 21:43:07,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:43:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-10-14 21:43:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:43:07,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:07,578 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:07,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:07,783 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1849969864, now seen corresponding path program 11 times [2019-10-14 21:43:07,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:07,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436865053] [2019-10-14 21:43:07,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:43:08,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436865053] [2019-10-14 21:43:08,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529586750] [2019-10-14 21:43:08,023 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,209 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:43:18,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:18,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:43:18,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:43:18,251 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:18,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:43:18,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446956543] [2019-10-14 21:43:18,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:43:18,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:43:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:18,253 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 22 states. [2019-10-14 21:43:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,422 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2019-10-14 21:43:18,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:43:18,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2019-10-14 21:43:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,423 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:43:18,423 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:43:18,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:43:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-10-14 21:43:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:43:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2019-10-14 21:43:18,430 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2019-10-14 21:43:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,430 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2019-10-14 21:43:18,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:43:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2019-10-14 21:43:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:43:18,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,432 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,641 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1260713066, now seen corresponding path program 12 times [2019-10-14 21:43:18,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731881439] [2019-10-14 21:43:18,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:43:18,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731881439] [2019-10-14 21:43:18,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395468946] [2019-10-14 21:43:18,922 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 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 [2019-10-14 21:43:19,383 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:43:19,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:19,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:43:19,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-10-14 21:43:19,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2019-10-14 21:43:19,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145888051] [2019-10-14 21:43:19,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:43:19,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:43:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:43:19,544 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 31 states. [2019-10-14 21:43:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:19,968 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2019-10-14 21:43:19,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:43:19,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2019-10-14 21:43:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:19,971 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:43:19,971 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:43:19,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:43:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:43:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 21:43:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:43:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2019-10-14 21:43:19,980 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 85 [2019-10-14 21:43:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:19,980 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2019-10-14 21:43:19,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:43:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2019-10-14 21:43:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 21:43:19,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:19,981 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:20,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,187 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1421493194, now seen corresponding path program 13 times [2019-10-14 21:43:20,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:20,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455106423] [2019-10-14 21:43:20,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:43:20,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455106423] [2019-10-14 21:43:20,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782222313] [2019-10-14 21:43:20,476 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 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 [2019-10-14 21:43:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:43:20,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-14 21:43:20,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:20,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:43:20,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214670419] [2019-10-14 21:43:20,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:43:20,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:20,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:43:20,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:43:20,572 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 25 states. [2019-10-14 21:43:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:20,751 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2019-10-14 21:43:20,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:43:20,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2019-10-14 21:43:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:20,752 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:43:20,753 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:43:20,754 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:43:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:43:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:43:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:43:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2019-10-14 21:43:20,760 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2019-10-14 21:43:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:20,761 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2019-10-14 21:43:20,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:43:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2019-10-14 21:43:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 21:43:20,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:20,762 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:20,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,967 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash 911570220, now seen corresponding path program 14 times [2019-10-14 21:43:20,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:20,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559140741] [2019-10-14 21:43:20,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:43:21,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559140741] [2019-10-14 21:43:21,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434294358] [2019-10-14 21:43:21,307 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 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 [2019-10-14 21:43:21,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:21,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:21,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:43:21,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-14 21:43:21,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:21,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:43:21,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362435160] [2019-10-14 21:43:21,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:43:21,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:43:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:43:21,429 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 26 states. [2019-10-14 21:43:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:21,638 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2019-10-14 21:43:21,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:43:21,639 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2019-10-14 21:43:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:21,640 INFO L225 Difference]: With dead ends: 148 [2019-10-14 21:43:21,640 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 21:43:21,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:43:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 21:43:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 21:43:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:43:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2019-10-14 21:43:21,647 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 94 [2019-10-14 21:43:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:21,648 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2019-10-14 21:43:21,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:43:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2019-10-14 21:43:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 21:43:21,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:21,649 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:21,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,853 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 501863950, now seen corresponding path program 15 times [2019-10-14 21:43:21,853 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:21,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540331595] [2019-10-14 21:43:21,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:43:22,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540331595] [2019-10-14 21:43:22,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255609030] [2019-10-14 21:43:22,241 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 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 [2019-10-14 21:43:22,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:43:22,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:22,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:22,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-10-14 21:43:22,605 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:22,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2019-10-14 21:43:22,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548931248] [2019-10-14 21:43:22,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:43:22,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:43:22,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:43:22,608 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 34 states. [2019-10-14 21:43:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,837 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2019-10-14 21:43:22,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:43:22,838 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 96 [2019-10-14 21:43:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,839 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:43:22,839 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:43:22,840 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:43:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:43:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2019-10-14 21:43:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:43:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-10-14 21:43:22,845 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 96 [2019-10-14 21:43:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,846 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-10-14 21:43:22,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:43:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-10-14 21:43:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:43:22,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,847 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:23,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,055 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,055 INFO L82 PathProgramCache]: Analyzing trace with hash -779530644, now seen corresponding path program 16 times [2019-10-14 21:43:23,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695259478] [2019-10-14 21:43:23,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:43:23,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695259478] [2019-10-14 21:43:23,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897551636] [2019-10-14 21:43:23,472 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:23,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:23,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:43:23,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 21:43:23,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:23,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:43:23,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2735199] [2019-10-14 21:43:23,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:43:23,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:23,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:43:23,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:43:23,588 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 28 states. [2019-10-14 21:43:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:23,795 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2019-10-14 21:43:23,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:43:23,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 101 [2019-10-14 21:43:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:23,797 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:43:23,797 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:43:23,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:43:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:43:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-10-14 21:43:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:43:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2019-10-14 21:43:23,805 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2019-10-14 21:43:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:23,805 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2019-10-14 21:43:23,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:43:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2019-10-14 21:43:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:43:23,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,806 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:24,010 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash 554863434, now seen corresponding path program 17 times [2019-10-14 21:43:24,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404626832] [2019-10-14 21:43:24,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 4 proven. 576 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:43:24,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404626832] [2019-10-14 21:43:24,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110854446] [2019-10-14 21:43:24,528 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true