/usr/bin/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:06:53,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:06:53,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:06:53,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:06:53,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:06:53,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:06:53,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:06:53,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:06:53,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:06:53,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:06:53,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:06:53,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:06:53,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:06:53,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:06:53,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:06:53,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:06:53,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:06:53,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:06:53,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:06:53,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:06:53,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:06:53,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:06:53,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:06:53,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:06:53,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:06:53,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:06:53,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:06:53,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:06:53,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:06:53,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:06:53,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:06:53,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:06:53,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:06:53,548 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:06:53,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:06:53,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:06:53,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:06:53,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:06:53,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:06:53,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:06:53,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:06:53,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:06:53,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:06:53,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:06:53,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:06:53,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:06:53,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:06:53,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:06:53,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:06:53,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:06:53,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:06:53,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:06:53,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:06:53,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:06:53,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:06:53,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:06:53,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:06:53,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:06:53,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:06:53,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:06:53,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:06:53,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:06:53,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:06:53,900 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:06:53,902 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 21:06:53,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87c0dada5/169685502c834de8b0124019c107fb4c/FLAG07fdbcc50 [2020-08-18 21:06:54,423 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:06:54,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 21:06:54,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87c0dada5/169685502c834de8b0124019c107fb4c/FLAG07fdbcc50 [2020-08-18 21:06:54,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87c0dada5/169685502c834de8b0124019c107fb4c [2020-08-18 21:06:54,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:06:54,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:06:54,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:06:54,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:06:54,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:06:54,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:06:54" (1/1) ... [2020-08-18 21:06:54,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a0aa91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:54, skipping insertion in model container [2020-08-18 21:06:54,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:06:54" (1/1) ... [2020-08-18 21:06:54,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:06:54,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:06:55,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:06:55,058 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:06:55,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:06:55,099 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:06:55,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55 WrapperNode [2020-08-18 21:06:55,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:06:55,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:06:55,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:06:55,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:06:55,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... [2020-08-18 21:06:55,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:06:55,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:06:55,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:06:55,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:06:55,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 21:06:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:06:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:06:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:06:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:06:55,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:06:55,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:06:55,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:06:55,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:06:55,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:06:55,663 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:06:55,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:06:55 BoogieIcfgContainer [2020-08-18 21:06:55,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:06:55,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:06:55,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:06:55,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:06:55,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:06:54" (1/3) ... [2020-08-18 21:06:55,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e202589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:06:55, skipping insertion in model container [2020-08-18 21:06:55,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:55" (2/3) ... [2020-08-18 21:06:55,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e202589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:06:55, skipping insertion in model container [2020-08-18 21:06:55,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:06:55" (3/3) ... [2020-08-18 21:06:55,678 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-18 21:06:55,687 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:06:55,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:06:55,708 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:06:55,732 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:06:55,732 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:06:55,732 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:06:55,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:06:55,733 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:06:55,733 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:06:55,733 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:06:55,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:06:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 21:06:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:06:55,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:55,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:55,761 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-18 21:06:55,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:55,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263753221] [2020-08-18 21:06:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:55,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263753221] [2020-08-18 21:06:56,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919543522] [2020-08-18 21:06:56,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,027 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-18 21:06:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,088 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-18 21:06:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:06:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,102 INFO L225 Difference]: With dead ends: 87 [2020-08-18 21:06:56,102 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 21:06:56,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 21:06:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-18 21:06:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 21:06:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-18 21:06:56,158 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-18 21:06:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,159 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-18 21:06:56,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-18 21:06:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:06:56,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:06:56,162 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-18 21:06:56,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725901664] [2020-08-18 21:06:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725901664] [2020-08-18 21:06:56,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646909626] [2020-08-18 21:06:56,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,247 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-18 21:06:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,301 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-18 21:06:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:06:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,309 INFO L225 Difference]: With dead ends: 117 [2020-08-18 21:06:56,309 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 21:06:56,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 21:06:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 21:06:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 21:06:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-18 21:06:56,323 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-18 21:06:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,324 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-18 21:06:56,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-18 21:06:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:06:56,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:06:56,326 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-18 21:06:56,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346249218] [2020-08-18 21:06:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346249218] [2020-08-18 21:06:56,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569677721] [2020-08-18 21:06:56,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,384 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-18 21:06:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,406 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-18 21:06:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:06:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,408 INFO L225 Difference]: With dead ends: 108 [2020-08-18 21:06:56,408 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 21:06:56,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 21:06:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-18 21:06:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 21:06:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-18 21:06:56,421 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-18 21:06:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,421 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-18 21:06:56,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-18 21:06:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:06:56,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:06:56,423 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-18 21:06:56,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620984760] [2020-08-18 21:06:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620984760] [2020-08-18 21:06:56,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186212129] [2020-08-18 21:06:56,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,507 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-18 21:06:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,531 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-18 21:06:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:06:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,534 INFO L225 Difference]: With dead ends: 136 [2020-08-18 21:06:56,534 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 21:06:56,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 21:06:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-18 21:06:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 21:06:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-18 21:06:56,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-18 21:06:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,548 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-18 21:06:56,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-18 21:06:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:06:56,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:06:56,550 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-18 21:06:56,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619821416] [2020-08-18 21:06:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619821416] [2020-08-18 21:06:56,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652437629] [2020-08-18 21:06:56,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,595 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-18 21:06:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,636 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-18 21:06:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:06:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,639 INFO L225 Difference]: With dead ends: 224 [2020-08-18 21:06:56,639 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 21:06:56,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 21:06:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-18 21:06:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 21:06:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-18 21:06:56,659 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-18 21:06:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,660 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-18 21:06:56,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-18 21:06:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:06:56,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:06:56,663 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-18 21:06:56,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545537751] [2020-08-18 21:06:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545537751] [2020-08-18 21:06:56,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165705446] [2020-08-18 21:06:56,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,748 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-18 21:06:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,776 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-18 21:06:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:06:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,779 INFO L225 Difference]: With dead ends: 201 [2020-08-18 21:06:56,780 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 21:06:56,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 21:06:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 21:06:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 21:06:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-18 21:06:56,807 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-18 21:06:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,809 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-18 21:06:56,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-18 21:06:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:06:56,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:06:56,811 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-18 21:06:56,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091798550] [2020-08-18 21:06:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091798550] [2020-08-18 21:06:56,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596549436] [2020-08-18 21:06:56,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,869 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-18 21:06:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,907 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-18 21:06:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:06:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,911 INFO L225 Difference]: With dead ends: 252 [2020-08-18 21:06:56,911 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 21:06:56,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 21:06:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-18 21:06:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 21:06:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-18 21:06:56,924 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-18 21:06:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,925 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-18 21:06:56,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-18 21:06:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:06:56,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:06:56,927 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-18 21:06:56,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123787598] [2020-08-18 21:06:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123787598] [2020-08-18 21:06:56,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:56,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787561845] [2020-08-18 21:06:56,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:56,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,955 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-18 21:06:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,977 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-18 21:06:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:56,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:06:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,979 INFO L225 Difference]: With dead ends: 432 [2020-08-18 21:06:56,979 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 21:06:56,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 21:06:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 21:06:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 21:06:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-18 21:06:56,995 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-18 21:06:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,996 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-18 21:06:56,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-18 21:06:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:06:56,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:06:56,998 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-18 21:06:56,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632776922] [2020-08-18 21:06:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632776922] [2020-08-18 21:06:57,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198725364] [2020-08-18 21:06:57,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,027 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-18 21:06:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,047 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-18 21:06:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:06:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,049 INFO L225 Difference]: With dead ends: 384 [2020-08-18 21:06:57,050 INFO L226 Difference]: Without dead ends: 262 [2020-08-18 21:06:57,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-18 21:06:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-18 21:06:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-18 21:06:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-18 21:06:57,061 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-18 21:06:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,062 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-18 21:06:57,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-18 21:06:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:06:57,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:06:57,064 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-18 21:06:57,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400487742] [2020-08-18 21:06:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400487742] [2020-08-18 21:06:57,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586994613] [2020-08-18 21:06:57,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,089 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-18 21:06:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,108 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-18 21:06:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:06:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,111 INFO L225 Difference]: With dead ends: 476 [2020-08-18 21:06:57,112 INFO L226 Difference]: Without dead ends: 474 [2020-08-18 21:06:57,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-18 21:06:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-18 21:06:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 21:06:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-18 21:06:57,125 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-18 21:06:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,126 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-18 21:06:57,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-18 21:06:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:06:57,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:06:57,128 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-18 21:06:57,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54571031] [2020-08-18 21:06:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54571031] [2020-08-18 21:06:57,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982586618] [2020-08-18 21:06:57,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,154 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-18 21:06:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,179 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-18 21:06:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:06:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,183 INFO L225 Difference]: With dead ends: 844 [2020-08-18 21:06:57,183 INFO L226 Difference]: Without dead ends: 498 [2020-08-18 21:06:57,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-18 21:06:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-18 21:06:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-18 21:06:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-18 21:06:57,202 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-18 21:06:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,203 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-18 21:06:57,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-18 21:06:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:06:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:06:57,205 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-18 21:06:57,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697222991] [2020-08-18 21:06:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697222991] [2020-08-18 21:06:57,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818459884] [2020-08-18 21:06:57,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,240 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-18 21:06:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,262 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-18 21:06:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:06:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,265 INFO L225 Difference]: With dead ends: 744 [2020-08-18 21:06:57,265 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 21:06:57,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 21:06:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-18 21:06:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-18 21:06:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-18 21:06:57,282 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-18 21:06:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,282 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-18 21:06:57,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-18 21:06:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:06:57,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:06:57,284 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-18 21:06:57,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432866595] [2020-08-18 21:06:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432866595] [2020-08-18 21:06:57,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551547261] [2020-08-18 21:06:57,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,308 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-18 21:06:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,336 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-18 21:06:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:06:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,342 INFO L225 Difference]: With dead ends: 908 [2020-08-18 21:06:57,342 INFO L226 Difference]: Without dead ends: 906 [2020-08-18 21:06:57,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-18 21:06:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-18 21:06:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-18 21:06:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-18 21:06:57,364 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-18 21:06:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,365 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-18 21:06:57,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-18 21:06:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:06:57,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:06:57,367 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-18 21:06:57,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136158714] [2020-08-18 21:06:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136158714] [2020-08-18 21:06:57,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041687109] [2020-08-18 21:06:57,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,401 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-18 21:06:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,432 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-18 21:06:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:06:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,438 INFO L225 Difference]: With dead ends: 1660 [2020-08-18 21:06:57,438 INFO L226 Difference]: Without dead ends: 970 [2020-08-18 21:06:57,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-18 21:06:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-18 21:06:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-18 21:06:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-18 21:06:57,473 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-18 21:06:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,474 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-18 21:06:57,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-18 21:06:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:06:57,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:06:57,476 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-18 21:06:57,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712490146] [2020-08-18 21:06:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712490146] [2020-08-18 21:06:57,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123139220] [2020-08-18 21:06:57,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,502 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-18 21:06:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,550 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-18 21:06:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:06:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,556 INFO L225 Difference]: With dead ends: 1452 [2020-08-18 21:06:57,556 INFO L226 Difference]: Without dead ends: 986 [2020-08-18 21:06:57,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-18 21:06:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-18 21:06:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-18 21:06:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-18 21:06:57,585 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-18 21:06:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,586 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-18 21:06:57,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-18 21:06:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:06:57,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:06:57,588 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-18 21:06:57,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8519674] [2020-08-18 21:06:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8519674] [2020-08-18 21:06:57,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367880363] [2020-08-18 21:06:57,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,613 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-18 21:06:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,647 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-18 21:06:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:06:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,656 INFO L225 Difference]: With dead ends: 1740 [2020-08-18 21:06:57,656 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 21:06:57,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 21:06:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-18 21:06:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-18 21:06:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-18 21:06:57,698 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-18 21:06:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,698 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-18 21:06:57,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-18 21:06:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:06:57,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:06:57,701 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-18 21:06:57,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796221451] [2020-08-18 21:06:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796221451] [2020-08-18 21:06:57,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756011795] [2020-08-18 21:06:57,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,723 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-18 21:06:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,768 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-18 21:06:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:06:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,778 INFO L225 Difference]: With dead ends: 3276 [2020-08-18 21:06:57,778 INFO L226 Difference]: Without dead ends: 1898 [2020-08-18 21:06:57,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-18 21:06:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-18 21:06:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-18 21:06:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-18 21:06:57,840 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-18 21:06:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,840 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-18 21:06:57,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-18 21:06:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:06:57,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:06:57,843 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-18 21:06:57,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179359619] [2020-08-18 21:06:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179359619] [2020-08-18 21:06:57,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:57,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248435306] [2020-08-18 21:06:57,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:57,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,868 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-18 21:06:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,914 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-18 21:06:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:57,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:06:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,927 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 21:06:57,927 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 21:06:57,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 21:06:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-18 21:06:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-18 21:06:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-18 21:06:58,011 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-18 21:06:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,012 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-18 21:06:58,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-18 21:06:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:06:58,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:06:58,017 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-18 21:06:58,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041490280] [2020-08-18 21:06:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:58,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041490280] [2020-08-18 21:06:58,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:58,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120273938] [2020-08-18 21:06:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,046 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-18 21:06:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:58,154 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-18 21:06:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:58,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:06:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:58,176 INFO L225 Difference]: With dead ends: 3340 [2020-08-18 21:06:58,176 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 21:06:58,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 21:06:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-18 21:06:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-18 21:06:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-18 21:06:58,281 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-18 21:06:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,281 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-18 21:06:58,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-18 21:06:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:06:58,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:06:58,289 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-18 21:06:58,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455850761] [2020-08-18 21:06:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:58,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455850761] [2020-08-18 21:06:58,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:58,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055095251] [2020-08-18 21:06:58,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:58,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,314 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-18 21:06:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:58,392 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-18 21:06:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:58,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:06:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:58,411 INFO L225 Difference]: With dead ends: 6476 [2020-08-18 21:06:58,411 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 21:06:58,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 21:06:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-18 21:06:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-18 21:06:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-18 21:06:58,521 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-18 21:06:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,521 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-18 21:06:58,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-18 21:06:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:06:58,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:06:58,527 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-18 21:06:58,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720326327] [2020-08-18 21:06:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:58,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720326327] [2020-08-18 21:06:58,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:58,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338885776] [2020-08-18 21:06:58,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:58,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:58,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,559 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-18 21:06:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:58,669 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-18 21:06:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:58,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:06:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:58,686 INFO L225 Difference]: With dead ends: 5580 [2020-08-18 21:06:58,686 INFO L226 Difference]: Without dead ends: 3786 [2020-08-18 21:06:58,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-18 21:06:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-18 21:06:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-18 21:06:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-18 21:06:58,805 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-18 21:06:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,805 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-18 21:06:58,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-18 21:06:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:06:58,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:06:58,810 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-18 21:06:58,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80546771] [2020-08-18 21:06:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:58,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80546771] [2020-08-18 21:06:58,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:58,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094378314] [2020-08-18 21:06:58,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:58,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:58,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:58,849 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-18 21:06:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:58,966 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-18 21:06:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:58,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:06:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,008 INFO L225 Difference]: With dead ends: 10956 [2020-08-18 21:06:59,009 INFO L226 Difference]: Without dead ends: 7306 [2020-08-18 21:06:59,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-18 21:06:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-18 21:06:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 21:06:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-18 21:06:59,233 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-18 21:06:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:59,234 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-18 21:06:59,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-18 21:06:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:06:59,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:06:59,311 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-18 21:06:59,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944877486] [2020-08-18 21:06:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:59,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944877486] [2020-08-18 21:06:59,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:59,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37359271] [2020-08-18 21:06:59,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:59,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:59,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,355 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-18 21:06:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:59,475 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-18 21:06:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:59,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:06:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,491 INFO L225 Difference]: With dead ends: 8076 [2020-08-18 21:06:59,491 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 21:06:59,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 21:06:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-18 21:06:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 21:06:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-18 21:06:59,679 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-18 21:06:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:59,680 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-18 21:06:59,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-18 21:06:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:06:59,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:06:59,689 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-18 21:06:59,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638684466] [2020-08-18 21:06:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:59,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638684466] [2020-08-18 21:06:59,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:59,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040356713] [2020-08-18 21:06:59,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:59,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,727 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-18 21:06:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:59,910 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-18 21:06:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:59,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:06:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,931 INFO L225 Difference]: With dead ends: 12172 [2020-08-18 21:06:59,931 INFO L226 Difference]: Without dead ends: 12170 [2020-08-18 21:06:59,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-18 21:07:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-18 21:07:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-18 21:07:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-18 21:07:00,180 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-18 21:07:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,181 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-18 21:07:00,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-18 21:07:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:07:00,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:07:00,198 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-18 21:07:00,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472208993] [2020-08-18 21:07:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472208993] [2020-08-18 21:07:00,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015187291] [2020-08-18 21:07:00,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,221 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-18 21:07:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,413 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-18 21:07:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:07:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,447 INFO L225 Difference]: With dead ends: 25228 [2020-08-18 21:07:00,447 INFO L226 Difference]: Without dead ends: 14218 [2020-08-18 21:07:00,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-18 21:07:00,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-18 21:07:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-18 21:07:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-18 21:07:00,894 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-18 21:07:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,894 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-18 21:07:00,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-18 21:07:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:07:00,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:07:00,913 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-18 21:07:00,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933972032] [2020-08-18 21:07:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933972032] [2020-08-18 21:07:00,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977459686] [2020-08-18 21:07:00,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,951 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-18 21:07:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,137 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-18 21:07:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:07:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,164 INFO L225 Difference]: With dead ends: 21516 [2020-08-18 21:07:01,164 INFO L226 Difference]: Without dead ends: 14602 [2020-08-18 21:07:01,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-18 21:07:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-18 21:07:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-18 21:07:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-18 21:07:01,566 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-18 21:07:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,567 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-18 21:07:01,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-18 21:07:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:07:01,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 21:07:01,585 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-18 21:07:01,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261275093] [2020-08-18 21:07:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261275093] [2020-08-18 21:07:01,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4345480] [2020-08-18 21:07:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,607 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-18 21:07:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,872 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-18 21:07:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:07:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,913 INFO L225 Difference]: With dead ends: 23562 [2020-08-18 21:07:01,913 INFO L226 Difference]: Without dead ends: 23560 [2020-08-18 21:07:01,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-18 21:07:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-18 21:07:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-18 21:07:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-18 21:07:02,432 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-18 21:07:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,432 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-18 21:07:02,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-18 21:07:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:07:02,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 21:07:02,464 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-18 21:07:02,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862143188] [2020-08-18 21:07:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862143188] [2020-08-18 21:07:02,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604683342] [2020-08-18 21:07:02,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,488 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-18 21:07:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:03,345 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-18 21:07:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:03,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:07:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:03,346 INFO L225 Difference]: With dead ends: 50184 [2020-08-18 21:07:03,346 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:07:03,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:07:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:07:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:07:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:07:03,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-18 21:07:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:03,405 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:07:03,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:03,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:07:03,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:07:03,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 21:07:03,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:07:03,432 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:07:03,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:03,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:03,432 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:07:03,432 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:07:03,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:07:03,433 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-18 21:07:03,433 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-18 21:07:03,433 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,433 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,433 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,433 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,433 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-18 21:07:03,434 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-18 21:07:03,435 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-18 21:07:03,435 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-18 21:07:03,435 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-18 21:07:03,435 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-18 21:07:03,435 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,435 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,435 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-18 21:07:03,435 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,436 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-18 21:07:03,437 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-18 21:07:03,437 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,437 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:07:03,437 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-18 21:07:03,437 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-18 21:07:03,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:03 BoogieIcfgContainer [2020-08-18 21:07:03,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:03,450 INFO L168 Benchmark]: Toolchain (without parser) took 8631.13 ms. Allocated memory was 140.5 MB in the beginning and 659.6 MB in the end (delta: 519.0 MB). Free memory was 104.1 MB in the beginning and 543.6 MB in the end (delta: -439.5 MB). Peak memory consumption was 79.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:03,451 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:07:03,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.57 ms. Allocated memory is still 140.5 MB. Free memory was 103.9 MB in the beginning and 92.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:03,452 INFO L168 Benchmark]: Boogie Preprocessor took 115.89 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 181.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:03,453 INFO L168 Benchmark]: RCFGBuilder took 452.63 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 161.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:03,453 INFO L168 Benchmark]: TraceAbstraction took 7777.27 ms. Allocated memory was 202.9 MB in the beginning and 659.6 MB in the end (delta: 456.7 MB). Free memory was 160.5 MB in the beginning and 543.6 MB in the end (delta: -383.2 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:03,455 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.57 ms. Allocated memory is still 140.5 MB. Free memory was 103.9 MB in the beginning and 92.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.89 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 181.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 452.63 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 161.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7777.27 ms. Allocated memory was 202.9 MB in the beginning and 659.6 MB in the end (delta: 456.7 MB). Free memory was 160.5 MB in the beginning and 543.6 MB in the end (delta: -383.2 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.6s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...