/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:29:08,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:29:08,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:29:08,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:29:08,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:29:08,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:29:08,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:29:08,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:29:08,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:29:08,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:29:08,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:29:08,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:29:08,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:29:08,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:29:08,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:29:08,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:29:08,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:29:08,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:29:08,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:29:08,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:29:08,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:29:08,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:29:08,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:29:08,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:29:08,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:29:08,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:29:08,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:29:08,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:29:08,911 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 [2020-09-21 10:29:08,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:29:08,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:29:08,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:29:08,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:29:08,965 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:29:08,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:29:08,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:29:08,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:29:08,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:29:08,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:29:08,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:29:08,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:29:08,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:29:08,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:29:08,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:29:08,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:29:08,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:29:08,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:29:08,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:29:08,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:29:08,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:29:08,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:29:08,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:29:08,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:29:08,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:29:08,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:29:08,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:29:08,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:29:08,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:29:08,972 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 -> false [2020-09-21 10:29:09,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:29:09,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:29:09,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:29:09,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:29:09,462 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:29:09,463 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-21 10:29:09,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103e2d4c8/e6a69f2d5e88425a9f6f0636ee6817be/FLAGa4010ebe0 [2020-09-21 10:29:10,083 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:29:10,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-21 10:29:10,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103e2d4c8/e6a69f2d5e88425a9f6f0636ee6817be/FLAGa4010ebe0 [2020-09-21 10:29:10,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103e2d4c8/e6a69f2d5e88425a9f6f0636ee6817be [2020-09-21 10:29:10,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:29:10,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:29:10,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:10,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:29:10,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:29:10,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7ae4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10, skipping insertion in model container [2020-09-21 10:29:10,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:29:10,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:29:10,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:10,688 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:29:10,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:10,732 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:29:10,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10 WrapperNode [2020-09-21 10:29:10,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:10,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:29:10,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:29:10,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:29:10,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:29:10,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:29:10,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:29:10,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:29:10,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (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 [2020-09-21 10:29:10,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:29:10,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:29:10,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:29:10,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:29:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:29:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:29:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:29:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:29:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:29:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:29:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:29:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:29:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:29:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:29:11,195 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:29:11,196 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:29:11,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:11 BoogieIcfgContainer [2020-09-21 10:29:11,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:29:11,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:29:11,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:29:11,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:29:11,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:29:10" (1/3) ... [2020-09-21 10:29:11,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebfdd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:11, skipping insertion in model container [2020-09-21 10:29:11,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (2/3) ... [2020-09-21 10:29:11,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebfdd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:11, skipping insertion in model container [2020-09-21 10:29:11,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:11" (3/3) ... [2020-09-21 10:29:11,214 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-21 10:29:11,229 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:29:11,241 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:29:11,273 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:29:11,311 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:29:11,312 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:29:11,312 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:29:11,312 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:29:11,312 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:29:11,312 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:29:11,313 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:29:11,313 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:29:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-21 10:29:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:29:11,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:11,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:11,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-09-21 10:29:11,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:11,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771170413] [2020-09-21 10:29:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:11,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:11,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771170413] [2020-09-21 10:29:11,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:11,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:29:11,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2625099] [2020-09-21 10:29:11,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:29:11,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:29:11,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:29:11,604 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-21 10:29:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:11,712 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-09-21 10:29:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:29:11,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-09-21 10:29:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:11,726 INFO L225 Difference]: With dead ends: 42 [2020-09-21 10:29:11,726 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 10:29:11,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:29:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 10:29:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 10:29:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:29:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 10:29:11,777 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-09-21 10:29:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:11,778 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 10:29:11,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:29:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 10:29:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:29:11,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:11,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:11,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:29:11,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-09-21 10:29:11,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:11,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049425018] [2020-09-21 10:29:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:11,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:11,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049425018] [2020-09-21 10:29:11,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:11,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:29:11,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488473130] [2020-09-21 10:29:11,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:29:11,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:29:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:29:11,884 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-09-21 10:29:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:11,963 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-09-21 10:29:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:29:11,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-21 10:29:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:11,967 INFO L225 Difference]: With dead ends: 35 [2020-09-21 10:29:11,967 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 10:29:11,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:29:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 10:29:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-21 10:29:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 10:29:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-09-21 10:29:11,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-09-21 10:29:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:11,979 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-09-21 10:29:11,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:29:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-09-21 10:29:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:29:11,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:11,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:11,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:29:11,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-09-21 10:29:11,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:11,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768952071] [2020-09-21 10:29:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:12,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768952071] [2020-09-21 10:29:12,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:12,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:29:12,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281071012] [2020-09-21 10:29:12,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:29:12,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:29:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:29:12,110 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-09-21 10:29:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:12,224 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-09-21 10:29:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:29:12,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 10:29:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:12,226 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:29:12,226 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:29:12,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:29:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:29:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-09-21 10:29:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:29:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-21 10:29:12,234 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-21 10:29:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:12,235 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-21 10:29:12,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:29:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-21 10:29:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:29:12,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:12,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:12,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:29:12,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-09-21 10:29:12,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:12,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466581209] [2020-09-21 10:29:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:12,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466581209] [2020-09-21 10:29:12,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:12,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:29:12,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674631193] [2020-09-21 10:29:12,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:29:12,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:12,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:29:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:12,323 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-21 10:29:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:12,451 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-09-21 10:29:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:29:12,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-21 10:29:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:12,453 INFO L225 Difference]: With dead ends: 56 [2020-09-21 10:29:12,454 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 10:29:12,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 10:29:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-09-21 10:29:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 10:29:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-09-21 10:29:12,463 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-09-21 10:29:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:12,464 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-09-21 10:29:12,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:29:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-09-21 10:29:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:29:12,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:12,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:12,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:29:12,466 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-09-21 10:29:12,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:12,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052692086] [2020-09-21 10:29:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:12,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052692086] [2020-09-21 10:29:12,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:12,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:29:12,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008649139] [2020-09-21 10:29:12,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:29:12,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:29:12,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:12,609 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-09-21 10:29:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:12,752 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-09-21 10:29:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:29:12,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 10:29:12,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:12,753 INFO L225 Difference]: With dead ends: 67 [2020-09-21 10:29:12,753 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:29:12,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:29:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 10:29:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:29:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-21 10:29:12,763 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-09-21 10:29:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:12,763 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-21 10:29:12,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:29:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-21 10:29:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:29:12,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:12,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:12,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:29:12,765 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-09-21 10:29:12,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:12,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443856855] [2020-09-21 10:29:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 10:29:12,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443856855] [2020-09-21 10:29:12,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:12,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:29:12,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502198438] [2020-09-21 10:29:12,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:29:12,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:29:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:12,874 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-09-21 10:29:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:12,966 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-09-21 10:29:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:29:12,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 10:29:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:12,969 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:29:12,969 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:29:12,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:29:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:29:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 10:29:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:29:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-21 10:29:12,978 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-09-21 10:29:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:12,978 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-21 10:29:12,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:29:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-21 10:29:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:29:12,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:12,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:12,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:29:12,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:12,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-09-21 10:29:12,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:12,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484198614] [2020-09-21 10:29:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:13,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484198614] [2020-09-21 10:29:13,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:13,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:29:13,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776861264] [2020-09-21 10:29:13,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:29:13,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:13,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:29:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:29:13,085 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-09-21 10:29:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:13,202 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-09-21 10:29:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:29:13,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-21 10:29:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:13,204 INFO L225 Difference]: With dead ends: 77 [2020-09-21 10:29:13,204 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 10:29:13,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:29:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 10:29:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-09-21 10:29:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 10:29:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-09-21 10:29:13,212 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-09-21 10:29:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:13,213 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-09-21 10:29:13,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:29:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-09-21 10:29:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:29:13,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:13,214 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:13,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:29:13,215 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-09-21 10:29:13,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:13,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470330887] [2020-09-21 10:29:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:13,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470330887] [2020-09-21 10:29:13,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:13,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:29:13,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449282499] [2020-09-21 10:29:13,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:29:13,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:29:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:29:13,319 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-09-21 10:29:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:13,430 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-09-21 10:29:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:29:13,431 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-09-21 10:29:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:13,432 INFO L225 Difference]: With dead ends: 88 [2020-09-21 10:29:13,432 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 10:29:13,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:29:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 10:29:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-09-21 10:29:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 10:29:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-09-21 10:29:13,441 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-09-21 10:29:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:13,441 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-09-21 10:29:13,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:29:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-09-21 10:29:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:29:13,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:13,443 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:13,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:29:13,443 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-09-21 10:29:13,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:13,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228712706] [2020-09-21 10:29:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:13,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228712706] [2020-09-21 10:29:13,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:13,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:29:13,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578199167] [2020-09-21 10:29:13,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:29:13,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:29:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:29:13,601 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-09-21 10:29:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:13,746 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-09-21 10:29:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:29:13,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-09-21 10:29:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:13,748 INFO L225 Difference]: With dead ends: 99 [2020-09-21 10:29:13,748 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 10:29:13,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:29:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 10:29:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-09-21 10:29:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 10:29:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-09-21 10:29:13,757 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-09-21 10:29:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:13,757 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-09-21 10:29:13,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:29:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-09-21 10:29:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 10:29:13,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:13,759 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:13,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:29:13,759 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:13,760 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-09-21 10:29:13,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:13,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524427299] [2020-09-21 10:29:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:13,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524427299] [2020-09-21 10:29:13,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:13,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:29:13,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291396155] [2020-09-21 10:29:13,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:29:13,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:13,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:29:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:29:13,895 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-09-21 10:29:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:14,031 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-09-21 10:29:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:29:14,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-21 10:29:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:14,032 INFO L225 Difference]: With dead ends: 110 [2020-09-21 10:29:14,032 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 10:29:14,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:29:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 10:29:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-09-21 10:29:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:29:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-09-21 10:29:14,040 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-09-21 10:29:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:14,040 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-09-21 10:29:14,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:29:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-09-21 10:29:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:29:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:14,042 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:14,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:29:14,042 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-09-21 10:29:14,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:14,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326590932] [2020-09-21 10:29:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:14,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:14,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326590932] [2020-09-21 10:29:14,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:14,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:29:14,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717328320] [2020-09-21 10:29:14,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:29:14,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:14,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:29:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:29:14,198 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-09-21 10:29:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:14,349 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-09-21 10:29:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:29:14,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-09-21 10:29:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:14,350 INFO L225 Difference]: With dead ends: 121 [2020-09-21 10:29:14,351 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 10:29:14,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:29:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 10:29:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-09-21 10:29:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 10:29:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-09-21 10:29:14,359 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-09-21 10:29:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:14,360 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-09-21 10:29:14,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:29:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-09-21 10:29:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 10:29:14,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:14,361 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:14,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:29:14,362 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:14,362 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-09-21 10:29:14,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:14,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939085167] [2020-09-21 10:29:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:14,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939085167] [2020-09-21 10:29:14,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:14,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:29:14,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850440525] [2020-09-21 10:29:14,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:29:14,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:29:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:29:14,533 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2020-09-21 10:29:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:14,718 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-09-21 10:29:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:29:14,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-21 10:29:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:14,722 INFO L225 Difference]: With dead ends: 132 [2020-09-21 10:29:14,722 INFO L226 Difference]: Without dead ends: 87 [2020-09-21 10:29:14,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:29:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-21 10:29:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-21 10:29:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 10:29:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-09-21 10:29:14,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-09-21 10:29:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:14,740 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-09-21 10:29:14,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:29:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-09-21 10:29:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:29:14,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:14,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:14,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:29:14,741 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:14,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-09-21 10:29:14,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:14,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679574264] [2020-09-21 10:29:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:14,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679574264] [2020-09-21 10:29:14,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:14,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:29:14,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442055929] [2020-09-21 10:29:14,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:29:14,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:14,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:29:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:29:14,960 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 14 states. [2020-09-21 10:29:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:15,149 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-09-21 10:29:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:29:15,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-09-21 10:29:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:15,151 INFO L225 Difference]: With dead ends: 143 [2020-09-21 10:29:15,151 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 10:29:15,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:29:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 10:29:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-09-21 10:29:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 10:29:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-09-21 10:29:15,159 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-09-21 10:29:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:15,160 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-09-21 10:29:15,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:29:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-09-21 10:29:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 10:29:15,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:15,161 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:15,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:29:15,162 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:15,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-09-21 10:29:15,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:15,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799269590] [2020-09-21 10:29:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:15,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:29:15,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799269590] [2020-09-21 10:29:15,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:15,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:29:15,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127581126] [2020-09-21 10:29:15,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:29:15,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:15,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:29:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:29:15,338 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 15 states. [2020-09-21 10:29:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:15,560 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-09-21 10:29:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:29:15,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-09-21 10:29:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:15,561 INFO L225 Difference]: With dead ends: 154 [2020-09-21 10:29:15,561 INFO L226 Difference]: Without dead ends: 101 [2020-09-21 10:29:15,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:29:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-21 10:29:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-09-21 10:29:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 10:29:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-09-21 10:29:15,569 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-09-21 10:29:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:15,569 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-09-21 10:29:15,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:29:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-09-21 10:29:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 10:29:15,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:15,571 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:15,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:29:15,571 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-09-21 10:29:15,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:15,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526256444] [2020-09-21 10:29:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-21 10:29:15,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526256444] [2020-09-21 10:29:15,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:15,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:29:15,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273356028] [2020-09-21 10:29:15,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:29:15,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:29:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:15,652 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 7 states. [2020-09-21 10:29:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:15,767 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-09-21 10:29:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:29:15,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-21 10:29:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:15,768 INFO L225 Difference]: With dead ends: 93 [2020-09-21 10:29:15,769 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 10:29:15,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:29:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 10:29:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-09-21 10:29:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 10:29:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-09-21 10:29:15,775 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 42 [2020-09-21 10:29:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:15,776 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-09-21 10:29:15,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:29:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-09-21 10:29:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:29:15,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:15,777 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:15,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:29:15,777 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1325635667, now seen corresponding path program 10 times [2020-09-21 10:29:15,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:15,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410702409] [2020-09-21 10:29:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-09-21 10:29:15,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410702409] [2020-09-21 10:29:15,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:15,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:29:15,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137563452] [2020-09-21 10:29:15,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:29:15,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:15,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:29:15,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:15,901 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 7 states. [2020-09-21 10:29:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:15,980 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-09-21 10:29:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:29:15,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-09-21 10:29:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:15,982 INFO L225 Difference]: With dead ends: 88 [2020-09-21 10:29:15,982 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:29:15,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:29:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:29:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:29:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:29:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:29:15,984 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-09-21 10:29:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:15,984 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:29:15,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:29:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:29:15,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:29:15,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:29:15,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:29:16,076 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:29:16,077 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 10:29:16,077 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:29:16,077 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:29:16,077 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:29:16,078 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:29:16,078 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:29:16,078 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-09-21 10:29:16,078 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-09-21 10:29:16,078 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-09-21 10:29:16,078 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-09-21 10:29:16,078 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-09-21 10:29:16,080 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-09-21 10:29:16,080 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-09-21 10:29:16,080 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-09-21 10:29:16,080 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-09-21 10:29:16,080 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 10:29:16,081 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-21 10:29:16,081 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-09-21 10:29:16,081 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 10:29:16,081 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 10:29:16,081 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 10:29:16,081 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 10:29:16,082 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 10:29:16,082 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 10:29:16,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:29:16 BoogieIcfgContainer [2020-09-21 10:29:16,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:29:16,139 INFO L168 Benchmark]: Toolchain (without parser) took 5724.81 ms. Allocated memory was 147.3 MB in the beginning and 280.5 MB in the end (delta: 133.2 MB). Free memory was 102.3 MB in the beginning and 216.7 MB in the end (delta: -114.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:16,140 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:29:16,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.22 ms. Allocated memory is still 147.3 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:16,145 INFO L168 Benchmark]: Boogie Preprocessor took 134.59 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 181.9 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:16,147 INFO L168 Benchmark]: RCFGBuilder took 332.47 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 167.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:16,148 INFO L168 Benchmark]: TraceAbstraction took 4931.08 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 167.5 MB in the beginning and 216.7 MB in the end (delta: -49.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:16,154 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.22 ms. Allocated memory is still 147.3 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.59 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 181.9 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.47 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 167.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4931.08 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 167.5 MB in the beginning and 216.7 MB in the end (delta: -49.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 16, TraceHistogramMax: 12, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 505 SDslu, 593 SDs, 0 SdLazy, 1177 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 94 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 23 HoareAnnotationTreeSize, 23 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 439 ConstructedInterpolants, 0 QuantifiedInterpolants, 28428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 328/836 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...