/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:34:08,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:34:08,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:34:08,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:34:08,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:34:08,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:34:08,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:34:08,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:34:08,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:34:08,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:34:08,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:34:08,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:34:08,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:34:08,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:34:08,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:34:08,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:34:08,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:34:08,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:34:08,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:34:08,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:34:08,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:34:08,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:34:08,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:34:08,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:34:08,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:34:08,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:34:08,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:34:08,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:34:08,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:34:08,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 20:34:08,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:34:08,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:34:08,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:34:08,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:34:08,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:34:08,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:34:08,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:34:08,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:34:08,987 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:34:08,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:34:08,988 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:34:08,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:34:08,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:34:08,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:34:08,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:34:08,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:34:08,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:34:08,990 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:34:08,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:34:08,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:34:08,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:34:08,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:34:08,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:34:08,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:34:08,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:34:08,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:34:08,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:34:08,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:34:08,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:34:08,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:34:08,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:34:08,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:34:08,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:34:08,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:34:09,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:34:09,327 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:34:09,330 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:34:09,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:34:09,333 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:34:09,333 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 20:34:09,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a88a92304/c2b2042738544f56b19bb724a674fd09/FLAG0c6a34f53 [2020-08-21 20:34:09,906 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:34:09,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 20:34:09,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a88a92304/c2b2042738544f56b19bb724a674fd09/FLAG0c6a34f53 [2020-08-21 20:34:10,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a88a92304/c2b2042738544f56b19bb724a674fd09 [2020-08-21 20:34:10,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:34:10,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:34:10,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:34:10,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:34:10,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:34:10,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47591dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10, skipping insertion in model container [2020-08-21 20:34:10,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:34:10,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:34:10,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:34:10,538 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:34:10,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:34:10,581 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:34:10,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10 WrapperNode [2020-08-21 20:34:10,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:34:10,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:34:10,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:34:10,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:34:10,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (1/1) ... [2020-08-21 20:34:10,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:34:10,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:34:10,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:34:10,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:34:10,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (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 [2020-08-21 20:34:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:34:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:34:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:34:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:34:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:34:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:34:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:34:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:34:11,076 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:34:11,077 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:34:11,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:34:11 BoogieIcfgContainer [2020-08-21 20:34:11,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:34:11,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:34:11,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:34:11,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:34:11,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:34:10" (1/3) ... [2020-08-21 20:34:11,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4214b975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:34:11, skipping insertion in model container [2020-08-21 20:34:11,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:10" (2/3) ... [2020-08-21 20:34:11,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4214b975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:34:11, skipping insertion in model container [2020-08-21 20:34:11,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:34:11" (3/3) ... [2020-08-21 20:34:11,101 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 20:34:11,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:34:11,123 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:34:11,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:34:11,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:34:11,178 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:34:11,178 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:34:11,178 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:34:11,179 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:34:11,179 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:34:11,179 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:34:11,179 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:34:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 20:34:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:34:11,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:11,216 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,224 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 20:34:11,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247210015] [2020-08-21 20:34:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247210015] [2020-08-21 20:34:11,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:11,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805506643] [2020-08-21 20:34:11,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:11,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,470 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 20:34:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,532 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 20:34:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:11,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 20:34:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,546 INFO L225 Difference]: With dead ends: 87 [2020-08-21 20:34:11,546 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 20:34:11,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 20:34:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 20:34:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 20:34:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 20:34:11,596 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 20:34:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,597 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 20:34:11,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 20:34:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:34:11,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:11,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:34:11,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 20:34:11,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939148815] [2020-08-21 20:34:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939148815] [2020-08-21 20:34:11,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:11,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912267988] [2020-08-21 20:34:11,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:11,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:11,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,671 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 20:34:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,699 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 20:34:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:11,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 20:34:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,702 INFO L225 Difference]: With dead ends: 117 [2020-08-21 20:34:11,703 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 20:34:11,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 20:34:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 20:34:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 20:34:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 20:34:11,729 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 20:34:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,730 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 20:34:11,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 20:34:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 20:34:11,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:11,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:34:11,733 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 20:34:11,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946536262] [2020-08-21 20:34:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946536262] [2020-08-21 20:34:11,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:11,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534353554] [2020-08-21 20:34:11,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:11,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,792 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 20:34:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,819 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 20:34:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:11,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 20:34:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,822 INFO L225 Difference]: With dead ends: 108 [2020-08-21 20:34:11,822 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 20:34:11,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 20:34:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 20:34:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 20:34:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 20:34:11,835 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 20:34:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,835 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 20:34:11,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 20:34:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 20:34:11,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:11,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:34:11,837 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 20:34:11,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328733219] [2020-08-21 20:34:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328733219] [2020-08-21 20:34:11,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:11,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014882214] [2020-08-21 20:34:11,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:11,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:11,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,896 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 20:34:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,921 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 20:34:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:11,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 20:34:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,924 INFO L225 Difference]: With dead ends: 136 [2020-08-21 20:34:11,924 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 20:34:11,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 20:34:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 20:34:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 20:34:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 20:34:11,939 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 20:34:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,939 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 20:34:11,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 20:34:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 20:34:11,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:11,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:34:11,941 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 20:34:11,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126234182] [2020-08-21 20:34:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126234182] [2020-08-21 20:34:12,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380177369] [2020-08-21 20:34:12,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,021 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 20:34:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,049 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 20:34:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 20:34:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,053 INFO L225 Difference]: With dead ends: 224 [2020-08-21 20:34:12,053 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 20:34:12,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 20:34:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 20:34:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 20:34:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 20:34:12,070 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 20:34:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,070 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 20:34:12,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 20:34:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:34:12,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:34:12,073 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 20:34:12,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829640996] [2020-08-21 20:34:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829640996] [2020-08-21 20:34:12,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896882002] [2020-08-21 20:34:12,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,120 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 20:34:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,147 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 20:34:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 20:34:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,150 INFO L225 Difference]: With dead ends: 201 [2020-08-21 20:34:12,150 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 20:34:12,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 20:34:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 20:34:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 20:34:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 20:34:12,167 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 20:34:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,167 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 20:34:12,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 20:34:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:34:12,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:34:12,170 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 20:34:12,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093724198] [2020-08-21 20:34:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093724198] [2020-08-21 20:34:12,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850832792] [2020-08-21 20:34:12,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,229 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 20:34:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,249 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 20:34:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 20:34:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,252 INFO L225 Difference]: With dead ends: 252 [2020-08-21 20:34:12,252 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 20:34:12,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 20:34:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 20:34:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 20:34:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 20:34:12,269 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 20:34:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,270 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 20:34:12,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,270 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 20:34:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:34:12,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:34:12,273 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 20:34:12,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716366313] [2020-08-21 20:34:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716366313] [2020-08-21 20:34:12,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886561535] [2020-08-21 20:34:12,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,331 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 20:34:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,367 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 20:34:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 20:34:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,370 INFO L225 Difference]: With dead ends: 432 [2020-08-21 20:34:12,370 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 20:34:12,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 20:34:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 20:34:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 20:34:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 20:34:12,414 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 20:34:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,414 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 20:34:12,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 20:34:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:34:12,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:34:12,420 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 20:34:12,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722889396] [2020-08-21 20:34:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722889396] [2020-08-21 20:34:12,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405596227] [2020-08-21 20:34:12,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,450 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 20:34:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,469 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 20:34:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:34:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,471 INFO L225 Difference]: With dead ends: 384 [2020-08-21 20:34:12,472 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 20:34:12,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 20:34:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 20:34:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 20:34:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 20:34:12,485 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 20:34:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,485 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 20:34:12,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 20:34:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:34:12,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:34:12,487 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 20:34:12,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152874160] [2020-08-21 20:34:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152874160] [2020-08-21 20:34:12,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754488346] [2020-08-21 20:34:12,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,520 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 20:34:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,547 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 20:34:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:34:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,550 INFO L225 Difference]: With dead ends: 476 [2020-08-21 20:34:12,551 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 20:34:12,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 20:34:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 20:34:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 20:34:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 20:34:12,565 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 20:34:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,566 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 20:34:12,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 20:34:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:34:12,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:34:12,568 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 20:34:12,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290773791] [2020-08-21 20:34:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290773791] [2020-08-21 20:34:12,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108482048] [2020-08-21 20:34:12,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,608 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 20:34:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,632 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 20:34:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:34:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,635 INFO L225 Difference]: With dead ends: 844 [2020-08-21 20:34:12,635 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 20:34:12,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 20:34:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 20:34:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 20:34:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 20:34:12,654 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 20:34:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,654 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 20:34:12,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 20:34:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 20:34:12,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:34:12,656 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 20:34:12,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062786711] [2020-08-21 20:34:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062786711] [2020-08-21 20:34:12,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425259262] [2020-08-21 20:34:12,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,683 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 20:34:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,702 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 20:34:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 20:34:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,706 INFO L225 Difference]: With dead ends: 744 [2020-08-21 20:34:12,706 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 20:34:12,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 20:34:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 20:34:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 20:34:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 20:34:12,723 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 20:34:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,723 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 20:34:12,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 20:34:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 20:34:12,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:34:12,725 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 20:34:12,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773729349] [2020-08-21 20:34:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773729349] [2020-08-21 20:34:12,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230564358] [2020-08-21 20:34:12,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,754 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 20:34:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,776 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 20:34:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 20:34:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,781 INFO L225 Difference]: With dead ends: 908 [2020-08-21 20:34:12,782 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 20:34:12,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 20:34:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 20:34:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 20:34:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 20:34:12,805 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 20:34:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,805 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 20:34:12,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 20:34:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 20:34:12,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:34:12,808 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 20:34:12,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216545621] [2020-08-21 20:34:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216545621] [2020-08-21 20:34:12,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397264888] [2020-08-21 20:34:12,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,838 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 20:34:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,870 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 20:34:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 20:34:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,876 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 20:34:12,876 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 20:34:12,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 20:34:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 20:34:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 20:34:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 20:34:12,910 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 20:34:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,911 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 20:34:12,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 20:34:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 20:34:12,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:12,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 20:34:12,914 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 20:34:12,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323871257] [2020-08-21 20:34:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323871257] [2020-08-21 20:34:12,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:12,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969870712] [2020-08-21 20:34:12,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:12,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,944 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 20:34:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,972 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 20:34:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:12,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 20:34:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,977 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 20:34:12,978 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 20:34:12,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 20:34:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 20:34:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 20:34:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 20:34:13,018 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 20:34:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,019 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 20:34:13,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 20:34:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 20:34:13,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:13,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 20:34:13,021 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 20:34:13,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596305269] [2020-08-21 20:34:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:13,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596305269] [2020-08-21 20:34:13,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:13,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282787547] [2020-08-21 20:34:13,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:13,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:13,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,046 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 20:34:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,076 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 20:34:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:13,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 20:34:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,085 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 20:34:13,085 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 20:34:13,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 20:34:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 20:34:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 20:34:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 20:34:13,127 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 20:34:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,127 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 20:34:13,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 20:34:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 20:34:13,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:13,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 20:34:13,131 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 20:34:13,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863933252] [2020-08-21 20:34:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:13,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863933252] [2020-08-21 20:34:13,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:13,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703900724] [2020-08-21 20:34:13,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:13,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,154 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 20:34:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,202 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 20:34:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:13,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 20:34:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,215 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 20:34:13,215 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 20:34:13,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 20:34:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 20:34:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 20:34:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 20:34:13,291 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 20:34:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,292 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 20:34:13,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 20:34:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:34:13,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:13,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 20:34:13,297 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 20:34:13,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775529474] [2020-08-21 20:34:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:13,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775529474] [2020-08-21 20:34:13,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:13,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756635539] [2020-08-21 20:34:13,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:13,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,327 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 20:34:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,383 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 20:34:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:13,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 20:34:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,394 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 20:34:13,394 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 20:34:13,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 20:34:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 20:34:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 20:34:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 20:34:13,470 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 20:34:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,471 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 20:34:13,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 20:34:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:34:13,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:13,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 20:34:13,476 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 20:34:13,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295825937] [2020-08-21 20:34:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:13,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295825937] [2020-08-21 20:34:13,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:13,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647164] [2020-08-21 20:34:13,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:13,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,506 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 20:34:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,580 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 20:34:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:13,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 20:34:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,596 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 20:34:13,596 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 20:34:13,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 20:34:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 20:34:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 20:34:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 20:34:13,709 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 20:34:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,710 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 20:34:13,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 20:34:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:34:13,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:13,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 20:34:13,715 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 20:34:13,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258418240] [2020-08-21 20:34:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:13,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258418240] [2020-08-21 20:34:13,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:13,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617775500] [2020-08-21 20:34:13,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:13,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,748 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 20:34:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,825 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 20:34:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:13,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 20:34:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,844 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 20:34:13,844 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 20:34:13,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 20:34:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 20:34:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 20:34:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 20:34:13,961 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 20:34:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,961 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 20:34:13,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 20:34:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 20:34:13,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:13,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 20:34:13,969 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 20:34:13,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011261145] [2020-08-21 20:34:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:13,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011261145] [2020-08-21 20:34:13,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:13,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941384984] [2020-08-21 20:34:13,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:13,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:13,993 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 20:34:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:14,055 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 20:34:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:14,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 20:34:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:14,073 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 20:34:14,073 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 20:34:14,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 20:34:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 20:34:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 20:34:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 20:34:14,211 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 20:34:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:14,211 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 20:34:14,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 20:34:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 20:34:14,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:14,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:14,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 20:34:14,217 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 20:34:14,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:14,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269947860] [2020-08-21 20:34:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:14,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269947860] [2020-08-21 20:34:14,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:14,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:14,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140313409] [2020-08-21 20:34:14,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:14,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:14,239 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 20:34:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:14,334 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 20:34:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:14,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 20:34:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:14,362 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 20:34:14,363 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 20:34:14,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 20:34:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 20:34:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 20:34:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 20:34:14,563 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 20:34:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:14,563 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 20:34:14,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 20:34:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 20:34:14,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:14,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:14,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 20:34:14,574 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 20:34:14,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:14,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531107928] [2020-08-21 20:34:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:14,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531107928] [2020-08-21 20:34:14,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:14,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:14,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597469625] [2020-08-21 20:34:14,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:14,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:14,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:14,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:14,599 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 20:34:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:14,798 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 20:34:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:14,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 20:34:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:14,823 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 20:34:14,823 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 20:34:14,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 20:34:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 20:34:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 20:34:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 20:34:15,006 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 20:34:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:15,007 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 20:34:15,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 20:34:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 20:34:15,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:15,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:15,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 20:34:15,016 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 20:34:15,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:15,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812929169] [2020-08-21 20:34:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:15,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812929169] [2020-08-21 20:34:15,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:15,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:15,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786986561] [2020-08-21 20:34:15,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:15,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:15,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:15,039 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 20:34:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:15,186 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 20:34:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:15,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 20:34:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:15,209 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 20:34:15,209 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 20:34:15,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 20:34:15,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 20:34:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 20:34:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 20:34:15,481 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 20:34:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:15,482 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 20:34:15,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 20:34:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 20:34:15,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:15,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:15,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 20:34:15,498 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 20:34:15,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:15,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761219072] [2020-08-21 20:34:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:15,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761219072] [2020-08-21 20:34:15,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:15,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:15,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153467514] [2020-08-21 20:34:15,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:15,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:15,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:15,520 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 20:34:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:15,719 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 20:34:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:15,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 20:34:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:15,758 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 20:34:15,759 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 20:34:15,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 20:34:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 20:34:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 20:34:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 20:34:16,410 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 20:34:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:16,411 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 20:34:16,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 20:34:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 20:34:16,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:16,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:16,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 20:34:16,435 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 20:34:16,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823558306] [2020-08-21 20:34:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:16,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823558306] [2020-08-21 20:34:16,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:16,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:16,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276053020] [2020-08-21 20:34:16,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:16,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:16,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:16,466 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 20:34:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:16,682 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 20:34:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:16,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 20:34:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:16,710 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 20:34:16,710 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 20:34:16,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 20:34:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 20:34:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 20:34:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 20:34:17,476 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 20:34:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:17,477 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 20:34:17,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 20:34:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 20:34:17,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:17,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:17,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 20:34:17,495 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 20:34:17,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:17,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129192670] [2020-08-21 20:34:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:17,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129192670] [2020-08-21 20:34:17,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:17,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:17,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259743114] [2020-08-21 20:34:17,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:17,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:17,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:17,541 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 20:34:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:17,822 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 20:34:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:17,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 20:34:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:17,875 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 20:34:17,876 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 20:34:17,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 20:34:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 20:34:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 20:34:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 20:34:18,476 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 20:34:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:18,477 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 20:34:18,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 20:34:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 20:34:18,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:18,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:18,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 20:34:18,517 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 20:34:18,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:18,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694863178] [2020-08-21 20:34:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:18,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694863178] [2020-08-21 20:34:18,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:18,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:18,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236404401] [2020-08-21 20:34:18,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:18,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:18,550 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 20:34:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:18,884 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 20:34:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:18,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 20:34:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:18,885 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 20:34:18,885 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 20:34:18,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 20:34:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 20:34:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 20:34:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 20:34:18,964 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 20:34:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:18,964 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 20:34:18,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 20:34:18,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 20:34:18,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 20:34:18,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 20:34:19,010 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 20:34:19,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:34:19,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:34:19,011 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 20:34:19,012 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 20:34:19,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 20:34:19,012 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 20:34:19,012 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 20:34:19,013 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,013 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,013 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,015 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,015 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 20:34:19,015 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,015 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 20:34:19,015 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,016 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,016 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,016 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 20:34:19,016 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 20:34:19,016 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 20:34:19,017 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 20:34:19,017 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 20:34:19,017 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 20:34:19,017 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 20:34:19,017 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,018 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,018 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 20:34:19,018 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 20:34:19,018 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,018 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,019 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,019 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,019 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,019 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 20:34:19,019 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,019 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 20:34:19,020 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,020 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 20:34:19,020 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 20:34:19,020 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,020 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 20:34:19,021 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 20:34:19,021 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 20:34:19,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:34:19 BoogieIcfgContainer [2020-08-21 20:34:19,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:34:19,051 INFO L168 Benchmark]: Toolchain (without parser) took 8762.34 ms. Allocated memory was 138.9 MB in the beginning and 541.1 MB in the end (delta: 402.1 MB). Free memory was 101.4 MB in the beginning and 149.1 MB in the end (delta: -47.7 MB). Peak memory consumption was 354.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:19,055 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:34:19,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.24 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 90.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:19,061 INFO L168 Benchmark]: Boogie Preprocessor took 124.61 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 90.4 MB in the beginning and 177.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:19,061 INFO L168 Benchmark]: RCFGBuilder took 374.82 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 158.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:19,062 INFO L168 Benchmark]: TraceAbstraction took 7964.91 ms. Allocated memory was 200.3 MB in the beginning and 541.1 MB in the end (delta: 340.8 MB). Free memory was 157.6 MB in the beginning and 149.1 MB in the end (delta: 8.5 MB). Peak memory consumption was 349.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:19,067 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.24 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 90.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.61 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 90.4 MB in the beginning and 177.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.82 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 158.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7964.91 ms. Allocated memory was 200.3 MB in the beginning and 541.1 MB in the end (delta: 340.8 MB). Free memory was 157.6 MB in the beginning and 149.1 MB in the end (delta: 8.5 MB). Peak memory consumption was 349.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...