/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:00:38,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:00:38,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:00:39,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:00:39,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:00:39,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:00:39,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:00:39,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:00:39,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:00:39,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:00:39,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:00:39,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:00:39,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:00:39,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:00:39,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:00:39,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:00:39,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:00:39,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:00:39,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:00:39,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:00:39,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:00:39,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:00:39,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:00:39,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:00:39,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:00:39,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:00:39,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:00:39,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:00:39,087 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 [2020-08-19 06:00:39,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:00:39,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:00:39,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:00:39,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:00:39,129 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:00:39,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:00:39,130 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:00:39,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:00:39,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:00:39,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:00:39,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:00:39,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:00:39,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:00:39,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:00:39,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:00:39,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:00:39,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:00:39,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:00:39,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:00:39,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:00:39,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:00:39,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:00:39,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:00:39,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:00:39,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:00:39,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:00:39,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:00:39,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:00:39,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:00:39,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 06:00:39,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:00:39,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:00:39,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:00:39,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:00:39,529 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:00:39,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-19 06:00:39,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ef7ac303/98de852f03274f9eb93d6c28a3d15ca4/FLAG32f76334c [2020-08-19 06:00:40,081 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:00:40,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-19 06:00:40,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ef7ac303/98de852f03274f9eb93d6c28a3d15ca4/FLAG32f76334c [2020-08-19 06:00:40,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ef7ac303/98de852f03274f9eb93d6c28a3d15ca4 [2020-08-19 06:00:40,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:00:40,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:00:40,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:00:40,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:00:40,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:00:40,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112bbb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40, skipping insertion in model container [2020-08-19 06:00:40,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:00:40,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:00:40,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:00:40,664 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:00:40,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:00:40,702 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:00:40,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40 WrapperNode [2020-08-19 06:00:40,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:00:40,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:00:40,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:00:40,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:00:40,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (1/1) ... [2020-08-19 06:00:40,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:00:40,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:00:40,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:00:40,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:00:40,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (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 [2020-08-19 06:00:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:00:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:00:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:00:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:00:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:00:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:00:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:00:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:00:41,179 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:00:41,180 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:00:41,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:41 BoogieIcfgContainer [2020-08-19 06:00:41,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:00:41,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:00:41,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:00:41,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:00:41,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:00:40" (1/3) ... [2020-08-19 06:00:41,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcbb8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:41, skipping insertion in model container [2020-08-19 06:00:41,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:40" (2/3) ... [2020-08-19 06:00:41,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcbb8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:41, skipping insertion in model container [2020-08-19 06:00:41,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:41" (3/3) ... [2020-08-19 06:00:41,204 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-19 06:00:41,218 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:00:41,225 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:00:41,240 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:00:41,266 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:00:41,266 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:00:41,267 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:00:41,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:00:41,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:00:41,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:00:41,268 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:00:41,268 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:00:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-19 06:00:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:00:41,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:41,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:41,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-19 06:00:41,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:41,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464817698] [2020-08-19 06:00:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:41,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464817698] [2020-08-19 06:00:41,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:41,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:41,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471979414] [2020-08-19 06:00:41,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:41,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:41,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:41,573 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-19 06:00:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:41,648 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-19 06:00:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:41,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 06:00:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:41,662 INFO L225 Difference]: With dead ends: 69 [2020-08-19 06:00:41,662 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 06:00:41,666 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 [2020-08-19 06:00:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 06:00:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-19 06:00:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 06:00:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-19 06:00:41,707 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-19 06:00:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:41,707 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-19 06:00:41,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-19 06:00:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:00:41,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:41,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:41,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:00:41,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-19 06:00:41,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:41,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156643364] [2020-08-19 06:00:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:41,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156643364] [2020-08-19 06:00:41,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:41,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:41,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809296489] [2020-08-19 06:00:41,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:41,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:41,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:41,778 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-19 06:00:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:41,804 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-19 06:00:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:41,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 06:00:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:41,806 INFO L225 Difference]: With dead ends: 87 [2020-08-19 06:00:41,806 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 06:00:41,808 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 [2020-08-19 06:00:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 06:00:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-19 06:00:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 06:00:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-19 06:00:41,819 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-19 06:00:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:41,819 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-19 06:00:41,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-19 06:00:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:00:41,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:41,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:41,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:00:41,822 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-19 06:00:41,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:41,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614693312] [2020-08-19 06:00:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:41,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614693312] [2020-08-19 06:00:41,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:41,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:41,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109058955] [2020-08-19 06:00:41,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:41,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:41,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:41,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:41,875 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-19 06:00:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:41,912 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-19 06:00:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:41,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:00:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:41,914 INFO L225 Difference]: With dead ends: 81 [2020-08-19 06:00:41,914 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:00:41,915 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 [2020-08-19 06:00:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:00:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-19 06:00:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 06:00:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-19 06:00:41,928 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-19 06:00:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:41,929 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-19 06:00:41,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-19 06:00:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:00:41,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:41,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:41,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:00:41,931 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-19 06:00:41,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:41,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165234758] [2020-08-19 06:00:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:41,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165234758] [2020-08-19 06:00:41,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:41,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:41,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746958232] [2020-08-19 06:00:41,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:41,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:41,975 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-19 06:00:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,000 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-19 06:00:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:00:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,003 INFO L225 Difference]: With dead ends: 100 [2020-08-19 06:00:42,003 INFO L226 Difference]: Without dead ends: 98 [2020-08-19 06:00:42,004 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 [2020-08-19 06:00:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-19 06:00:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-19 06:00:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 06:00:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-19 06:00:42,018 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-19 06:00:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,019 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-19 06:00:42,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-19 06:00:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:00:42,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:00:42,024 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-19 06:00:42,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867280387] [2020-08-19 06:00:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867280387] [2020-08-19 06:00:42,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879654059] [2020-08-19 06:00:42,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,093 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-19 06:00:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,127 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-19 06:00:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:00:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,129 INFO L225 Difference]: With dead ends: 164 [2020-08-19 06:00:42,129 INFO L226 Difference]: Without dead ends: 100 [2020-08-19 06:00:42,130 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 [2020-08-19 06:00:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-19 06:00:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-19 06:00:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-19 06:00:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-19 06:00:42,141 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-19 06:00:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,142 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-19 06:00:42,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-19 06:00:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:42,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:00:42,144 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-19 06:00:42,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602544364] [2020-08-19 06:00:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602544364] [2020-08-19 06:00:42,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162477815] [2020-08-19 06:00:42,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,185 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-19 06:00:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,203 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-19 06:00:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:00:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,205 INFO L225 Difference]: With dead ends: 147 [2020-08-19 06:00:42,206 INFO L226 Difference]: Without dead ends: 102 [2020-08-19 06:00:42,207 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 [2020-08-19 06:00:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-19 06:00:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-19 06:00:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 06:00:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-19 06:00:42,217 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-19 06:00:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,217 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-19 06:00:42,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-19 06:00:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:00:42,223 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-19 06:00:42,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752928857] [2020-08-19 06:00:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752928857] [2020-08-19 06:00:42,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512622078] [2020-08-19 06:00:42,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,310 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-19 06:00:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,328 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-19 06:00:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:00:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,331 INFO L225 Difference]: With dead ends: 180 [2020-08-19 06:00:42,331 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 06:00:42,332 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 [2020-08-19 06:00:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 06:00:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-19 06:00:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 06:00:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-19 06:00:42,345 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-19 06:00:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,346 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-19 06:00:42,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-19 06:00:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:42,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:00:42,348 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-19 06:00:42,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753037333] [2020-08-19 06:00:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753037333] [2020-08-19 06:00:42,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630777269] [2020-08-19 06:00:42,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,377 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-19 06:00:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,398 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 06:00:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:00:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,400 INFO L225 Difference]: With dead ends: 312 [2020-08-19 06:00:42,401 INFO L226 Difference]: Without dead ends: 186 [2020-08-19 06:00:42,402 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 [2020-08-19 06:00:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-19 06:00:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-19 06:00:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 06:00:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-19 06:00:42,417 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-19 06:00:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,418 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-19 06:00:42,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-19 06:00:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:00:42,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,420 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] [2020-08-19 06:00:42,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:00:42,420 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-19 06:00:42,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512634049] [2020-08-19 06:00:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512634049] [2020-08-19 06:00:42,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847768353] [2020-08-19 06:00:42,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,458 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-19 06:00:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,482 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-19 06:00:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:00:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,484 INFO L225 Difference]: With dead ends: 276 [2020-08-19 06:00:42,484 INFO L226 Difference]: Without dead ends: 190 [2020-08-19 06:00:42,486 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 [2020-08-19 06:00:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-19 06:00:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-19 06:00:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 06:00:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-19 06:00:42,499 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-19 06:00:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,499 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-19 06:00:42,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-19 06:00:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:00:42,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,501 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] [2020-08-19 06:00:42,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:00:42,502 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-19 06:00:42,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764222010] [2020-08-19 06:00:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764222010] [2020-08-19 06:00:42,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066908863] [2020-08-19 06:00:42,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,531 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-19 06:00:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,552 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-19 06:00:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:00:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,555 INFO L225 Difference]: With dead ends: 332 [2020-08-19 06:00:42,555 INFO L226 Difference]: Without dead ends: 330 [2020-08-19 06:00:42,556 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 [2020-08-19 06:00:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-19 06:00:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-19 06:00:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-19 06:00:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-19 06:00:42,569 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-19 06:00:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,569 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-19 06:00:42,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-19 06:00:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:00:42,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,572 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] [2020-08-19 06:00:42,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:00:42,573 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-19 06:00:42,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442055929] [2020-08-19 06:00:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442055929] [2020-08-19 06:00:42,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747200748] [2020-08-19 06:00:42,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,617 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-19 06:00:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,669 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-19 06:00:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:00:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,672 INFO L225 Difference]: With dead ends: 604 [2020-08-19 06:00:42,673 INFO L226 Difference]: Without dead ends: 354 [2020-08-19 06:00:42,674 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 [2020-08-19 06:00:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-19 06:00:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-19 06:00:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-19 06:00:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-19 06:00:42,689 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-19 06:00:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,689 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-19 06:00:42,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-19 06:00:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:00:42,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,692 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] [2020-08-19 06:00:42,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:00:42,692 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-19 06:00:42,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612239717] [2020-08-19 06:00:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612239717] [2020-08-19 06:00:42,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081949103] [2020-08-19 06:00:42,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,718 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-19 06:00:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,738 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-19 06:00:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:00:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,741 INFO L225 Difference]: With dead ends: 528 [2020-08-19 06:00:42,742 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 06:00:42,743 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 [2020-08-19 06:00:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 06:00:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-19 06:00:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 06:00:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-19 06:00:42,756 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-19 06:00:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,756 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-19 06:00:42,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-19 06:00:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:00:42,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,758 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] [2020-08-19 06:00:42,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:00:42,758 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-19 06:00:42,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975530610] [2020-08-19 06:00:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975530610] [2020-08-19 06:00:42,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3386899] [2020-08-19 06:00:42,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,788 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-19 06:00:42,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,817 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-19 06:00:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:00:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,821 INFO L225 Difference]: With dead ends: 620 [2020-08-19 06:00:42,821 INFO L226 Difference]: Without dead ends: 618 [2020-08-19 06:00:42,822 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 [2020-08-19 06:00:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-19 06:00:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-19 06:00:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-19 06:00:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-19 06:00:42,841 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-19 06:00:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,842 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-19 06:00:42,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-19 06:00:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:00:42,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,844 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] [2020-08-19 06:00:42,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:00:42,844 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-19 06:00:42,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515381878] [2020-08-19 06:00:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515381878] [2020-08-19 06:00:42,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862893715] [2020-08-19 06:00:42,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,867 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-19 06:00:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,901 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-19 06:00:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:00:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,906 INFO L225 Difference]: With dead ends: 1180 [2020-08-19 06:00:42,906 INFO L226 Difference]: Without dead ends: 682 [2020-08-19 06:00:42,908 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 [2020-08-19 06:00:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-19 06:00:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-19 06:00:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-19 06:00:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-19 06:00:42,934 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-19 06:00:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,934 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-19 06:00:42,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-19 06:00:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:00:42,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,936 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] [2020-08-19 06:00:42,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:00:42,937 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-19 06:00:42,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393637032] [2020-08-19 06:00:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393637032] [2020-08-19 06:00:42,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706937528] [2020-08-19 06:00:42,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,963 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-19 06:00:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,990 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-19 06:00:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:00:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,995 INFO L225 Difference]: With dead ends: 1020 [2020-08-19 06:00:42,995 INFO L226 Difference]: Without dead ends: 698 [2020-08-19 06:00:42,997 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 [2020-08-19 06:00:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-19 06:00:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-19 06:00:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-19 06:00:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-19 06:00:43,022 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-19 06:00:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,023 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-19 06:00:43,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-19 06:00:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:00:43,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,025 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] [2020-08-19 06:00:43,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:00:43,025 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-19 06:00:43,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698970433] [2020-08-19 06:00:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698970433] [2020-08-19 06:00:43,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565308668] [2020-08-19 06:00:43,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,070 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-19 06:00:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,106 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-19 06:00:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:00:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,112 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 06:00:43,112 INFO L226 Difference]: Without dead ends: 1162 [2020-08-19 06:00:43,113 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 [2020-08-19 06:00:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-19 06:00:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-19 06:00:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-19 06:00:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-19 06:00:43,152 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-19 06:00:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,153 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-19 06:00:43,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-19 06:00:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:00:43,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,155 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] [2020-08-19 06:00:43,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:00:43,156 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-19 06:00:43,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309387890] [2020-08-19 06:00:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309387890] [2020-08-19 06:00:43,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491293964] [2020-08-19 06:00:43,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,184 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-19 06:00:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,223 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-19 06:00:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:00:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,230 INFO L225 Difference]: With dead ends: 2316 [2020-08-19 06:00:43,230 INFO L226 Difference]: Without dead ends: 1322 [2020-08-19 06:00:43,233 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 [2020-08-19 06:00:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-19 06:00:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-19 06:00:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-19 06:00:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-19 06:00:43,276 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-19 06:00:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,276 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-19 06:00:43,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-19 06:00:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:00:43,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,280 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] [2020-08-19 06:00:43,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:00:43,281 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,281 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-19 06:00:43,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238042558] [2020-08-19 06:00:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238042558] [2020-08-19 06:00:43,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654568527] [2020-08-19 06:00:43,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,315 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-19 06:00:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,356 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-19 06:00:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:00:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,366 INFO L225 Difference]: With dead ends: 1980 [2020-08-19 06:00:43,366 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 06:00:43,369 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 [2020-08-19 06:00:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 06:00:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-19 06:00:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-19 06:00:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-19 06:00:43,427 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-19 06:00:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,429 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-19 06:00:43,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-19 06:00:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:00:43,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,433 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] [2020-08-19 06:00:43,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:00:43,434 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-19 06:00:43,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768711397] [2020-08-19 06:00:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768711397] [2020-08-19 06:00:43,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012247429] [2020-08-19 06:00:43,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,469 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-19 06:00:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,535 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-19 06:00:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:00:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,549 INFO L225 Difference]: With dead ends: 2186 [2020-08-19 06:00:43,550 INFO L226 Difference]: Without dead ends: 2184 [2020-08-19 06:00:43,551 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 [2020-08-19 06:00:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-19 06:00:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-19 06:00:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-19 06:00:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-19 06:00:43,666 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-19 06:00:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,666 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-19 06:00:43,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-19 06:00:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:00:43,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,670 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] [2020-08-19 06:00:43,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:00:43,671 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-19 06:00:43,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148334299] [2020-08-19 06:00:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148334299] [2020-08-19 06:00:43,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287413946] [2020-08-19 06:00:43,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,703 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-19 06:00:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,790 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-19 06:00:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:00:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,792 INFO L225 Difference]: With dead ends: 4552 [2020-08-19 06:00:43,792 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:00:43,801 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 [2020-08-19 06:00:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:00:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:00:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:00:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:00:43,802 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-19 06:00:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,802 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:00:43,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:00:43,803 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:00:43,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:00:43,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:00:43,833 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:00:43,833 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:00:43,834 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:00:43,834 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:00:43,834 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:00:43,834 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:00:43,834 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-19 06:00:43,834 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-19 06:00:43,834 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,834 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-19 06:00:43,835 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-19 06:00:43,835 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-19 06:00:43,835 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-19 06:00:43,835 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-19 06:00:43,835 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,835 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-19 06:00:43,835 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-19 06:00:43,836 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-19 06:00:43,838 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-19 06:00:43,838 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,838 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,838 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,838 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-19 06:00:43,839 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,839 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-19 06:00:43,839 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-19 06:00:43,839 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,839 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 06:00:43,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:00:43 BoogieIcfgContainer [2020-08-19 06:00:43,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:00:43,864 INFO L168 Benchmark]: Toolchain (without parser) took 3414.00 ms. Allocated memory was 143.1 MB in the beginning and 244.8 MB in the end (delta: 101.7 MB). Free memory was 106.2 MB in the beginning and 182.2 MB in the end (delta: -76.0 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:43,870 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 06:00:43,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.65 ms. Allocated memory is still 143.1 MB. Free memory was 106.0 MB in the beginning and 95.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:43,875 INFO L168 Benchmark]: Boogie Preprocessor took 129.62 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 95.7 MB in the beginning and 182.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:43,876 INFO L168 Benchmark]: RCFGBuilder took 359.97 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 166.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:43,877 INFO L168 Benchmark]: TraceAbstraction took 2663.08 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 165.4 MB in the beginning and 182.2 MB in the end (delta: -16.8 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:43,881 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.65 ms. Allocated memory is still 143.1 MB. Free memory was 106.0 MB in the beginning and 95.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.62 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 95.7 MB in the beginning and 182.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 359.97 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 166.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2663.08 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 165.4 MB in the beginning and 182.2 MB in the end (delta: -16.8 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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: 30]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 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, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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...