/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=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:49:04,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:49:04,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:49:04,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:49:04,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:49:04,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:49:04,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:49:04,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:49:04,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:49:04,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:49:04,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:49:04,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:49:04,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:49:04,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:49:04,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:49:04,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:49:04,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:49:04,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:49:04,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:49:04,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:49:04,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:49:04,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:49:04,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:49:04,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:49:04,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:49:04,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:49:04,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:49:04,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:49:04,138 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 06:49:04,179 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:49:04,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:49:04,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:49:04,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:49:04,181 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:49:04,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:49:04,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:49:04,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:49:04,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:49:04,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:49:04,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:49:04,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:49:04,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:49:04,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:49:04,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:49:04,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:49:04,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:49:04,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:49:04,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:49:04,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:49:04,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:49:04,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:04,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:49:04,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:49:04,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:49:04,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:49:04,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:49:04,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:49:04,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:49:04,188 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=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:49:04,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:49:04,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:49:04,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:49:04,505 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:49:04,506 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:49:04,506 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 06:49:04,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3405089e6/b447129b891c46d98c66fba2be558aab/FLAG0c9c5c2fc [2020-08-19 06:49:05,085 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:49:05,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 06:49:05,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3405089e6/b447129b891c46d98c66fba2be558aab/FLAG0c9c5c2fc [2020-08-19 06:49:05,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3405089e6/b447129b891c46d98c66fba2be558aab [2020-08-19 06:49:05,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:49:05,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:49:05,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:05,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:49:05,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:49:05,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05, skipping insertion in model container [2020-08-19 06:49:05,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:49:05,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:49:05,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:05,663 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:49:05,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:05,707 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:49:05,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05 WrapperNode [2020-08-19 06:49:05,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:05,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:49:05,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:49:05,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:49:05,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (1/1) ... [2020-08-19 06:49:05,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:49:05,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:49:05,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:49:05,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:49:05,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (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 06:49:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:49:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:49:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:49:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:49:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:49:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:49:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:49:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:49:06,213 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:49:06,213 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:49:06,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:06 BoogieIcfgContainer [2020-08-19 06:49:06,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:49:06,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:49:06,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:49:06,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:49:06,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:49:05" (1/3) ... [2020-08-19 06:49:06,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ccfc30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:06, skipping insertion in model container [2020-08-19 06:49:06,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:05" (2/3) ... [2020-08-19 06:49:06,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ccfc30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:06, skipping insertion in model container [2020-08-19 06:49:06,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:06" (3/3) ... [2020-08-19 06:49:06,228 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-19 06:49:06,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:49:06,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:49:06,272 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:49:06,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:49:06,318 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:49:06,318 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:49:06,318 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:49:06,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:49:06,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:49:06,319 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:49:06,319 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:49:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-19 06:49:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:49:06,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:06,352 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 06:49:06,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-19 06:49:06,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:06,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878741464] [2020-08-19 06:49:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:06,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878741464] [2020-08-19 06:49:06,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:06,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:06,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146117293] [2020-08-19 06:49:06,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:06,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:06,599 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-19 06:49:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:06,665 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-19 06:49:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:06,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:49:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:06,678 INFO L225 Difference]: With dead ends: 87 [2020-08-19 06:49:06,679 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 06:49:06,682 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 06:49:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 06:49:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-19 06:49:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 06:49:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-19 06:49:06,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-19 06:49:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:06,730 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-19 06:49:06,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-19 06:49:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:49:06,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:06,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:06,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:49:06,733 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-19 06:49:06,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:06,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943948570] [2020-08-19 06:49:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,808 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 06:49:06,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943948570] [2020-08-19 06:49:06,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:06,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:06,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406115593] [2020-08-19 06:49:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:06,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:06,812 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-19 06:49:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:06,839 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-19 06:49:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:06,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:49:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:06,842 INFO L225 Difference]: With dead ends: 117 [2020-08-19 06:49:06,843 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 06:49:06,844 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 06:49:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 06:49:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-19 06:49:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 06:49:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-19 06:49:06,857 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-19 06:49:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:06,858 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-19 06:49:06,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-19 06:49:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:06,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:06,860 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 06:49:06,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:49:06,860 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-19 06:49:06,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:06,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743732071] [2020-08-19 06:49:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,950 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 06:49:06,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743732071] [2020-08-19 06:49:06,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:06,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:06,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719630306] [2020-08-19 06:49:06,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:06,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:06,953 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-19 06:49:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:06,981 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-19 06:49:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:06,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:06,984 INFO L225 Difference]: With dead ends: 108 [2020-08-19 06:49:06,984 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 06:49:06,985 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 06:49:06,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 06:49:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-19 06:49:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 06:49:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-19 06:49:06,998 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-19 06:49:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:06,998 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-19 06:49:06,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-19 06:49:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:07,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,004 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 06:49:07,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:49:07,004 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-19 06:49:07,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437810577] [2020-08-19 06:49:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,054 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 06:49:07,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437810577] [2020-08-19 06:49:07,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968742716] [2020-08-19 06:49:07,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,057 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-19 06:49:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,081 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-19 06:49:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,084 INFO L225 Difference]: With dead ends: 136 [2020-08-19 06:49:07,084 INFO L226 Difference]: Without dead ends: 134 [2020-08-19 06:49:07,085 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 06:49:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-19 06:49:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-19 06:49:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 06:49:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-19 06:49:07,104 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-19 06:49:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,104 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-19 06:49:07,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-19 06:49:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:07,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,106 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 06:49:07,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:49:07,107 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-19 06:49:07,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751317541] [2020-08-19 06:49:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,166 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 06:49:07,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751317541] [2020-08-19 06:49:07,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172026430] [2020-08-19 06:49:07,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,169 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-19 06:49:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,198 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-19 06:49:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,201 INFO L225 Difference]: With dead ends: 224 [2020-08-19 06:49:07,201 INFO L226 Difference]: Without dead ends: 136 [2020-08-19 06:49:07,202 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 06:49:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-19 06:49:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-19 06:49:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-19 06:49:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-19 06:49:07,217 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-19 06:49:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,218 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-19 06:49:07,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-19 06:49:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:07,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,220 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 06:49:07,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:49:07,220 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-19 06:49:07,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842248592] [2020-08-19 06:49:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,262 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 06:49:07,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842248592] [2020-08-19 06:49:07,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385963474] [2020-08-19 06:49:07,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,267 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-19 06:49:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,289 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-19 06:49:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,291 INFO L225 Difference]: With dead ends: 201 [2020-08-19 06:49:07,292 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 06:49:07,293 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 06:49:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 06:49:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 06:49:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 06:49:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-19 06:49:07,318 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-19 06:49:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,318 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-19 06:49:07,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-19 06:49:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:07,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,320 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 06:49:07,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:49:07,320 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-19 06:49:07,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748132946] [2020-08-19 06:49:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,354 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 06:49:07,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748132946] [2020-08-19 06:49:07,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216242762] [2020-08-19 06:49:07,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,357 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-19 06:49:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,376 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-19 06:49:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,379 INFO L225 Difference]: With dead ends: 252 [2020-08-19 06:49:07,379 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 06:49:07,380 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 06:49:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 06:49:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-19 06:49:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 06:49:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-19 06:49:07,397 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-19 06:49:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,398 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-19 06:49:07,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-19 06:49:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:07,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,400 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 06:49:07,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:49:07,401 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-19 06:49:07,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250398323] [2020-08-19 06:49:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,444 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 06:49:07,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250398323] [2020-08-19 06:49:07,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788078619] [2020-08-19 06:49:07,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,447 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-19 06:49:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,472 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-19 06:49:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,474 INFO L225 Difference]: With dead ends: 432 [2020-08-19 06:49:07,475 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 06:49:07,476 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 06:49:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 06:49:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 06:49:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 06:49:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-19 06:49:07,494 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-19 06:49:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,494 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-19 06:49:07,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-19 06:49:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:07,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,497 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 06:49:07,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:49:07,497 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-19 06:49:07,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86379375] [2020-08-19 06:49:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,525 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 06:49:07,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86379375] [2020-08-19 06:49:07,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499680832] [2020-08-19 06:49:07,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,528 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-19 06:49:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,547 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-19 06:49:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,550 INFO L225 Difference]: With dead ends: 384 [2020-08-19 06:49:07,550 INFO L226 Difference]: Without dead ends: 262 [2020-08-19 06:49:07,551 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 06:49:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-19 06:49:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-19 06:49:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-19 06:49:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-19 06:49:07,566 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-19 06:49:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,566 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-19 06:49:07,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-19 06:49:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:07,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,569 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 06:49:07,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:49:07,569 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-19 06:49:07,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490154982] [2020-08-19 06:49:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,594 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 06:49:07,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490154982] [2020-08-19 06:49:07,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751248155] [2020-08-19 06:49:07,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,597 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-19 06:49:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,618 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-19 06:49:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,622 INFO L225 Difference]: With dead ends: 476 [2020-08-19 06:49:07,622 INFO L226 Difference]: Without dead ends: 474 [2020-08-19 06:49:07,623 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 06:49:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-19 06:49:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-19 06:49:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 06:49:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-19 06:49:07,639 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-19 06:49:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,639 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-19 06:49:07,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-19 06:49:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:07,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,642 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 06:49:07,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:49:07,643 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-19 06:49:07,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167835727] [2020-08-19 06:49:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,667 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 06:49:07,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167835727] [2020-08-19 06:49:07,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466173670] [2020-08-19 06:49:07,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,670 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-19 06:49:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,725 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-19 06:49:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,730 INFO L225 Difference]: With dead ends: 844 [2020-08-19 06:49:07,730 INFO L226 Difference]: Without dead ends: 498 [2020-08-19 06:49:07,733 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 06:49:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-19 06:49:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-19 06:49:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-19 06:49:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-19 06:49:07,762 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-19 06:49:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,763 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-19 06:49:07,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-19 06:49:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:07,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:07,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:49:07,768 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-19 06:49:07,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330374042] [2020-08-19 06:49:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,817 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 06:49:07,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330374042] [2020-08-19 06:49:07,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775578846] [2020-08-19 06:49:07,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,824 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-19 06:49:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,853 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-19 06:49:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,857 INFO L225 Difference]: With dead ends: 744 [2020-08-19 06:49:07,858 INFO L226 Difference]: Without dead ends: 506 [2020-08-19 06:49:07,859 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 06:49:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-19 06:49:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-19 06:49:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-19 06:49:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-19 06:49:07,879 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-19 06:49:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,880 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-19 06:49:07,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-19 06:49:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:07,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:07,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:49:07,890 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-19 06:49:07,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674167180] [2020-08-19 06:49:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,944 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 06:49:07,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674167180] [2020-08-19 06:49:07,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974638663] [2020-08-19 06:49:07,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,953 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-19 06:49:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,983 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-19 06:49:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,991 INFO L225 Difference]: With dead ends: 908 [2020-08-19 06:49:07,991 INFO L226 Difference]: Without dead ends: 906 [2020-08-19 06:49:07,992 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 06:49:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-19 06:49:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-19 06:49:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-19 06:49:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-19 06:49:08,020 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-19 06:49:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,022 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-19 06:49:08,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-19 06:49:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:08,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:08,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:49:08,025 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-19 06:49:08,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229550663] [2020-08-19 06:49:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,067 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 06:49:08,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229550663] [2020-08-19 06:49:08,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192108359] [2020-08-19 06:49:08,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,071 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-19 06:49:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,107 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-19 06:49:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,114 INFO L225 Difference]: With dead ends: 1660 [2020-08-19 06:49:08,114 INFO L226 Difference]: Without dead ends: 970 [2020-08-19 06:49:08,117 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 06:49:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-19 06:49:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-19 06:49:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-19 06:49:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-19 06:49:08,151 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-19 06:49:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,151 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-19 06:49:08,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-19 06:49:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:08,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:08,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:49:08,154 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-19 06:49:08,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254602626] [2020-08-19 06:49:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,195 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 06:49:08,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254602626] [2020-08-19 06:49:08,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192282401] [2020-08-19 06:49:08,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,197 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-19 06:49:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,228 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-19 06:49:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,234 INFO L225 Difference]: With dead ends: 1452 [2020-08-19 06:49:08,234 INFO L226 Difference]: Without dead ends: 986 [2020-08-19 06:49:08,236 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 06:49:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-19 06:49:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-19 06:49:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-19 06:49:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-19 06:49:08,265 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-19 06:49:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,266 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-19 06:49:08,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-19 06:49:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:08,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:08,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:49:08,269 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-19 06:49:08,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050932804] [2020-08-19 06:49:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,295 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 06:49:08,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050932804] [2020-08-19 06:49:08,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124863508] [2020-08-19 06:49:08,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,297 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-19 06:49:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,336 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-19 06:49:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,348 INFO L225 Difference]: With dead ends: 1740 [2020-08-19 06:49:08,349 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 06:49:08,350 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 06:49:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 06:49:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-19 06:49:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-19 06:49:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-19 06:49:08,400 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-19 06:49:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,401 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-19 06:49:08,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-19 06:49:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:08,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:08,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:49:08,405 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-19 06:49:08,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553873870] [2020-08-19 06:49:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,428 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 06:49:08,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553873870] [2020-08-19 06:49:08,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245881205] [2020-08-19 06:49:08,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,430 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-19 06:49:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,480 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-19 06:49:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,491 INFO L225 Difference]: With dead ends: 3276 [2020-08-19 06:49:08,492 INFO L226 Difference]: Without dead ends: 1898 [2020-08-19 06:49:08,495 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 06:49:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-19 06:49:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-19 06:49:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-19 06:49:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-19 06:49:08,555 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-19 06:49:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,555 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-19 06:49:08,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-19 06:49:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:49:08,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:08,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:49:08,558 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-19 06:49:08,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086176363] [2020-08-19 06:49:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,586 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 06:49:08,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086176363] [2020-08-19 06:49:08,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561412236] [2020-08-19 06:49:08,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,591 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-19 06:49:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,634 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-19 06:49:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 06:49:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,644 INFO L225 Difference]: With dead ends: 2844 [2020-08-19 06:49:08,645 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 06:49:08,647 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 06:49:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 06:49:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-19 06:49:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-19 06:49:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-19 06:49:08,759 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-19 06:49:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,760 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-19 06:49:08,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-19 06:49:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:49:08,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:08,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:49:08,765 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-19 06:49:08,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74840950] [2020-08-19 06:49:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,797 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 06:49:08,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74840950] [2020-08-19 06:49:08,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20222933] [2020-08-19 06:49:08,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,803 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-19 06:49:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,882 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-19 06:49:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 06:49:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,903 INFO L225 Difference]: With dead ends: 3340 [2020-08-19 06:49:08,903 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 06:49:08,905 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 06:49:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 06:49:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-19 06:49:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-19 06:49:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-19 06:49:09,019 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-19 06:49:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,020 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-19 06:49:09,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-19 06:49:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:49:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:09,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:49:09,029 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-19 06:49:09,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021276569] [2020-08-19 06:49:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,054 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 06:49:09,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021276569] [2020-08-19 06:49:09,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607814557] [2020-08-19 06:49:09,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,057 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-19 06:49:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,135 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-19 06:49:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 06:49:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,153 INFO L225 Difference]: With dead ends: 6476 [2020-08-19 06:49:09,154 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 06:49:09,159 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 06:49:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 06:49:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-19 06:49:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-19 06:49:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-19 06:49:09,270 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-19 06:49:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,308 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-19 06:49:09,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-19 06:49:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:49:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:09,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:49:09,313 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-19 06:49:09,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312935523] [2020-08-19 06:49:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,342 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 06:49:09,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312935523] [2020-08-19 06:49:09,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237545011] [2020-08-19 06:49:09,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,344 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-19 06:49:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,412 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-19 06:49:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 06:49:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,431 INFO L225 Difference]: With dead ends: 5580 [2020-08-19 06:49:09,432 INFO L226 Difference]: Without dead ends: 3786 [2020-08-19 06:49:09,436 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 06:49:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-19 06:49:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-19 06:49:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-19 06:49:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-19 06:49:09,537 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-19 06:49:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,537 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-19 06:49:09,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-19 06:49:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:49:09,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:09,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:49:09,543 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-19 06:49:09,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240774217] [2020-08-19 06:49:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,561 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 06:49:09,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240774217] [2020-08-19 06:49:09,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536881351] [2020-08-19 06:49:09,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,563 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-19 06:49:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,661 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-19 06:49:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 06:49:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,691 INFO L225 Difference]: With dead ends: 10956 [2020-08-19 06:49:09,692 INFO L226 Difference]: Without dead ends: 7306 [2020-08-19 06:49:09,699 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 06:49:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-19 06:49:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-19 06:49:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 06:49:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-19 06:49:09,938 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-19 06:49:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,938 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-19 06:49:09,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-19 06:49:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:49:09,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:09,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:49:09,946 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-19 06:49:09,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158623360] [2020-08-19 06:49:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,968 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 06:49:09,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158623360] [2020-08-19 06:49:09,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972419827] [2020-08-19 06:49:09,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,970 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-19 06:49:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,073 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-19 06:49:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 06:49:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,095 INFO L225 Difference]: With dead ends: 8076 [2020-08-19 06:49:10,096 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 06:49:10,101 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 06:49:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 06:49:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-19 06:49:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 06:49:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-19 06:49:10,282 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-19 06:49:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,282 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-19 06:49:10,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-19 06:49:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:49:10,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:10,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:49:10,299 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-19 06:49:10,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141729789] [2020-08-19 06:49:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,348 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 06:49:10,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141729789] [2020-08-19 06:49:10,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384244267] [2020-08-19 06:49:10,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,350 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-19 06:49:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,606 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-19 06:49:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 06:49:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,635 INFO L225 Difference]: With dead ends: 12172 [2020-08-19 06:49:10,636 INFO L226 Difference]: Without dead ends: 12170 [2020-08-19 06:49:10,639 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 06:49:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-19 06:49:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-19 06:49:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-19 06:49:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-19 06:49:10,890 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-19 06:49:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,891 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-19 06:49:10,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-19 06:49:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:49:10,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:10,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 06:49:10,908 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,908 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-19 06:49:10,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648335474] [2020-08-19 06:49:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,937 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 06:49:10,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648335474] [2020-08-19 06:49:10,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490784037] [2020-08-19 06:49:10,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,940 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-19 06:49:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,234 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-19 06:49:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 06:49:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,259 INFO L225 Difference]: With dead ends: 25228 [2020-08-19 06:49:11,259 INFO L226 Difference]: Without dead ends: 14218 [2020-08-19 06:49:11,278 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 06:49:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-19 06:49:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-19 06:49:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-19 06:49:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-19 06:49:11,631 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-19 06:49:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,632 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-19 06:49:11,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-19 06:49:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:49:11,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 06:49:11,648 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-19 06:49:11,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783503764] [2020-08-19 06:49:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,673 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 06:49:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783503764] [2020-08-19 06:49:11,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516143216] [2020-08-19 06:49:11,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,676 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-19 06:49:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,956 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-19 06:49:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 06:49:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,982 INFO L225 Difference]: With dead ends: 21516 [2020-08-19 06:49:11,982 INFO L226 Difference]: Without dead ends: 14602 [2020-08-19 06:49:11,999 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 06:49:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-19 06:49:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-19 06:49:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-19 06:49:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-19 06:49:12,305 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-19 06:49:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,305 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-19 06:49:12,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-19 06:49:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:49:12,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 06:49:12,321 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,322 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-19 06:49:12,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064394941] [2020-08-19 06:49:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,343 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 06:49:12,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064394941] [2020-08-19 06:49:12,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375775336] [2020-08-19 06:49:12,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,344 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-19 06:49:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:13,021 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-19 06:49:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:13,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 06:49:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:13,077 INFO L225 Difference]: With dead ends: 23562 [2020-08-19 06:49:13,077 INFO L226 Difference]: Without dead ends: 23560 [2020-08-19 06:49:13,083 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 06:49:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-19 06:49:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-19 06:49:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-19 06:49:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-19 06:49:13,460 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-19 06:49:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:13,461 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-19 06:49:13,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-19 06:49:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:49:13,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:13,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:13,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 06:49:13,490 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-19 06:49:13,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:13,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917442642] [2020-08-19 06:49:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:13,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:13,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917442642] [2020-08-19 06:49:13,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:13,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:13,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335427527] [2020-08-19 06:49:13,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:13,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:13,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:13,520 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-19 06:49:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:13,931 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-19 06:49:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:13,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 06:49:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:13,932 INFO L225 Difference]: With dead ends: 50184 [2020-08-19 06:49:13,932 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:49:14,020 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 06:49:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:49:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:49:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:49:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:49:14,021 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-19 06:49:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:14,022 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:49:14,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:49:14,022 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:49:14,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 06:49:14,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:49:14,061 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:49:14,062 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:14,062 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:14,062 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:49:14,063 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:49:14,063 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:49:14,063 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-19 06:49:14,064 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-19 06:49:14,064 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,064 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,064 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,066 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,066 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-19 06:49:14,066 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,067 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-19 06:49:14,067 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,067 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,067 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,067 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-19 06:49:14,067 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-19 06:49:14,068 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-19 06:49:14,068 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-19 06:49:14,068 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-19 06:49:14,068 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-19 06:49:14,069 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-19 06:49:14,069 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,069 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,069 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-19 06:49:14,069 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-19 06:49:14,069 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,070 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-19 06:49:14,071 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-19 06:49:14,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:49:14 BoogieIcfgContainer [2020-08-19 06:49:14,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:49:14,105 INFO L168 Benchmark]: Toolchain (without parser) took 8652.85 ms. Allocated memory was 148.9 MB in the beginning and 659.6 MB in the end (delta: 510.7 MB). Free memory was 104.5 MB in the beginning and 415.0 MB in the end (delta: -310.5 MB). Peak memory consumption was 200.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:14,108 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:49:14,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.15 ms. Allocated memory is still 148.9 MB. Free memory was 104.3 MB in the beginning and 93.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:14,113 INFO L168 Benchmark]: Boogie Preprocessor took 139.11 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 183.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:14,113 INFO L168 Benchmark]: RCFGBuilder took 370.10 ms. Allocated memory is still 205.0 MB. Free memory was 183.1 MB in the beginning and 163.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:14,114 INFO L168 Benchmark]: TraceAbstraction took 7882.43 ms. Allocated memory was 205.0 MB in the beginning and 659.6 MB in the end (delta: 454.6 MB). Free memory was 162.9 MB in the beginning and 415.0 MB in the end (delta: -252.1 MB). Peak memory consumption was 202.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:14,118 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.15 ms. Allocated memory is still 148.9 MB. Free memory was 104.3 MB in the beginning and 93.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.11 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 183.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 370.10 ms. Allocated memory is still 205.0 MB. Free memory was 183.1 MB in the beginning and 163.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7882.43 ms. Allocated memory was 205.0 MB in the beginning and 659.6 MB in the end (delta: 454.6 MB). Free memory was 162.9 MB in the beginning and 415.0 MB in the end (delta: -252.1 MB). Peak memory consumption was 202.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...