/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:40:04,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:40:04,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:40:04,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:40:04,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:40:04,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:40:04,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:40:04,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:40:04,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:40:04,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:40:04,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:40:04,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:40:04,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:40:04,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:40:04,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:40:04,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:40:04,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:40:04,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:40:04,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:40:04,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:40:04,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:40:04,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:40:04,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:40:04,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:40:04,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 04:40:04,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:40:04,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:40:04,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:40:04,401 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 [2020-08-22 04:40:04,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:40:04,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:40:04,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:40:04,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:40:04,447 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:40:04,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:40:04,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:40:04,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:40:04,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:40:04,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:40:04,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:40:04,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:40:04,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:40:04,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:40:04,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:40:04,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:40:04,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:40:04,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:40:04,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:40:04,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:40:04,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:40:04,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:40:04,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:40:04,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:40:04,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:40:04,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:40:04,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:40:04,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:40:04,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:40:04,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:40:04,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:40:04,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:40:04,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:40:04,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:40:04,789 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:40:04,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 04:40:04,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa83c804/b5969f0dee124d6084f092f9d70a7f62/FLAG8c5e9cd1b [2020-08-22 04:40:05,344 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:40:05,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 04:40:05,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa83c804/b5969f0dee124d6084f092f9d70a7f62/FLAG8c5e9cd1b [2020-08-22 04:40:05,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa83c804/b5969f0dee124d6084f092f9d70a7f62 [2020-08-22 04:40:05,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:40:05,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:40:05,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:40:05,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:40:05,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:40:05,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc3ae89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05, skipping insertion in model container [2020-08-22 04:40:05,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:40:05,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:40:05,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:40:05,996 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:40:06,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:40:06,037 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:40:06,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06 WrapperNode [2020-08-22 04:40:06,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:40:06,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:40:06,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:40:06,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:40:06,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (1/1) ... [2020-08-22 04:40:06,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:40:06,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:40:06,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:40:06,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:40:06,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (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 [2020-08-22 04:40:06,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:40:06,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:40:06,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:40:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:40:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:40:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:40:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:40:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:40:06,581 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:40:06,582 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 04:40:06,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:40:06 BoogieIcfgContainer [2020-08-22 04:40:06,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:40:06,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:40:06,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:40:06,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:40:06,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:40:05" (1/3) ... [2020-08-22 04:40:06,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a5a1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:40:06, skipping insertion in model container [2020-08-22 04:40:06,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:06" (2/3) ... [2020-08-22 04:40:06,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a5a1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:40:06, skipping insertion in model container [2020-08-22 04:40:06,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:40:06" (3/3) ... [2020-08-22 04:40:06,595 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-22 04:40:06,606 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:40:06,614 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:40:06,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:40:06,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:40:06,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:40:06,652 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:40:06,652 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:40:06,653 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:40:06,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:40:06,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:40:06,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:40:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-22 04:40:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:40:06,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:06,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:06,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-22 04:40:06,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:06,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259596954] [2020-08-22 04:40:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:06,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259596954] [2020-08-22 04:40:06,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:06,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:06,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99701590] [2020-08-22 04:40:06,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:06,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:06,912 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-22 04:40:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:06,987 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-22 04:40:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:06,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 04:40:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,001 INFO L225 Difference]: With dead ends: 81 [2020-08-22 04:40:07,002 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 04:40:07,005 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 [2020-08-22 04:40:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 04:40:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-22 04:40:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 04:40:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-22 04:40:07,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-22 04:40:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,054 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-22 04:40:07,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-22 04:40:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:40:07,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:40:07,057 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-22 04:40:07,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019288949] [2020-08-22 04:40:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019288949] [2020-08-22 04:40:07,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895458638] [2020-08-22 04:40:07,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,138 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-22 04:40:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,166 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-22 04:40:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 04:40:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,169 INFO L225 Difference]: With dead ends: 107 [2020-08-22 04:40:07,169 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 04:40:07,171 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 [2020-08-22 04:40:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 04:40:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-22 04:40:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 04:40:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-22 04:40:07,181 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-22 04:40:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,182 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-22 04:40:07,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-22 04:40:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:40:07,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,183 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] [2020-08-22 04:40:07,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:40:07,184 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-22 04:40:07,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050881617] [2020-08-22 04:40:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050881617] [2020-08-22 04:40:07,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894623447] [2020-08-22 04:40:07,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,255 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-22 04:40:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,281 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-22 04:40:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:40:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,283 INFO L225 Difference]: With dead ends: 99 [2020-08-22 04:40:07,283 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 04:40:07,284 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 [2020-08-22 04:40:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 04:40:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-22 04:40:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 04:40:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-22 04:40:07,294 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-22 04:40:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,295 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-22 04:40:07,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-22 04:40:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:40:07,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:40:07,297 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-22 04:40:07,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405620381] [2020-08-22 04:40:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405620381] [2020-08-22 04:40:07,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772898965] [2020-08-22 04:40:07,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,356 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-22 04:40:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,388 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-22 04:40:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:40:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,391 INFO L225 Difference]: With dead ends: 124 [2020-08-22 04:40:07,391 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 04:40:07,392 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 [2020-08-22 04:40:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 04:40:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-22 04:40:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 04:40:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-22 04:40:07,410 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-22 04:40:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,410 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-22 04:40:07,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-22 04:40:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:40:07,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,412 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] [2020-08-22 04:40:07,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:40:07,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-22 04:40:07,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407547971] [2020-08-22 04:40:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407547971] [2020-08-22 04:40:07,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088878243] [2020-08-22 04:40:07,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,452 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-22 04:40:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,474 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-22 04:40:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:40:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,476 INFO L225 Difference]: With dead ends: 204 [2020-08-22 04:40:07,477 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 04:40:07,478 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 [2020-08-22 04:40:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 04:40:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-22 04:40:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 04:40:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-22 04:40:07,490 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-22 04:40:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,491 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-22 04:40:07,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-22 04:40:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:40:07,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,492 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] [2020-08-22 04:40:07,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:40:07,493 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-22 04:40:07,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608145851] [2020-08-22 04:40:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608145851] [2020-08-22 04:40:07,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425942538] [2020-08-22 04:40:07,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,533 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-22 04:40:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,551 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-22 04:40:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:40:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,553 INFO L225 Difference]: With dead ends: 183 [2020-08-22 04:40:07,553 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 04:40:07,554 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 [2020-08-22 04:40:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 04:40:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-22 04:40:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 04:40:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-22 04:40:07,565 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-22 04:40:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,566 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-22 04:40:07,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-22 04:40:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:40:07,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,567 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] [2020-08-22 04:40:07,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:40:07,568 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-22 04:40:07,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112111897] [2020-08-22 04:40:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112111897] [2020-08-22 04:40:07,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658638109] [2020-08-22 04:40:07,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,617 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-22 04:40:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,686 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-22 04:40:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:40:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,689 INFO L225 Difference]: With dead ends: 228 [2020-08-22 04:40:07,690 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 04:40:07,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 04:40:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-22 04:40:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 04:40:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-22 04:40:07,715 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-22 04:40:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,721 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-22 04:40:07,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-22 04:40:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:40:07,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:40:07,726 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-22 04:40:07,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517547421] [2020-08-22 04:40:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517547421] [2020-08-22 04:40:07,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417240901] [2020-08-22 04:40:07,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,764 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-22 04:40:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,788 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-22 04:40:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:40:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,791 INFO L225 Difference]: With dead ends: 392 [2020-08-22 04:40:07,791 INFO L226 Difference]: Without dead ends: 234 [2020-08-22 04:40:07,793 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 [2020-08-22 04:40:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-22 04:40:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-22 04:40:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 04:40:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-22 04:40:07,805 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-22 04:40:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,806 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-22 04:40:07,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-22 04:40:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:40:07,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,808 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] [2020-08-22 04:40:07,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:40:07,808 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-22 04:40:07,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961370269] [2020-08-22 04:40:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961370269] [2020-08-22 04:40:07,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419744599] [2020-08-22 04:40:07,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,842 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-22 04:40:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,861 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-22 04:40:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:40:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,864 INFO L225 Difference]: With dead ends: 348 [2020-08-22 04:40:07,864 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 04:40:07,865 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 [2020-08-22 04:40:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 04:40:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-22 04:40:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 04:40:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-22 04:40:07,876 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-22 04:40:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,876 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-22 04:40:07,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-22 04:40:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:40:07,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,878 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] [2020-08-22 04:40:07,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:40:07,879 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,879 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-22 04:40:07,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486412673] [2020-08-22 04:40:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486412673] [2020-08-22 04:40:07,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482063879] [2020-08-22 04:40:07,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,919 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-22 04:40:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,943 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-22 04:40:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:40:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,947 INFO L225 Difference]: With dead ends: 428 [2020-08-22 04:40:07,949 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 04:40:07,950 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 [2020-08-22 04:40:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 04:40:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-22 04:40:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-22 04:40:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-22 04:40:07,963 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-22 04:40:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,964 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-22 04:40:07,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-22 04:40:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:40:07,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:40:07,967 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-22 04:40:07,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405372833] [2020-08-22 04:40:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405372833] [2020-08-22 04:40:07,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577992705] [2020-08-22 04:40:07,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,994 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-22 04:40:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,019 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-22 04:40:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:40:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,023 INFO L225 Difference]: With dead ends: 764 [2020-08-22 04:40:08,023 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 04:40:08,024 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 [2020-08-22 04:40:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 04:40:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-22 04:40:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-22 04:40:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-22 04:40:08,042 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-22 04:40:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,043 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-22 04:40:08,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-22 04:40:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:40:08,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,045 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] [2020-08-22 04:40:08,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:40:08,045 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-22 04:40:08,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927193033] [2020-08-22 04:40:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927193033] [2020-08-22 04:40:08,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849793540] [2020-08-22 04:40:08,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,073 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-22 04:40:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,094 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-22 04:40:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:40:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,097 INFO L225 Difference]: With dead ends: 672 [2020-08-22 04:40:08,098 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 04:40:08,099 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 [2020-08-22 04:40:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 04:40:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-22 04:40:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 04:40:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-22 04:40:08,115 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-22 04:40:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,115 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-22 04:40:08,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-22 04:40:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:40:08,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,117 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] [2020-08-22 04:40:08,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:40:08,117 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-22 04:40:08,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996366737] [2020-08-22 04:40:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996366737] [2020-08-22 04:40:08,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706405938] [2020-08-22 04:40:08,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,144 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-22 04:40:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,167 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-22 04:40:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:40:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,172 INFO L225 Difference]: With dead ends: 812 [2020-08-22 04:40:08,172 INFO L226 Difference]: Without dead ends: 810 [2020-08-22 04:40:08,173 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 [2020-08-22 04:40:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-22 04:40:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-22 04:40:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-22 04:40:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-22 04:40:08,194 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-22 04:40:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,195 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-22 04:40:08,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-22 04:40:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:40:08,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:08,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:40:08,197 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-22 04:40:08,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704109411] [2020-08-22 04:40:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704109411] [2020-08-22 04:40:08,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419092888] [2020-08-22 04:40:08,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,229 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-22 04:40:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,261 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-22 04:40:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:40:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,267 INFO L225 Difference]: With dead ends: 1500 [2020-08-22 04:40:08,267 INFO L226 Difference]: Without dead ends: 874 [2020-08-22 04:40:08,269 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 [2020-08-22 04:40:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-22 04:40:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-22 04:40:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-22 04:40:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-22 04:40:08,302 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-22 04:40:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,303 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-22 04:40:08,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-22 04:40:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:40:08,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,305 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] [2020-08-22 04:40:08,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:40:08,306 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-22 04:40:08,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611672225] [2020-08-22 04:40:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611672225] [2020-08-22 04:40:08,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582735066] [2020-08-22 04:40:08,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,334 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-22 04:40:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,365 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-22 04:40:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:40:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,370 INFO L225 Difference]: With dead ends: 1308 [2020-08-22 04:40:08,371 INFO L226 Difference]: Without dead ends: 890 [2020-08-22 04:40:08,372 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 [2020-08-22 04:40:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-22 04:40:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-22 04:40:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-22 04:40:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-22 04:40:08,418 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-22 04:40:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,419 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-22 04:40:08,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-22 04:40:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:40:08,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,421 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] [2020-08-22 04:40:08,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:40:08,421 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,422 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-22 04:40:08,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868681722] [2020-08-22 04:40:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868681722] [2020-08-22 04:40:08,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209766803] [2020-08-22 04:40:08,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,446 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-22 04:40:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,478 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-22 04:40:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:40:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,486 INFO L225 Difference]: With dead ends: 1548 [2020-08-22 04:40:08,486 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 04:40:08,487 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 [2020-08-22 04:40:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 04:40:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-22 04:40:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-22 04:40:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-22 04:40:08,526 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-22 04:40:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,526 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-22 04:40:08,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-22 04:40:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:40:08,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,530 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] [2020-08-22 04:40:08,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:40:08,530 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-22 04:40:08,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457415613] [2020-08-22 04:40:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457415613] [2020-08-22 04:40:08,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014030650] [2020-08-22 04:40:08,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,554 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-22 04:40:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,598 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-22 04:40:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:40:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,609 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 04:40:08,610 INFO L226 Difference]: Without dead ends: 1706 [2020-08-22 04:40:08,614 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 [2020-08-22 04:40:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-22 04:40:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-22 04:40:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-22 04:40:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-22 04:40:08,685 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-22 04:40:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,686 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-22 04:40:08,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-22 04:40:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:40:08,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,690 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] [2020-08-22 04:40:08,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:40:08,691 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-22 04:40:08,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340820351] [2020-08-22 04:40:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340820351] [2020-08-22 04:40:08,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899929192] [2020-08-22 04:40:08,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,717 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-22 04:40:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,769 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-22 04:40:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:40:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,780 INFO L225 Difference]: With dead ends: 2556 [2020-08-22 04:40:08,780 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 04:40:08,783 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 [2020-08-22 04:40:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 04:40:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-22 04:40:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-22 04:40:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-22 04:40:08,860 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-22 04:40:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,861 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-22 04:40:08,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-22 04:40:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:40:08,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,864 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] [2020-08-22 04:40:08,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:40:08,865 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-22 04:40:08,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117255144] [2020-08-22 04:40:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117255144] [2020-08-22 04:40:08,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211701478] [2020-08-22 04:40:08,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,892 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-22 04:40:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,953 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-22 04:40:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:40:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,970 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 04:40:08,971 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 04:40:08,972 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 [2020-08-22 04:40:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 04:40:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-22 04:40:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-22 04:40:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-22 04:40:09,076 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-22 04:40:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:09,076 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-22 04:40:09,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-22 04:40:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:40:09,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:09,081 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] [2020-08-22 04:40:09,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:40:09,081 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:09,081 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-22 04:40:09,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:09,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094925238] [2020-08-22 04:40:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:09,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094925238] [2020-08-22 04:40:09,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:09,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:09,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652616655] [2020-08-22 04:40:09,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:09,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:09,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:09,104 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-22 04:40:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:09,173 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-22 04:40:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:09,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:40:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:09,191 INFO L225 Difference]: With dead ends: 5836 [2020-08-22 04:40:09,191 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 04:40:09,196 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 [2020-08-22 04:40:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 04:40:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-22 04:40:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-22 04:40:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-22 04:40:09,301 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-22 04:40:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:09,301 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-22 04:40:09,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-22 04:40:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:40:09,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:09,306 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] [2020-08-22 04:40:09,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:40:09,307 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:09,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-22 04:40:09,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:09,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835033129] [2020-08-22 04:40:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:09,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835033129] [2020-08-22 04:40:09,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:09,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:09,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223881891] [2020-08-22 04:40:09,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:09,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:09,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:09,328 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-22 04:40:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:09,386 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-22 04:40:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:09,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 04:40:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:09,402 INFO L225 Difference]: With dead ends: 5004 [2020-08-22 04:40:09,402 INFO L226 Difference]: Without dead ends: 3402 [2020-08-22 04:40:09,406 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 [2020-08-22 04:40:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-22 04:40:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-22 04:40:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-22 04:40:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-22 04:40:09,530 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-22 04:40:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:09,530 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-22 04:40:09,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-22 04:40:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:40:09,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:09,535 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] [2020-08-22 04:40:09,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:40:09,536 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:09,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-22 04:40:09,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:09,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087950957] [2020-08-22 04:40:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:09,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087950957] [2020-08-22 04:40:09,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:09,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:09,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681270348] [2020-08-22 04:40:09,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:09,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:09,562 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-22 04:40:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:09,662 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-22 04:40:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:09,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 04:40:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:09,694 INFO L225 Difference]: With dead ends: 9804 [2020-08-22 04:40:09,694 INFO L226 Difference]: Without dead ends: 6538 [2020-08-22 04:40:09,703 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 [2020-08-22 04:40:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-22 04:40:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-22 04:40:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 04:40:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-22 04:40:09,941 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-22 04:40:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:09,942 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-22 04:40:09,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-22 04:40:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:40:09,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:09,955 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] [2020-08-22 04:40:09,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 04:40:09,955 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-22 04:40:09,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:09,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309569035] [2020-08-22 04:40:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:09,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309569035] [2020-08-22 04:40:09,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:09,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:09,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098415832] [2020-08-22 04:40:09,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:09,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:09,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:09,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:09,983 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-22 04:40:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:10,218 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-22 04:40:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:10,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 04:40:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:10,238 INFO L225 Difference]: With dead ends: 7052 [2020-08-22 04:40:10,238 INFO L226 Difference]: Without dead ends: 7050 [2020-08-22 04:40:10,241 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 [2020-08-22 04:40:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-22 04:40:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-22 04:40:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 04:40:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-22 04:40:10,512 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-22 04:40:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:10,512 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-22 04:40:10,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-22 04:40:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:40:10,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:10,525 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] [2020-08-22 04:40:10,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 04:40:10,526 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-22 04:40:10,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:10,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531779087] [2020-08-22 04:40:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:10,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:10,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531779087] [2020-08-22 04:40:10,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:10,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:10,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426240147] [2020-08-22 04:40:10,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:10,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:10,556 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-22 04:40:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:10,798 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-22 04:40:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:10,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 04:40:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:10,832 INFO L225 Difference]: With dead ends: 10634 [2020-08-22 04:40:10,832 INFO L226 Difference]: Without dead ends: 10632 [2020-08-22 04:40:10,837 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 [2020-08-22 04:40:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-22 04:40:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-22 04:40:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-22 04:40:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-22 04:40:11,141 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-22 04:40:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:11,142 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-22 04:40:11,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-22 04:40:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:40:11,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:11,159 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] [2020-08-22 04:40:11,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 04:40:11,159 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-22 04:40:11,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:11,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714880078] [2020-08-22 04:40:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:11,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:11,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714880078] [2020-08-22 04:40:11,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:11,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:11,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730978700] [2020-08-22 04:40:11,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:11,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:11,181 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-22 04:40:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:11,387 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-22 04:40:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:11,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 04:40:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:11,389 INFO L225 Difference]: With dead ends: 22664 [2020-08-22 04:40:11,389 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:40:11,431 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 [2020-08-22 04:40:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:40:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:40:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:40:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:40:11,432 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-22 04:40:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:11,433 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:40:11,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:40:11,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:40:11,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 04:40:11,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:40:11,462 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:40:11,462 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:40:11,462 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:40:11,462 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:40:11,462 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:40:11,462 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:40:11,462 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-22 04:40:11,463 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,464 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-22 04:40:11,465 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-22 04:40:11,465 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-22 04:40:11,465 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-22 04:40:11,465 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,465 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,465 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,465 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-22 04:40:11,465 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,466 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,466 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-22 04:40:11,466 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-22 04:40:11,466 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-22 04:40:11,466 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,466 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,466 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-22 04:40:11,467 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-22 04:40:11,467 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,467 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 04:40:11,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:40:11 BoogieIcfgContainer [2020-08-22 04:40:11,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:40:11,483 INFO L168 Benchmark]: Toolchain (without parser) took 5713.26 ms. Allocated memory was 140.5 MB in the beginning and 340.8 MB in the end (delta: 200.3 MB). Free memory was 103.8 MB in the beginning and 113.2 MB in the end (delta: -9.4 MB). Peak memory consumption was 190.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:11,484 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 04:40:11,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.08 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:11,485 INFO L168 Benchmark]: Boogie Preprocessor took 137.77 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.1 MB in the beginning and 180.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:11,486 INFO L168 Benchmark]: RCFGBuilder took 409.53 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 162.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:11,486 INFO L168 Benchmark]: TraceAbstraction took 4892.99 ms. Allocated memory was 202.9 MB in the beginning and 340.8 MB in the end (delta: 137.9 MB). Free memory was 161.4 MB in the beginning and 113.2 MB in the end (delta: 48.2 MB). Peak memory consumption was 186.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:11,489 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.08 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.77 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.1 MB in the beginning and 180.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.53 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 162.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4892.99 ms. Allocated memory was 202.9 MB in the beginning and 340.8 MB in the end (delta: 137.9 MB). Free memory was 161.4 MB in the beginning and 113.2 MB in the end (delta: 48.2 MB). Peak memory consumption was 186.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...