/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=BIGGEST --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_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:20:53,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:20:53,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:20:53,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:20:53,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:20:53,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:20:53,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:20:53,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:20:53,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:20:53,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:20:53,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:20:53,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:20:53,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:20:53,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:20:53,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:20:53,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:20:53,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:20:53,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:20:53,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:20:53,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:20:53,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:20:53,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:20:53,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:20:53,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:20:53,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:20:53,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:20:53,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:20:53,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:20:53,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:20:53,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:20:53,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:20:53,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:20:53,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:20:53,787 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:20:53,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:20:53,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:20:53,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:20:53,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:20:53,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:20:53,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:20:53,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:20:53,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:20:53,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:20:53,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:20:53,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:20:53,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:20:53,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:20:53,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:20:53,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:20:53,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:20:53,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:53,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:20:53,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:20:53,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:20:53,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:20:53,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:20:53,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:20:53,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:20:53,792 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:54,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:54,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:54,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:54,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:54,125 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:54,126 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-21 17:20:54,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79e8bfce7/5e5dd651ad4b42499812a5f5082dbf2d/FLAG395d0402a [2020-08-21 17:20:54,700 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:54,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-21 17:20:54,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79e8bfce7/5e5dd651ad4b42499812a5f5082dbf2d/FLAG395d0402a [2020-08-21 17:20:55,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79e8bfce7/5e5dd651ad4b42499812a5f5082dbf2d [2020-08-21 17:20:55,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:20:55,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:20:55,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:55,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:20:55,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:20:55,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488fa6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55, skipping insertion in model container [2020-08-21 17:20:55,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:20:55,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:20:55,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:55,364 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:20:55,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:55,397 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:20:55,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55 WrapperNode [2020-08-21 17:20:55,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:55,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:20:55,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:20:55,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:20:55,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... [2020-08-21 17:20:55,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:20:55,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:20:55,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:20:55,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:20:55,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:20:55,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:20:55,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:20:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:20:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:20:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:20:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:20:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:20:55,836 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:20:55,836 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:20:55,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:55 BoogieIcfgContainer [2020-08-21 17:20:55,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:20:55,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:20:55,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:20:55,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:20:55,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:55" (1/3) ... [2020-08-21 17:20:55,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e6e592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:55, skipping insertion in model container [2020-08-21 17:20:55,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:55" (2/3) ... [2020-08-21 17:20:55,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e6e592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:55, skipping insertion in model container [2020-08-21 17:20:55,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:55" (3/3) ... [2020-08-21 17:20:55,849 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-21 17:20:55,861 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:20:55,871 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:20:55,888 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:20:55,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:20:55,922 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:20:55,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:20:55,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:20:55,923 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:20:55,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:20:55,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:20:55,924 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:20:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 17:20:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 17:20:55,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:55,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:55,966 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-21 17:20:55,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:55,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97145229] [2020-08-21 17:20:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97145229] [2020-08-21 17:20:56,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507649888] [2020-08-21 17:20:56,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,217 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 17:20:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,290 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-21 17:20:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 17:20:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,309 INFO L225 Difference]: With dead ends: 69 [2020-08-21 17:20:56,310 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 17:20:56,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 17:20:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-21 17:20:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 17:20:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-21 17:20:56,356 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-21 17:20:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,357 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-21 17:20:56,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-21 17:20:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 17:20:56,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:20:56,359 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-21 17:20:56,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068642911] [2020-08-21 17:20:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068642911] [2020-08-21 17:20:56,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182166706] [2020-08-21 17:20:56,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,439 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-21 17:20:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,466 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-21 17:20:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 17:20:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,469 INFO L225 Difference]: With dead ends: 87 [2020-08-21 17:20:56,469 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 17:20:56,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 17:20:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-21 17:20:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 17:20:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-21 17:20:56,482 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-21 17:20:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,482 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-21 17:20:56,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-21 17:20:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:20:56,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:20:56,484 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-21 17:20:56,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053737268] [2020-08-21 17:20:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053737268] [2020-08-21 17:20:56,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589844121] [2020-08-21 17:20:56,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,547 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-21 17:20:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,572 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-21 17:20:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:20:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,575 INFO L225 Difference]: With dead ends: 81 [2020-08-21 17:20:56,575 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 17:20:56,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 17:20:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-21 17:20:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 17:20:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-21 17:20:56,587 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-21 17:20:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,587 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-21 17:20:56,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-21 17:20:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:20:56,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:20:56,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-21 17:20:56,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751182771] [2020-08-21 17:20:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751182771] [2020-08-21 17:20:56,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698198586] [2020-08-21 17:20:56,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,647 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-21 17:20:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,672 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-21 17:20:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:20:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,675 INFO L225 Difference]: With dead ends: 100 [2020-08-21 17:20:56,675 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 17:20:56,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 17:20:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-21 17:20:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 17:20:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-21 17:20:56,690 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-21 17:20:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,695 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-21 17:20:56,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-21 17:20:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:20:56,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:20:56,697 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-21 17:20:56,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73212758] [2020-08-21 17:20:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73212758] [2020-08-21 17:20:56,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717626105] [2020-08-21 17:20:56,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,739 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-21 17:20:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,768 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-21 17:20:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:20:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,771 INFO L225 Difference]: With dead ends: 164 [2020-08-21 17:20:56,771 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 17:20:56,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 17:20:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-21 17:20:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 17:20:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-21 17:20:56,782 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-21 17:20:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,783 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-21 17:20:56,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-21 17:20:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:56,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:20:56,785 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-21 17:20:56,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519846795] [2020-08-21 17:20:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519846795] [2020-08-21 17:20:56,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591418342] [2020-08-21 17:20:56,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,835 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-21 17:20:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,860 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-21 17:20:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 17:20:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,863 INFO L225 Difference]: With dead ends: 147 [2020-08-21 17:20:56,863 INFO L226 Difference]: Without dead ends: 102 [2020-08-21 17:20:56,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-21 17:20:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-21 17:20:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 17:20:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-21 17:20:56,875 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-21 17:20:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,875 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-21 17:20:56,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-21 17:20:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:56,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:20:56,878 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-21 17:20:56,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168004787] [2020-08-21 17:20:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168004787] [2020-08-21 17:20:56,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:56,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124966938] [2020-08-21 17:20:56,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:56,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,920 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-21 17:20:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,938 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-21 17:20:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:56,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 17:20:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,941 INFO L225 Difference]: With dead ends: 180 [2020-08-21 17:20:56,941 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 17:20:56,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 17:20:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-21 17:20:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 17:20:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-21 17:20:56,955 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-21 17:20:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,955 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-21 17:20:56,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-21 17:20:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:56,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:20:56,958 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-21 17:20:56,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023718259] [2020-08-21 17:20:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023718259] [2020-08-21 17:20:57,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031566427] [2020-08-21 17:20:57,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,003 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-21 17:20:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,039 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 17:20:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 17:20:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,041 INFO L225 Difference]: With dead ends: 312 [2020-08-21 17:20:57,041 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 17:20:57,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 17:20:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-21 17:20:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 17:20:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-21 17:20:57,056 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-21 17:20:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,056 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-21 17:20:57,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-21 17:20:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:20:57,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:20:57,059 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-21 17:20:57,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140659272] [2020-08-21 17:20:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140659272] [2020-08-21 17:20:57,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244811045] [2020-08-21 17:20:57,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,088 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-21 17:20:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,108 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-21 17:20:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 17:20:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,110 INFO L225 Difference]: With dead ends: 276 [2020-08-21 17:20:57,111 INFO L226 Difference]: Without dead ends: 190 [2020-08-21 17:20:57,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-21 17:20:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-21 17:20:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 17:20:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-21 17:20:57,126 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-21 17:20:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,127 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-21 17:20:57,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-21 17:20:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:20:57,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:20:57,129 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-21 17:20:57,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996238611] [2020-08-21 17:20:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996238611] [2020-08-21 17:20:57,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732304736] [2020-08-21 17:20:57,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,158 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-21 17:20:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,179 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-21 17:20:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 17:20:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,182 INFO L225 Difference]: With dead ends: 332 [2020-08-21 17:20:57,182 INFO L226 Difference]: Without dead ends: 330 [2020-08-21 17:20:57,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-21 17:20:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-21 17:20:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 17:20:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-21 17:20:57,198 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-21 17:20:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,199 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-21 17:20:57,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-21 17:20:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:20:57,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:20:57,202 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-21 17:20:57,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632974049] [2020-08-21 17:20:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632974049] [2020-08-21 17:20:57,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522823418] [2020-08-21 17:20:57,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,232 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-21 17:20:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,258 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-21 17:20:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 17:20:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,261 INFO L225 Difference]: With dead ends: 604 [2020-08-21 17:20:57,261 INFO L226 Difference]: Without dead ends: 354 [2020-08-21 17:20:57,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-21 17:20:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-21 17:20:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-21 17:20:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-21 17:20:57,276 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-21 17:20:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,277 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-21 17:20:57,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-21 17:20:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:20:57,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:20:57,280 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-21 17:20:57,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898193225] [2020-08-21 17:20:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898193225] [2020-08-21 17:20:57,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885137177] [2020-08-21 17:20:57,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,313 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-21 17:20:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,336 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-21 17:20:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 17:20:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,339 INFO L225 Difference]: With dead ends: 528 [2020-08-21 17:20:57,340 INFO L226 Difference]: Without dead ends: 362 [2020-08-21 17:20:57,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-21 17:20:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-21 17:20:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 17:20:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-21 17:20:57,353 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-21 17:20:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,353 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-21 17:20:57,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-21 17:20:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:20:57,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:20:57,355 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-21 17:20:57,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121516784] [2020-08-21 17:20:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121516784] [2020-08-21 17:20:57,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958786614] [2020-08-21 17:20:57,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,382 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-21 17:20:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,414 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-21 17:20:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 17:20:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,418 INFO L225 Difference]: With dead ends: 620 [2020-08-21 17:20:57,418 INFO L226 Difference]: Without dead ends: 618 [2020-08-21 17:20:57,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-21 17:20:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-21 17:20:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-21 17:20:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-21 17:20:57,436 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-21 17:20:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,436 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-21 17:20:57,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-21 17:20:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:20:57,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:20:57,438 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-21 17:20:57,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180113284] [2020-08-21 17:20:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180113284] [2020-08-21 17:20:57,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631383133] [2020-08-21 17:20:57,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,465 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-21 17:20:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,492 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-21 17:20:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 17:20:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,496 INFO L225 Difference]: With dead ends: 1180 [2020-08-21 17:20:57,496 INFO L226 Difference]: Without dead ends: 682 [2020-08-21 17:20:57,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-21 17:20:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-21 17:20:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-21 17:20:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-21 17:20:57,518 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-21 17:20:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,518 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-21 17:20:57,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-21 17:20:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:20:57,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:20:57,520 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,521 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-21 17:20:57,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104638255] [2020-08-21 17:20:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104638255] [2020-08-21 17:20:57,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162701095] [2020-08-21 17:20:57,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,543 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-21 17:20:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,566 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-21 17:20:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:20:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,570 INFO L225 Difference]: With dead ends: 1020 [2020-08-21 17:20:57,570 INFO L226 Difference]: Without dead ends: 698 [2020-08-21 17:20:57,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-21 17:20:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-21 17:20:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-21 17:20:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-21 17:20:57,593 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-21 17:20:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,594 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-21 17:20:57,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-21 17:20:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:20:57,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:20:57,596 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-21 17:20:57,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786849781] [2020-08-21 17:20:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786849781] [2020-08-21 17:20:57,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883177558] [2020-08-21 17:20:57,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,624 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-21 17:20:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,655 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-21 17:20:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:20:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,661 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 17:20:57,661 INFO L226 Difference]: Without dead ends: 1162 [2020-08-21 17:20:57,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-21 17:20:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-21 17:20:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-21 17:20:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-21 17:20:57,693 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-21 17:20:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,693 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-21 17:20:57,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-21 17:20:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:20:57,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 17:20:57,696 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-21 17:20:57,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554708579] [2020-08-21 17:20:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554708579] [2020-08-21 17:20:57,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130200237] [2020-08-21 17:20:57,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,718 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-21 17:20:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,779 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-21 17:20:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:20:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,786 INFO L225 Difference]: With dead ends: 2316 [2020-08-21 17:20:57,786 INFO L226 Difference]: Without dead ends: 1322 [2020-08-21 17:20:57,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-21 17:20:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-21 17:20:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-21 17:20:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-21 17:20:57,838 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-21 17:20:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,838 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-21 17:20:57,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-21 17:20:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:20:57,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 17:20:57,842 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,842 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-21 17:20:57,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388093610] [2020-08-21 17:20:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388093610] [2020-08-21 17:20:57,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:57,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311070609] [2020-08-21 17:20:57,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:57,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,875 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-21 17:20:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,917 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-21 17:20:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:57,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 17:20:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,924 INFO L225 Difference]: With dead ends: 1980 [2020-08-21 17:20:57,924 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 17:20:57,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 17:20:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-21 17:20:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-21 17:20:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-21 17:20:57,972 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-21 17:20:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,974 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-21 17:20:57,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-21 17:20:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:20:57,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 17:20:57,977 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-21 17:20:57,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625634599] [2020-08-21 17:20:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:58,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:58,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625634599] [2020-08-21 17:20:58,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:58,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:58,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235320583] [2020-08-21 17:20:58,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:58,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:58,021 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-21 17:20:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:58,094 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-21 17:20:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:58,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 17:20:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:58,108 INFO L225 Difference]: With dead ends: 2186 [2020-08-21 17:20:58,109 INFO L226 Difference]: Without dead ends: 2184 [2020-08-21 17:20:58,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-21 17:20:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-21 17:20:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-21 17:20:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-21 17:20:58,200 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-21 17:20:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:58,201 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-21 17:20:58,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-21 17:20:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:20:58,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:58,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:58,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 17:20:58,207 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:58,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-21 17:20:58,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:58,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017617939] [2020-08-21 17:20:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:58,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:58,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017617939] [2020-08-21 17:20:58,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:58,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:58,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737519670] [2020-08-21 17:20:58,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:58,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:58,250 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-21 17:20:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:58,334 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-21 17:20:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:58,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 17:20:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:58,335 INFO L225 Difference]: With dead ends: 4552 [2020-08-21 17:20:58,335 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:20:58,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:20:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:20:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:20:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:20:58,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-21 17:20:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:58,344 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:20:58,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:20:58,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:20:58,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 17:20:58,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:20:58,373 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:20:58,373 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:58,373 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:58,374 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:20:58,374 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:20:58,374 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:20:58,374 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-21 17:20:58,374 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-21 17:20:58,374 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,374 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-21 17:20:58,374 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-21 17:20:58,375 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-21 17:20:58,375 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-21 17:20:58,375 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-21 17:20:58,375 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,375 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-21 17:20:58,375 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,375 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,376 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-21 17:20:58,376 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,376 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-21 17:20:58,376 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,376 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,376 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-21 17:20:58,376 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-21 17:20:58,377 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-21 17:20:58,377 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,378 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 17:20:58,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:20:58 BoogieIcfgContainer [2020-08-21 17:20:58,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:20:58,398 INFO L168 Benchmark]: Toolchain (without parser) took 3273.04 ms. Allocated memory was 138.4 MB in the beginning and 249.6 MB in the end (delta: 111.1 MB). Free memory was 101.4 MB in the beginning and 98.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 113.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:58,405 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 17:20:58,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.84 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 90.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:58,410 INFO L168 Benchmark]: Boogie Preprocessor took 109.53 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 178.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:58,410 INFO L168 Benchmark]: RCFGBuilder took 332.94 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 161.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:58,416 INFO L168 Benchmark]: TraceAbstraction took 2551.99 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 160.5 MB in the beginning and 98.7 MB in the end (delta: 61.9 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:58,418 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.84 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 90.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.53 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 178.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.94 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 161.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2551.99 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 160.5 MB in the beginning and 98.7 MB in the end (delta: 61.9 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...