/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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 [2020-08-22 01:25:42,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:25:42,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:25:42,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:25:42,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:25:42,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:25:42,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:25:42,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:25:42,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:25:42,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:25:42,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:25:42,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:25:42,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:25:42,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:25:42,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:25:42,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:25:42,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:25:42,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:25:42,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:25:42,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:25:42,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:25:42,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:25:42,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:25:42,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:25:42,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:25:42,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:25:42,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:25:42,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:25:42,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:25:42,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:25:42,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:25:42,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:25:42,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:25:42,449 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:25:42,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:25:42,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:25:42,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:25:42,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:25:42,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:25:42,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:25:42,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:25:42,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:25:42,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:25:42,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:25:42,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:25:42,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:25:42,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:25:42,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:25:42,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:25:42,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:25:42,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:42,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:25:42,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:25:42,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:25:42,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:25:42,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:25:42,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:25:42,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:25:42,457 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:25:42,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:25:42,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:25:42,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:25:42,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:25:42,856 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:25:42,857 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 01:25:42,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56430e606/beafdae3d9a8464ab85a97b6b198cf28/FLAG2cbf6b69b [2020-08-22 01:25:43,449 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:25:43,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 01:25:43,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56430e606/beafdae3d9a8464ab85a97b6b198cf28/FLAG2cbf6b69b [2020-08-22 01:25:43,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56430e606/beafdae3d9a8464ab85a97b6b198cf28 [2020-08-22 01:25:43,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:25:43,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:25:43,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:43,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:25:43,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:25:43,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:43" (1/1) ... [2020-08-22 01:25:43,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42db8c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:43, skipping insertion in model container [2020-08-22 01:25:43,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:43" (1/1) ... [2020-08-22 01:25:43,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:25:43,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:25:44,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:44,080 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:25:44,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:44,222 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:25:44,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44 WrapperNode [2020-08-22 01:25:44,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:44,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:25:44,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:25:44,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:25:44,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... [2020-08-22 01:25:44,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:25:44,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:25:44,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:25:44,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:25:44,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:44,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:25:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:25:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:25:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:25:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:25:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:25:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:25:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:25:44,685 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:25:44,686 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 01:25:44,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:44 BoogieIcfgContainer [2020-08-22 01:25:44,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:25:44,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:25:44,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:25:44,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:25:44,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:25:43" (1/3) ... [2020-08-22 01:25:44,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364766bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:44, skipping insertion in model container [2020-08-22 01:25:44,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:44" (2/3) ... [2020-08-22 01:25:44,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364766bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:44, skipping insertion in model container [2020-08-22 01:25:44,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:44" (3/3) ... [2020-08-22 01:25:44,716 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-22 01:25:44,732 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:25:44,740 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:25:44,758 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:25:44,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:25:44,786 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:25:44,786 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:25:44,786 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:25:44,787 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:25:44,787 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:25:44,787 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:25:44,787 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:25:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 01:25:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 01:25:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:44,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:44,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-22 01:25:44,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:44,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693732840] [2020-08-22 01:25:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693732840] [2020-08-22 01:25:45,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141575872] [2020-08-22 01:25:45,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,064 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 01:25:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,126 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-22 01:25:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 01:25:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,143 INFO L225 Difference]: With dead ends: 69 [2020-08-22 01:25:45,143 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:25:45,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:25:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-22 01:25:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 01:25:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-22 01:25:45,198 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-22 01:25:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,199 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-22 01:25:45,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-22 01:25:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 01:25:45,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:25:45,202 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-22 01:25:45,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927491635] [2020-08-22 01:25:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927491635] [2020-08-22 01:25:45,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565506374] [2020-08-22 01:25:45,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,287 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-22 01:25:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,318 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-22 01:25:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 01:25:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,320 INFO L225 Difference]: With dead ends: 87 [2020-08-22 01:25:45,321 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:25:45,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:25:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-22 01:25:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 01:25:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-22 01:25:45,334 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-22 01:25:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,334 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-22 01:25:45,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-22 01:25:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:25:45,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:25:45,337 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-22 01:25:45,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001311122] [2020-08-22 01:25:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001311122] [2020-08-22 01:25:45,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445832905] [2020-08-22 01:25:45,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,398 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-22 01:25:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,436 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-22 01:25:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 01:25:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,441 INFO L225 Difference]: With dead ends: 81 [2020-08-22 01:25:45,442 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 01:25:45,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 01:25:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-22 01:25:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 01:25:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-22 01:25:45,463 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-22 01:25:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,464 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-22 01:25:45,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-22 01:25:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:25:45,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:25:45,467 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-22 01:25:45,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529618630] [2020-08-22 01:25:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529618630] [2020-08-22 01:25:45,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053065289] [2020-08-22 01:25:45,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,534 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-22 01:25:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,554 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-22 01:25:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 01:25:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,556 INFO L225 Difference]: With dead ends: 100 [2020-08-22 01:25:45,556 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 01:25:45,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 01:25:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-22 01:25:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 01:25:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-22 01:25:45,567 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-22 01:25:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,568 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-22 01:25:45,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-22 01:25:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:25:45,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:25:45,570 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-22 01:25:45,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631685023] [2020-08-22 01:25:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631685023] [2020-08-22 01:25:45,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501447601] [2020-08-22 01:25:45,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,605 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-22 01:25:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,627 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-22 01:25:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 01:25:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,629 INFO L225 Difference]: With dead ends: 164 [2020-08-22 01:25:45,630 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 01:25:45,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 01:25:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-22 01:25:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 01:25:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-22 01:25:45,644 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-22 01:25:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,645 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-22 01:25:45,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-22 01:25:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:45,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:25:45,647 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-22 01:25:45,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978968270] [2020-08-22 01:25:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978968270] [2020-08-22 01:25:45,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481728983] [2020-08-22 01:25:45,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,686 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-22 01:25:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,706 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-22 01:25:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 01:25:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,708 INFO L225 Difference]: With dead ends: 147 [2020-08-22 01:25:45,709 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 01:25:45,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 01:25:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-22 01:25:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 01:25:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-22 01:25:45,724 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-22 01:25:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,724 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-22 01:25:45,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-22 01:25:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:45,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:25:45,727 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-22 01:25:45,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482269194] [2020-08-22 01:25:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482269194] [2020-08-22 01:25:45,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897009675] [2020-08-22 01:25:45,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,763 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-22 01:25:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,786 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-22 01:25:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 01:25:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,788 INFO L225 Difference]: With dead ends: 180 [2020-08-22 01:25:45,788 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 01:25:45,789 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 [2020-08-22 01:25:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 01:25:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-22 01:25:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 01:25:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-22 01:25:45,813 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-22 01:25:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,813 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-22 01:25:45,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-22 01:25:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:45,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:25:45,816 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-22 01:25:45,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005861989] [2020-08-22 01:25:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005861989] [2020-08-22 01:25:45,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384402805] [2020-08-22 01:25:45,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,901 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-22 01:25:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,923 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 01:25:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 01:25:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,926 INFO L225 Difference]: With dead ends: 312 [2020-08-22 01:25:45,937 INFO L226 Difference]: Without dead ends: 186 [2020-08-22 01:25:45,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-22 01:25:45,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-22 01:25:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 01:25:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-22 01:25:45,953 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-22 01:25:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,953 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-22 01:25:45,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-22 01:25:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:45,955 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:45,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:25:45,956 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-22 01:25:45,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398026111] [2020-08-22 01:25:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398026111] [2020-08-22 01:25:45,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308721390] [2020-08-22 01:25:45,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,988 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-22 01:25:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,020 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-22 01:25:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:25:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,022 INFO L225 Difference]: With dead ends: 276 [2020-08-22 01:25:46,023 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 01:25:46,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 01:25:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-22 01:25:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 01:25:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-22 01:25:46,042 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-22 01:25:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,042 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-22 01:25:46,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-22 01:25:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:25:46,045 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-22 01:25:46,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783367261] [2020-08-22 01:25:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783367261] [2020-08-22 01:25:46,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195000293] [2020-08-22 01:25:46,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,073 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-22 01:25:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,097 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-22 01:25:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:25:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,103 INFO L225 Difference]: With dead ends: 332 [2020-08-22 01:25:46,103 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 01:25:46,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 01:25:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-22 01:25:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 01:25:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-22 01:25:46,116 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-22 01:25:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,116 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-22 01:25:46,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-22 01:25:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:46,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:25:46,120 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-22 01:25:46,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546440393] [2020-08-22 01:25:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546440393] [2020-08-22 01:25:46,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428274213] [2020-08-22 01:25:46,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,170 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-22 01:25:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,198 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-22 01:25:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:25:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,201 INFO L225 Difference]: With dead ends: 604 [2020-08-22 01:25:46,201 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 01:25:46,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 01:25:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-22 01:25:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-22 01:25:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-22 01:25:46,219 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-22 01:25:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,219 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-22 01:25:46,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-22 01:25:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:46,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:25:46,222 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-22 01:25:46,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198994651] [2020-08-22 01:25:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198994651] [2020-08-22 01:25:46,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687620104] [2020-08-22 01:25:46,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,247 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-22 01:25:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,267 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-22 01:25:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,270 INFO L225 Difference]: With dead ends: 528 [2020-08-22 01:25:46,270 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 01:25:46,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 01:25:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-22 01:25:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 01:25:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-22 01:25:46,284 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-22 01:25:46,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,285 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-22 01:25:46,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-22 01:25:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:46,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:25:46,287 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-22 01:25:46,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636982310] [2020-08-22 01:25:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636982310] [2020-08-22 01:25:46,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272588472] [2020-08-22 01:25:46,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,360 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-22 01:25:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,406 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-22 01:25:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,410 INFO L225 Difference]: With dead ends: 620 [2020-08-22 01:25:46,411 INFO L226 Difference]: Without dead ends: 618 [2020-08-22 01:25:46,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-22 01:25:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-22 01:25:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-22 01:25:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-22 01:25:46,431 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-22 01:25:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,432 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-22 01:25:46,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-22 01:25:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:46,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:25:46,435 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-22 01:25:46,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64667894] [2020-08-22 01:25:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64667894] [2020-08-22 01:25:46,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569130031] [2020-08-22 01:25:46,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,480 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-22 01:25:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,520 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-22 01:25:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,524 INFO L225 Difference]: With dead ends: 1180 [2020-08-22 01:25:46,524 INFO L226 Difference]: Without dead ends: 682 [2020-08-22 01:25:46,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-22 01:25:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-22 01:25:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-22 01:25:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-22 01:25:46,551 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-22 01:25:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,551 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-22 01:25:46,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-22 01:25:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:46,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:25:46,554 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-22 01:25:46,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422628893] [2020-08-22 01:25:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422628893] [2020-08-22 01:25:46,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552314200] [2020-08-22 01:25:46,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,596 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-22 01:25:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,625 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-22 01:25:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,631 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 01:25:46,631 INFO L226 Difference]: Without dead ends: 698 [2020-08-22 01:25:46,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-22 01:25:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-22 01:25:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-22 01:25:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-22 01:25:46,658 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-22 01:25:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,659 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-22 01:25:46,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-22 01:25:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:46,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:25:46,662 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-22 01:25:46,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591823638] [2020-08-22 01:25:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591823638] [2020-08-22 01:25:46,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229171346] [2020-08-22 01:25:46,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,712 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-22 01:25:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,751 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-22 01:25:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,758 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 01:25:46,759 INFO L226 Difference]: Without dead ends: 1162 [2020-08-22 01:25:46,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-22 01:25:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-22 01:25:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-22 01:25:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-22 01:25:46,806 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-22 01:25:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,806 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-22 01:25:46,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-22 01:25:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:46,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:25:46,810 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-22 01:25:46,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928014155] [2020-08-22 01:25:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928014155] [2020-08-22 01:25:46,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043894064] [2020-08-22 01:25:46,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,841 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-22 01:25:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,920 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-22 01:25:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,927 INFO L225 Difference]: With dead ends: 2316 [2020-08-22 01:25:46,927 INFO L226 Difference]: Without dead ends: 1322 [2020-08-22 01:25:46,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-22 01:25:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-22 01:25:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-22 01:25:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-22 01:25:46,975 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-22 01:25:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,976 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-22 01:25:46,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-22 01:25:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:46,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:25:46,980 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-22 01:25:46,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198191987] [2020-08-22 01:25:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:47,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198191987] [2020-08-22 01:25:47,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659734936] [2020-08-22 01:25:47,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,024 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-22 01:25:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,068 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-22 01:25:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,076 INFO L225 Difference]: With dead ends: 1980 [2020-08-22 01:25:47,076 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 01:25:47,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 01:25:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-22 01:25:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-22 01:25:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-22 01:25:47,129 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-22 01:25:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,130 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-22 01:25:47,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-22 01:25:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:47,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:25:47,134 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-22 01:25:47,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615421653] [2020-08-22 01:25:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:47,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615421653] [2020-08-22 01:25:47,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5811672] [2020-08-22 01:25:47,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,166 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-22 01:25:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,215 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-22 01:25:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,225 INFO L225 Difference]: With dead ends: 2186 [2020-08-22 01:25:47,225 INFO L226 Difference]: Without dead ends: 2184 [2020-08-22 01:25:47,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-22 01:25:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-22 01:25:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-22 01:25:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-22 01:25:47,307 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-22 01:25:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,307 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-22 01:25:47,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-22 01:25:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:47,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:25:47,312 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-22 01:25:47,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036063771] [2020-08-22 01:25:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:47,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036063771] [2020-08-22 01:25:47,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252471882] [2020-08-22 01:25:47,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,367 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-22 01:25:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,461 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-22 01:25:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,462 INFO L225 Difference]: With dead ends: 4552 [2020-08-22 01:25:47,462 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:25:47,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:25:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:25:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:25:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:25:47,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-22 01:25:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,470 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:25:47,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:25:47,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:25:47,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:25:47,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 01:25:47,499 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 01:25:47,499 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:25:47,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:25:47,500 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 01:25:47,500 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 01:25:47,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 01:25:47,500 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-22 01:25:47,500 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-22 01:25:47,500 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,500 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-22 01:25:47,501 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-22 01:25:47,501 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-22 01:25:47,501 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-22 01:25:47,501 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-22 01:25:47,501 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,501 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-22 01:25:47,501 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-22 01:25:47,502 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,503 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-22 01:25:47,504 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-22 01:25:47,504 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,504 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 01:25:47,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:25:47 BoogieIcfgContainer [2020-08-22 01:25:47,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:25:47,520 INFO L168 Benchmark]: Toolchain (without parser) took 3706.58 ms. Allocated memory was 136.3 MB in the beginning and 253.8 MB in the end (delta: 117.4 MB). Free memory was 100.1 MB in the beginning and 106.8 MB in the end (delta: -6.8 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:47,521 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 117.9 MB in the beginning and 117.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:25:47,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.94 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 99.9 MB in the beginning and 177.9 MB in the end (delta: -78.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:47,522 INFO L168 Benchmark]: Boogie Preprocessor took 51.61 ms. Allocated memory is still 199.2 MB. Free memory was 177.9 MB in the beginning and 175.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:47,522 INFO L168 Benchmark]: RCFGBuilder took 419.17 ms. Allocated memory is still 199.2 MB. Free memory was 175.9 MB in the beginning and 159.3 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:47,523 INFO L168 Benchmark]: TraceAbstraction took 2811.88 ms. Allocated memory was 199.2 MB in the beginning and 253.8 MB in the end (delta: 54.5 MB). Free memory was 158.6 MB in the beginning and 106.8 MB in the end (delta: 51.8 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:47,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 117.9 MB in the beginning and 117.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 409.94 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 99.9 MB in the beginning and 177.9 MB in the end (delta: -78.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.61 ms. Allocated memory is still 199.2 MB. Free memory was 177.9 MB in the beginning and 175.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.17 ms. Allocated memory is still 199.2 MB. Free memory was 175.9 MB in the beginning and 159.3 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2811.88 ms. Allocated memory was 199.2 MB in the beginning and 253.8 MB in the end (delta: 54.5 MB). Free memory was 158.6 MB in the beginning and 106.8 MB in the end (delta: 51.8 MB). Peak memory consumption was 106.3 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: 2.6s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...