/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=WIDEST --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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:11:03,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:11:03,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:11:03,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:11:03,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:11:03,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:11:03,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:11:03,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:11:03,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:11:03,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:11:03,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:11:03,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:11:03,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:11:03,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:11:03,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:11:03,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:11:03,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:11:03,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:11:03,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:11:03,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:11:03,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:11:03,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:11:03,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:11:03,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:11:03,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:11:03,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:11:03,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:11:03,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:11:03,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:11:03,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:11:03,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:11:03,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:11:03,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:11:03,192 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:11:03,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:11:03,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:11:03,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:11:03,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:11:03,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:11:03,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:11:03,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:11:03,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:11:03,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:11:03,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:11:03,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:11:03,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:11:03,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:11:03,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:11:03,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:11:03,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:11:03,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:11:03,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:11:03,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:11:03,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:11:03,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:11:03,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:11:03,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:11:03,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:11:03,198 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:11:03,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:11:03,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:11:03,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:11:03,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:11:03,501 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:11:03,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 22:11:03,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/840d8693b/aa281b9c39b64d58b276d1d7757b95a2/FLAG3948226b3 [2020-08-21 22:11:03,989 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:11:03,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 22:11:03,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/840d8693b/aa281b9c39b64d58b276d1d7757b95a2/FLAG3948226b3 [2020-08-21 22:11:04,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/840d8693b/aa281b9c39b64d58b276d1d7757b95a2 [2020-08-21 22:11:04,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:11:04,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:11:04,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:11:04,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:11:04,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:11:04,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04, skipping insertion in model container [2020-08-21 22:11:04,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:11:04,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:11:04,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:11:04,682 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:11:04,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:11:04,722 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:11:04,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04 WrapperNode [2020-08-21 22:11:04,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:11:04,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:11:04,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:11:04,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:11:04,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... [2020-08-21 22:11:04,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:11:04,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:11:04,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:11:04,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:11:04,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:11:04,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:11:04,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:11:04,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:11:04,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:11:04,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:11:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:11:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:11:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:11:05,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:11:05,303 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:11:05,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:05 BoogieIcfgContainer [2020-08-21 22:11:05,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:11:05,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:11:05,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:11:05,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:11:05,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:11:04" (1/3) ... [2020-08-21 22:11:05,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300e82e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:05, skipping insertion in model container [2020-08-21 22:11:05,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:04" (2/3) ... [2020-08-21 22:11:05,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300e82e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:05, skipping insertion in model container [2020-08-21 22:11:05,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:05" (3/3) ... [2020-08-21 22:11:05,322 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 22:11:05,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:11:05,337 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:11:05,349 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:11:05,370 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:11:05,370 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:11:05,371 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:11:05,371 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:11:05,371 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:11:05,371 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:11:05,371 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:11:05,371 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:11:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 22:11:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:11:05,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:05,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:05,396 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 22:11:05,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:05,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234700562] [2020-08-21 22:11:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:05,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234700562] [2020-08-21 22:11:05,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:05,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:05,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009551733] [2020-08-21 22:11:05,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:05,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:05,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:05,634 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 22:11:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:05,704 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 22:11:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:05,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:11:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:05,718 INFO L225 Difference]: With dead ends: 87 [2020-08-21 22:11:05,718 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 22:11:05,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 22:11:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 22:11:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 22:11:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 22:11:05,769 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 22:11:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:05,770 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 22:11:05,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 22:11:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:11:05,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:05,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:05,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:11:05,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 22:11:05,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:05,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119557712] [2020-08-21 22:11:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:05,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119557712] [2020-08-21 22:11:05,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:05,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:05,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183826967] [2020-08-21 22:11:05,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:05,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:05,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:05,851 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 22:11:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:05,903 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 22:11:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:05,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:11:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:05,907 INFO L225 Difference]: With dead ends: 117 [2020-08-21 22:11:05,907 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 22:11:05,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 22:11:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 22:11:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 22:11:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 22:11:05,921 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 22:11:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:05,921 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 22:11:05,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 22:11:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:11:05,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:05,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:05,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:11:05,924 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 22:11:05,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:05,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560130667] [2020-08-21 22:11:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:05,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:05,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560130667] [2020-08-21 22:11:05,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:05,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:05,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38101928] [2020-08-21 22:11:05,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:05,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:05,989 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 22:11:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,027 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 22:11:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:11:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,029 INFO L225 Difference]: With dead ends: 108 [2020-08-21 22:11:06,030 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 22:11:06,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 22:11:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 22:11:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 22:11:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 22:11:06,041 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 22:11:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,041 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 22:11:06,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 22:11:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:11:06,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:11:06,045 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 22:11:06,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228018613] [2020-08-21 22:11:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228018613] [2020-08-21 22:11:06,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373029838] [2020-08-21 22:11:06,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,135 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 22:11:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,157 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 22:11:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:11:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,160 INFO L225 Difference]: With dead ends: 136 [2020-08-21 22:11:06,160 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 22:11:06,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 22:11:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 22:11:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 22:11:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 22:11:06,171 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 22:11:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,172 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 22:11:06,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 22:11:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:11:06,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:11:06,174 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,174 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 22:11:06,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235908702] [2020-08-21 22:11:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235908702] [2020-08-21 22:11:06,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911453051] [2020-08-21 22:11:06,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,248 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 22:11:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,287 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 22:11:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:11:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,294 INFO L225 Difference]: With dead ends: 224 [2020-08-21 22:11:06,295 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 22:11:06,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 22:11:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 22:11:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 22:11:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 22:11:06,324 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 22:11:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,324 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 22:11:06,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 22:11:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:11:06,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:11:06,330 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 22:11:06,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588211304] [2020-08-21 22:11:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588211304] [2020-08-21 22:11:06,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290514649] [2020-08-21 22:11:06,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,366 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 22:11:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,387 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 22:11:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:11:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,390 INFO L225 Difference]: With dead ends: 201 [2020-08-21 22:11:06,390 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 22:11:06,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 22:11:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 22:11:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 22:11:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 22:11:06,417 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 22:11:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,417 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 22:11:06,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 22:11:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:11:06,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:11:06,425 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 22:11:06,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624176329] [2020-08-21 22:11:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624176329] [2020-08-21 22:11:06,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639716167] [2020-08-21 22:11:06,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,484 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 22:11:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,519 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 22:11:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:11:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,524 INFO L225 Difference]: With dead ends: 252 [2020-08-21 22:11:06,524 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 22:11:06,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 22:11:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 22:11:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 22:11:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 22:11:06,544 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 22:11:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,545 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 22:11:06,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 22:11:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:11:06,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:11:06,549 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 22:11:06,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56941161] [2020-08-21 22:11:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56941161] [2020-08-21 22:11:06,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045250440] [2020-08-21 22:11:06,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,604 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 22:11:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,645 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 22:11:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:11:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,647 INFO L225 Difference]: With dead ends: 432 [2020-08-21 22:11:06,648 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 22:11:06,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 22:11:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 22:11:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 22:11:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 22:11:06,663 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 22:11:06,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,663 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 22:11:06,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 22:11:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:11:06,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:11:06,667 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 22:11:06,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282482221] [2020-08-21 22:11:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282482221] [2020-08-21 22:11:06,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057888761] [2020-08-21 22:11:06,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,716 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 22:11:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,755 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 22:11:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:11:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,759 INFO L225 Difference]: With dead ends: 384 [2020-08-21 22:11:06,759 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 22:11:06,760 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 [2020-08-21 22:11:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 22:11:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 22:11:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 22:11:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 22:11:06,779 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 22:11:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,780 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 22:11:06,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 22:11:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:11:06,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:11:06,789 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 22:11:06,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844114305] [2020-08-21 22:11:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844114305] [2020-08-21 22:11:06,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234117266] [2020-08-21 22:11:06,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,819 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 22:11:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,843 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 22:11:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:11:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,847 INFO L225 Difference]: With dead ends: 476 [2020-08-21 22:11:06,847 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 22:11:06,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 22:11:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 22:11:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 22:11:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 22:11:06,864 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 22:11:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,864 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 22:11:06,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 22:11:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:11:06,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:11:06,867 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,867 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 22:11:06,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668106753] [2020-08-21 22:11:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668106753] [2020-08-21 22:11:06,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284402762] [2020-08-21 22:11:06,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,892 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 22:11:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,918 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 22:11:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:11:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,922 INFO L225 Difference]: With dead ends: 844 [2020-08-21 22:11:06,922 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 22:11:06,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 22:11:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 22:11:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 22:11:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 22:11:06,942 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 22:11:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,942 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 22:11:06,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 22:11:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:11:06,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:11:06,944 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 22:11:06,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306691461] [2020-08-21 22:11:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:06,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306691461] [2020-08-21 22:11:06,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:06,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:06,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476658737] [2020-08-21 22:11:06,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:06,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:06,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,969 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 22:11:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,989 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 22:11:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:06,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:11:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,993 INFO L225 Difference]: With dead ends: 744 [2020-08-21 22:11:06,993 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 22:11:06,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 22:11:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 22:11:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 22:11:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 22:11:07,012 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 22:11:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,012 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 22:11:07,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 22:11:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:11:07,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:11:07,014 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 22:11:07,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425194628] [2020-08-21 22:11:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425194628] [2020-08-21 22:11:07,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994032089] [2020-08-21 22:11:07,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,039 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 22:11:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,063 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 22:11:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:11:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,068 INFO L225 Difference]: With dead ends: 908 [2020-08-21 22:11:07,069 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 22:11:07,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 22:11:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 22:11:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 22:11:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 22:11:07,095 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 22:11:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,095 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 22:11:07,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 22:11:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:11:07,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:11:07,098 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 22:11:07,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967725469] [2020-08-21 22:11:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967725469] [2020-08-21 22:11:07,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780970680] [2020-08-21 22:11:07,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,132 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 22:11:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,164 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 22:11:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:11:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,170 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 22:11:07,171 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 22:11:07,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 22:11:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 22:11:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 22:11:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 22:11:07,206 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 22:11:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,207 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 22:11:07,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 22:11:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:11:07,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:11:07,210 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 22:11:07,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734318940] [2020-08-21 22:11:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734318940] [2020-08-21 22:11:07,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837996579] [2020-08-21 22:11:07,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,246 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 22:11:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,278 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 22:11:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:11:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,284 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 22:11:07,284 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 22:11:07,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 22:11:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 22:11:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 22:11:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 22:11:07,318 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 22:11:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,319 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 22:11:07,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 22:11:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:11:07,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:11:07,322 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 22:11:07,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054045982] [2020-08-21 22:11:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054045982] [2020-08-21 22:11:07,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477752891] [2020-08-21 22:11:07,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,366 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 22:11:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,410 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 22:11:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:11:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,422 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 22:11:07,423 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 22:11:07,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 22:11:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 22:11:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 22:11:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 22:11:07,496 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 22:11:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,496 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 22:11:07,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 22:11:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:11:07,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:11:07,501 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 22:11:07,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133174513] [2020-08-21 22:11:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133174513] [2020-08-21 22:11:07,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244665110] [2020-08-21 22:11:07,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,538 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 22:11:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,603 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 22:11:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:11:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,615 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 22:11:07,615 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 22:11:07,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 22:11:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 22:11:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 22:11:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 22:11:07,704 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 22:11:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,704 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 22:11:07,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 22:11:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:11:07,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:11:07,708 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,708 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 22:11:07,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951842070] [2020-08-21 22:11:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951842070] [2020-08-21 22:11:07,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650476032] [2020-08-21 22:11:07,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,738 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 22:11:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,790 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 22:11:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:11:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,801 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 22:11:07,801 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 22:11:07,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 22:11:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 22:11:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 22:11:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 22:11:07,860 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 22:11:07,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,861 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 22:11:07,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 22:11:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:11:07,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:07,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:11:07,864 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 22:11:07,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840461075] [2020-08-21 22:11:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840461075] [2020-08-21 22:11:07,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890408293] [2020-08-21 22:11:07,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,911 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 22:11:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,972 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 22:11:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:11:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,988 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 22:11:07,988 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 22:11:07,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 22:11:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 22:11:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 22:11:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 22:11:08,074 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 22:11:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,074 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 22:11:08,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 22:11:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:11:08,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:11:08,080 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 22:11:08,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268655955] [2020-08-21 22:11:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268655955] [2020-08-21 22:11:08,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611322498] [2020-08-21 22:11:08,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,102 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 22:11:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,178 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 22:11:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:11:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,195 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 22:11:08,195 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 22:11:08,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 22:11:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 22:11:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 22:11:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 22:11:08,306 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 22:11:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,307 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 22:11:08,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 22:11:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:11:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:11:08,313 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 22:11:08,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398491645] [2020-08-21 22:11:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398491645] [2020-08-21 22:11:08,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711732463] [2020-08-21 22:11:08,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,335 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 22:11:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,434 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 22:11:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:11:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,453 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 22:11:08,453 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 22:11:08,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 22:11:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 22:11:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 22:11:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 22:11:08,568 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 22:11:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,569 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 22:11:08,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 22:11:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:11:08,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:11:08,574 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 22:11:08,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003911878] [2020-08-21 22:11:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003911878] [2020-08-21 22:11:08,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780417535] [2020-08-21 22:11:08,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,603 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 22:11:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,730 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 22:11:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:11:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,795 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 22:11:08,795 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 22:11:08,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 22:11:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 22:11:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 22:11:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 22:11:09,169 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 22:11:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,170 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 22:11:09,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 22:11:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:11:09,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:11:09,184 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 22:11:09,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511529424] [2020-08-21 22:11:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511529424] [2020-08-21 22:11:09,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430784957] [2020-08-21 22:11:09,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,222 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 22:11:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,412 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 22:11:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:11:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,439 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 22:11:09,439 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 22:11:09,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 22:11:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 22:11:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 22:11:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 22:11:09,694 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 22:11:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,694 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 22:11:09,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 22:11:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:11:09,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:11:09,704 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 22:11:09,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156208810] [2020-08-21 22:11:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156208810] [2020-08-21 22:11:09,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809172569] [2020-08-21 22:11:09,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,737 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 22:11:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,011 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 22:11:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:10,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:11:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,037 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 22:11:10,037 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 22:11:10,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 22:11:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 22:11:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 22:11:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 22:11:10,312 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 22:11:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:10,313 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 22:11:10,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 22:11:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:11:10,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:10,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:10,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:11:10,330 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 22:11:10,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:10,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657041602] [2020-08-21 22:11:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:10,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657041602] [2020-08-21 22:11:10,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:10,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:10,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593934008] [2020-08-21 22:11:10,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:10,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:10,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:10,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,371 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 22:11:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,693 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 22:11:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:10,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:11:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,720 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 22:11:10,721 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 22:11:10,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 22:11:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 22:11:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 22:11:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 22:11:11,206 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 22:11:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:11,206 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 22:11:11,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 22:11:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:11:11,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:11,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:11,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 22:11:11,226 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 22:11:11,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:11,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469659991] [2020-08-21 22:11:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:11,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469659991] [2020-08-21 22:11:11,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:11,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:11,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293346325] [2020-08-21 22:11:11,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:11,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:11,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:11,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:11,249 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 22:11:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:11,412 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 22:11:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:11,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:11:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:11,438 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 22:11:11,438 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 22:11:11,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 22:11:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 22:11:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 22:11:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 22:11:11,751 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 22:11:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:11,752 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 22:11:11,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 22:11:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:11:11,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:11,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:11,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 22:11:11,771 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 22:11:11,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:11,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160328898] [2020-08-21 22:11:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:11,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160328898] [2020-08-21 22:11:11,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:11,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:11,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056872927] [2020-08-21 22:11:11,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:11,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:11,802 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 22:11:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:12,421 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 22:11:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:12,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:11:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:12,465 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 22:11:12,465 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 22:11:12,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 22:11:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 22:11:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 22:11:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 22:11:12,908 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 22:11:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:12,908 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 22:11:12,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 22:11:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:11:12,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:12,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:12,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 22:11:12,945 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 22:11:12,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:12,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205659847] [2020-08-21 22:11:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:12,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205659847] [2020-08-21 22:11:12,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:12,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:12,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180510690] [2020-08-21 22:11:12,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:12,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:12,966 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 22:11:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:13,336 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 22:11:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:13,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:11:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:13,337 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 22:11:13,338 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:11:13,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:11:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:11:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:11:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:11:13,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 22:11:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:13,435 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:11:13,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:11:13,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:11:13,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 22:11:13,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:11:13,469 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:11:13,469 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:11:13,469 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:11:13,470 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:11:13,470 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:11:13,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:11:13,470 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 22:11:13,470 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 22:11:13,470 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,471 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,472 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,472 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 22:11:13,472 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 22:11:13,472 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 22:11:13,472 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 22:11:13,472 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 22:11:13,473 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 22:11:13,473 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 22:11:13,473 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,473 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,473 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 22:11:13,474 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 22:11:13,474 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,474 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,474 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,474 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,474 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,475 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 22:11:13,475 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,475 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 22:11:13,475 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,475 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 22:11:13,476 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 22:11:13,476 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,476 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 22:11:13,476 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 22:11:13,476 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 22:11:13,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:11:13 BoogieIcfgContainer [2020-08-21 22:11:13,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:11:13,497 INFO L168 Benchmark]: Toolchain (without parser) took 9085.87 ms. Allocated memory was 148.4 MB in the beginning and 602.4 MB in the end (delta: 454.0 MB). Free memory was 104.5 MB in the beginning and 277.7 MB in the end (delta: -173.2 MB). Peak memory consumption was 280.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:13,498 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:11:13,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.78 ms. Allocated memory is still 148.4 MB. Free memory was 104.3 MB in the beginning and 93.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:13,499 INFO L168 Benchmark]: Boogie Preprocessor took 154.29 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 181.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:13,499 INFO L168 Benchmark]: RCFGBuilder took 434.35 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 162.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:13,501 INFO L168 Benchmark]: TraceAbstraction took 8178.26 ms. Allocated memory was 204.5 MB in the beginning and 602.4 MB in the end (delta: 397.9 MB). Free memory was 161.9 MB in the beginning and 277.7 MB in the end (delta: -115.8 MB). Peak memory consumption was 282.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:13,508 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.78 ms. Allocated memory is still 148.4 MB. Free memory was 104.3 MB in the beginning and 93.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.29 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 181.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.35 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 162.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8178.26 ms. Allocated memory was 204.5 MB in the beginning and 602.4 MB in the end (delta: 397.9 MB). Free memory was 161.9 MB in the beginning and 277.7 MB in the end (delta: -115.8 MB). Peak memory consumption was 282.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.0s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...