/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:43:48,207 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 22:43:48,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:43:48,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:43:48,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:43:48,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:43:48,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:43:48,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:43:48,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:43:48,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:43:48,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:43:48,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:43:48,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:43:48,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:43:48,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:43:48,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:43:48,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:43:48,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:43:48,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:43:48,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:43:48,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:43:48,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:43:48,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:43:48,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:48,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:48,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:48,284 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 [2020-08-18 22:43:48,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:48,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:48,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:48,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:48,329 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:48,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:48,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:48,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:48,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:48,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:48,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:48,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:48,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:48,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:48,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:48,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:48,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:48,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:48,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:48,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:48,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:48,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:48,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:48,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:48,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:48,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:48,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:48,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:48,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:48,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:43:48,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:43:48,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:43:48,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:43:48,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:43:48,672 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:43:48,673 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 22:43:48,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78562113/12f22a5ecfa44378a71b1b528e9791b0/FLAG417d28d71 [2020-08-18 22:43:49,173 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:43:49,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 22:43:49,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78562113/12f22a5ecfa44378a71b1b528e9791b0/FLAG417d28d71 [2020-08-18 22:43:49,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e78562113/12f22a5ecfa44378a71b1b528e9791b0 [2020-08-18 22:43:49,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:43:49,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:43:49,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:49,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:43:49,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:43:49,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49, skipping insertion in model container [2020-08-18 22:43:49,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:43:49,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:43:49,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:49,797 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:43:49,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:49,836 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:43:49,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49 WrapperNode [2020-08-18 22:43:49,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:49,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:43:49,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:43:49,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:43:49,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (1/1) ... [2020-08-18 22:43:49,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:43:49,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:43:49,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:43:49,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:43:49,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (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 [2020-08-18 22:43:50,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:43:50,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:43:50,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:43:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:43:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:43:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:43:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:43:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:43:50,361 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:43:50,362 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:43:50,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:50 BoogieIcfgContainer [2020-08-18 22:43:50,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:43:50,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:43:50,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:43:50,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:43:50,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:49" (1/3) ... [2020-08-18 22:43:50,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b11d032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:50, skipping insertion in model container [2020-08-18 22:43:50,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:49" (2/3) ... [2020-08-18 22:43:50,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b11d032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:50, skipping insertion in model container [2020-08-18 22:43:50,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:50" (3/3) ... [2020-08-18 22:43:50,374 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-18 22:43:50,386 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:43:50,393 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:43:50,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:43:50,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:43:50,437 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:43:50,437 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:43:50,437 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:43:50,437 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:43:50,437 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:43:50,437 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:43:50,438 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:43:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 22:43:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 22:43:50,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:50,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:50,475 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-18 22:43:50,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:50,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243192716] [2020-08-18 22:43:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:50,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243192716] [2020-08-18 22:43:50,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:50,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:50,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049446508] [2020-08-18 22:43:50,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:50,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:50,701 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 22:43:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:50,783 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-18 22:43:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:50,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 22:43:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:50,798 INFO L225 Difference]: With dead ends: 69 [2020-08-18 22:43:50,799 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:43:50,803 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 [2020-08-18 22:43:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:43:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-18 22:43:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 22:43:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-18 22:43:50,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-18 22:43:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:50,845 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-18 22:43:50,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-18 22:43:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 22:43:50,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:50,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:50,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:43:50,847 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-18 22:43:50,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:50,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369782893] [2020-08-18 22:43:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:50,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369782893] [2020-08-18 22:43:50,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:50,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:50,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358166316] [2020-08-18 22:43:50,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:50,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:50,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:50,924 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-18 22:43:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:50,989 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-18 22:43:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:50,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 22:43:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:50,993 INFO L225 Difference]: With dead ends: 87 [2020-08-18 22:43:50,993 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:43:50,996 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 [2020-08-18 22:43:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:43:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-18 22:43:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 22:43:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-18 22:43:51,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-18 22:43:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,010 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-18 22:43:51,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-18 22:43:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:43:51,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:43:51,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-18 22:43:51,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865686313] [2020-08-18 22:43:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865686313] [2020-08-18 22:43:51,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114041569] [2020-08-18 22:43:51,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,081 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-18 22:43:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,120 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-18 22:43:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 22:43:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,122 INFO L225 Difference]: With dead ends: 81 [2020-08-18 22:43:51,122 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 22:43:51,123 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 [2020-08-18 22:43:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 22:43:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-18 22:43:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 22:43:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-18 22:43:51,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-18 22:43:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,133 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-18 22:43:51,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-18 22:43:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:43:51,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:43:51,136 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-18 22:43:51,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378194342] [2020-08-18 22:43:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378194342] [2020-08-18 22:43:51,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504528890] [2020-08-18 22:43:51,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,211 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-18 22:43:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,233 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-18 22:43:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 22:43:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,236 INFO L225 Difference]: With dead ends: 100 [2020-08-18 22:43:51,236 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 22:43:51,237 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 [2020-08-18 22:43:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 22:43:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-18 22:43:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 22:43:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-18 22:43:51,249 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-18 22:43:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,250 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-18 22:43:51,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-18 22:43:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:43:51,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:43:51,252 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-18 22:43:51,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871389361] [2020-08-18 22:43:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871389361] [2020-08-18 22:43:51,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159966041] [2020-08-18 22:43:51,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,293 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-18 22:43:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,330 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-18 22:43:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 22:43:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,332 INFO L225 Difference]: With dead ends: 164 [2020-08-18 22:43:51,332 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 22:43:51,334 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 [2020-08-18 22:43:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 22:43:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-18 22:43:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 22:43:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-18 22:43:51,356 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-18 22:43:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,358 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-18 22:43:51,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-18 22:43:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:51,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:43:51,361 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-18 22:43:51,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119557712] [2020-08-18 22:43:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119557712] [2020-08-18 22:43:51,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678041029] [2020-08-18 22:43:51,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,437 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-18 22:43:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,459 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-18 22:43:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 22:43:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,461 INFO L225 Difference]: With dead ends: 147 [2020-08-18 22:43:51,462 INFO L226 Difference]: Without dead ends: 102 [2020-08-18 22:43:51,462 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 [2020-08-18 22:43:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-18 22:43:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-18 22:43:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 22:43:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-18 22:43:51,473 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-18 22:43:51,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,473 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-18 22:43:51,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-18 22:43:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:51,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:43:51,476 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-18 22:43:51,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951620988] [2020-08-18 22:43:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951620988] [2020-08-18 22:43:51,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569517981] [2020-08-18 22:43:51,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,511 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-18 22:43:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,540 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-18 22:43:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 22:43:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,542 INFO L225 Difference]: With dead ends: 180 [2020-08-18 22:43:51,542 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 22:43:51,543 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 [2020-08-18 22:43:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 22:43:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-18 22:43:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 22:43:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-18 22:43:51,556 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-18 22:43:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,556 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-18 22:43:51,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-18 22:43:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:51,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:43:51,559 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-18 22:43:51,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125140413] [2020-08-18 22:43:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125140413] [2020-08-18 22:43:51,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904092184] [2020-08-18 22:43:51,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,614 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-18 22:43:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,633 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 22:43:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 22:43:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,635 INFO L225 Difference]: With dead ends: 312 [2020-08-18 22:43:51,635 INFO L226 Difference]: Without dead ends: 186 [2020-08-18 22:43:51,637 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 [2020-08-18 22:43:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-18 22:43:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-18 22:43:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 22:43:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-18 22:43:51,650 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-18 22:43:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,650 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-18 22:43:51,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-18 22:43:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:51,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,652 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] [2020-08-18 22:43:51,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:43:51,652 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-18 22:43:51,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567088979] [2020-08-18 22:43:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567088979] [2020-08-18 22:43:51,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235049733] [2020-08-18 22:43:51,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,688 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-18 22:43:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,711 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-18 22:43:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,713 INFO L225 Difference]: With dead ends: 276 [2020-08-18 22:43:51,713 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 22:43:51,714 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 [2020-08-18 22:43:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 22:43:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-18 22:43:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 22:43:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-18 22:43:51,726 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-18 22:43:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,727 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-18 22:43:51,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-18 22:43:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:51,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,728 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] [2020-08-18 22:43:51,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:43:51,729 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-18 22:43:51,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831508344] [2020-08-18 22:43:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831508344] [2020-08-18 22:43:51,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591071083] [2020-08-18 22:43:51,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,759 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-18 22:43:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,782 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-18 22:43:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,785 INFO L225 Difference]: With dead ends: 332 [2020-08-18 22:43:51,785 INFO L226 Difference]: Without dead ends: 330 [2020-08-18 22:43:51,786 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 [2020-08-18 22:43:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-18 22:43:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-18 22:43:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 22:43:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-18 22:43:51,799 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-18 22:43:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,799 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-18 22:43:51,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-18 22:43:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:51,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,802 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] [2020-08-18 22:43:51,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:43:51,802 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-18 22:43:51,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851799270] [2020-08-18 22:43:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851799270] [2020-08-18 22:43:51,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048332660] [2020-08-18 22:43:51,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,831 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-18 22:43:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,854 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-18 22:43:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,857 INFO L225 Difference]: With dead ends: 604 [2020-08-18 22:43:51,857 INFO L226 Difference]: Without dead ends: 354 [2020-08-18 22:43:51,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-18 22:43:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-18 22:43:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-18 22:43:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-18 22:43:51,874 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-18 22:43:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,875 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-18 22:43:51,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-18 22:43:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:51,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:43:51,878 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-18 22:43:51,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388815103] [2020-08-18 22:43:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:51,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388815103] [2020-08-18 22:43:51,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:51,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56941161] [2020-08-18 22:43:51,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:51,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:51,915 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-18 22:43:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,940 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-18 22:43:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:51,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,944 INFO L225 Difference]: With dead ends: 528 [2020-08-18 22:43:51,944 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 22:43:51,945 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 [2020-08-18 22:43:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 22:43:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-18 22:43:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 22:43:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-18 22:43:51,963 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-18 22:43:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,963 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-18 22:43:51,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-18 22:43:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:51,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:43:51,971 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-18 22:43:51,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889591063] [2020-08-18 22:43:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889591063] [2020-08-18 22:43:52,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674377719] [2020-08-18 22:43:52,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,020 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-18 22:43:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,048 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-18 22:43:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,053 INFO L225 Difference]: With dead ends: 620 [2020-08-18 22:43:52,053 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 22:43:52,053 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 [2020-08-18 22:43:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 22:43:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-18 22:43:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-18 22:43:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-18 22:43:52,075 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-18 22:43:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,076 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-18 22:43:52,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-18 22:43:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:52,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,079 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] [2020-08-18 22:43:52,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:43:52,079 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-18 22:43:52,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575633160] [2020-08-18 22:43:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575633160] [2020-08-18 22:43:52,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616519395] [2020-08-18 22:43:52,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,136 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-18 22:43:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,170 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-18 22:43:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,175 INFO L225 Difference]: With dead ends: 1180 [2020-08-18 22:43:52,175 INFO L226 Difference]: Without dead ends: 682 [2020-08-18 22:43:52,177 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 [2020-08-18 22:43:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-18 22:43:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-18 22:43:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-18 22:43:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-18 22:43:52,202 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-18 22:43:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,204 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-18 22:43:52,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-18 22:43:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:52,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:43:52,207 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-18 22:43:52,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156916504] [2020-08-18 22:43:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156916504] [2020-08-18 22:43:52,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385695224] [2020-08-18 22:43:52,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,249 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-18 22:43:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,278 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-18 22:43:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,285 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 22:43:52,286 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 22:43:52,289 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 [2020-08-18 22:43:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 22:43:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-18 22:43:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-18 22:43:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-18 22:43:52,317 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-18 22:43:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,318 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-18 22:43:52,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-18 22:43:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:52,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:43:52,320 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-18 22:43:52,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744270386] [2020-08-18 22:43:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744270386] [2020-08-18 22:43:52,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623240658] [2020-08-18 22:43:52,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,371 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-18 22:43:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,412 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-18 22:43:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,420 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 22:43:52,421 INFO L226 Difference]: Without dead ends: 1162 [2020-08-18 22:43:52,422 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 [2020-08-18 22:43:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-18 22:43:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-18 22:43:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-18 22:43:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-18 22:43:52,480 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-18 22:43:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,480 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-18 22:43:52,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-18 22:43:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:52,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,483 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] [2020-08-18 22:43:52,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:43:52,483 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-18 22:43:52,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893062191] [2020-08-18 22:43:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893062191] [2020-08-18 22:43:52,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445690521] [2020-08-18 22:43:52,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,508 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-18 22:43:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,549 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-18 22:43:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,556 INFO L225 Difference]: With dead ends: 2316 [2020-08-18 22:43:52,557 INFO L226 Difference]: Without dead ends: 1322 [2020-08-18 22:43:52,559 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 [2020-08-18 22:43:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-18 22:43:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-18 22:43:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-18 22:43:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-18 22:43:52,604 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-18 22:43:52,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,605 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-18 22:43:52,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-18 22:43:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:52,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,607 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] [2020-08-18 22:43:52,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:43:52,608 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,608 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-18 22:43:52,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848720581] [2020-08-18 22:43:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848720581] [2020-08-18 22:43:52,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356590250] [2020-08-18 22:43:52,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,628 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-18 22:43:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,663 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-18 22:43:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,669 INFO L225 Difference]: With dead ends: 1980 [2020-08-18 22:43:52,669 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 22:43:52,671 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 [2020-08-18 22:43:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 22:43:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-18 22:43:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-18 22:43:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-18 22:43:52,714 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-18 22:43:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,715 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-18 22:43:52,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-18 22:43:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:52,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,719 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] [2020-08-18 22:43:52,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:43:52,719 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-18 22:43:52,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309684832] [2020-08-18 22:43:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309684832] [2020-08-18 22:43:52,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597030881] [2020-08-18 22:43:52,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,746 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-18 22:43:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,797 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-18 22:43:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,806 INFO L225 Difference]: With dead ends: 2186 [2020-08-18 22:43:52,806 INFO L226 Difference]: Without dead ends: 2184 [2020-08-18 22:43:52,807 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 [2020-08-18 22:43:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-18 22:43:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-18 22:43:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-18 22:43:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-18 22:43:52,867 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-18 22:43:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,867 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-18 22:43:52,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-18 22:43:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:52,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,871 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] [2020-08-18 22:43:52,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:43:52,872 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-18 22:43:52,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885765588] [2020-08-18 22:43:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885765588] [2020-08-18 22:43:52,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569484965] [2020-08-18 22:43:52,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,899 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-18 22:43:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,966 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-18 22:43:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,967 INFO L225 Difference]: With dead ends: 4552 [2020-08-18 22:43:52,968 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:43:52,975 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 [2020-08-18 22:43:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:43:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:43:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:43:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:43:52,976 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-18 22:43:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,977 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:43:52,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:43:52,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:43:52,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:43:52,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:43:53,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:43:53,018 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:53,018 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:53,018 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:43:53,019 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:43:53,019 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:43:53,019 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-18 22:43:53,019 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-18 22:43:53,019 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,019 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-18 22:43:53,019 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-18 22:43:53,020 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-18 22:43:53,020 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-18 22:43:53,020 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-18 22:43:53,020 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,020 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-18 22:43:53,020 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,020 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,021 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-18 22:43:53,021 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,021 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 22:43:53,021 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,021 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,021 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-18 22:43:53,021 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,023 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-18 22:43:53,024 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-18 22:43:53,024 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,024 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 22:43:53,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:53 BoogieIcfgContainer [2020-08-18 22:43:53,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:53,048 INFO L168 Benchmark]: Toolchain (without parser) took 3476.66 ms. Allocated memory was 140.5 MB in the beginning and 246.4 MB in the end (delta: 105.9 MB). Free memory was 103.8 MB in the beginning and 214.4 MB in the end (delta: -110.6 MB). Peak memory consumption was 115.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:53,054 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 22:43:53,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.87 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:53,058 INFO L168 Benchmark]: Boogie Preprocessor took 130.12 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.2 MB in the beginning and 180.9 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:53,059 INFO L168 Benchmark]: RCFGBuilder took 395.40 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 163.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:53,061 INFO L168 Benchmark]: TraceAbstraction took 2675.31 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 163.8 MB in the beginning and 214.4 MB in the end (delta: -50.6 MB). Peak memory consumption was 112.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:53,066 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.87 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.12 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.2 MB in the beginning and 180.9 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.40 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 163.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2675.31 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 163.8 MB in the beginning and 214.4 MB in the end (delta: -50.6 MB). Peak memory consumption was 112.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...