/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:11,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:11,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:11,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:11,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:11,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:11,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:11,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:11,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:11,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:11,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:11,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:11,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:11,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:11,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:11,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:11,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:11,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:11,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:11,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:11,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:11,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:11,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:11,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:11,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:11,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:11,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:11,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:11,127 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 16:17:11,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:11,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:11,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:11,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:11,178 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:11,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:11,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:11,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:11,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:11,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:11,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:11,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:11,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:11,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:11,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:11,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:11,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:11,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:11,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:11,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:11,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:11,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:11,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:11,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:11,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:11,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:11,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:11,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:11,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:11,185 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 [2020-08-18 16:17:11,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:11,525 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:11,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:11,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:11,530 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:11,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 16:17:11,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22fff9447/ac30b075410b43539b88fef6adcea372/FLAGce8e4206d [2020-08-18 16:17:12,037 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:12,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 16:17:12,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22fff9447/ac30b075410b43539b88fef6adcea372/FLAGce8e4206d [2020-08-18 16:17:12,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22fff9447/ac30b075410b43539b88fef6adcea372 [2020-08-18 16:17:12,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:12,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:12,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:12,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:12,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:12,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:12,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12, skipping insertion in model container [2020-08-18 16:17:12,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:12,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:12,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:12,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:12,753 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:12,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:12,832 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:12,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12 WrapperNode [2020-08-18 16:17:12,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:12,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:12,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:12,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:12,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:12,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:13,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:13,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:13,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:13,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:13,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (1/1) ... [2020-08-18 16:17:13,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:13,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:13,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:13,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:13,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (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 16:17:13,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:13,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:13,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:13,471 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:13,471 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:17:13,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:13 BoogieIcfgContainer [2020-08-18 16:17:13,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:13,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:13,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:13,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:13,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:12" (1/3) ... [2020-08-18 16:17:13,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e408d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:13, skipping insertion in model container [2020-08-18 16:17:13,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:12" (2/3) ... [2020-08-18 16:17:13,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e408d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:13, skipping insertion in model container [2020-08-18 16:17:13,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:13" (3/3) ... [2020-08-18 16:17:13,484 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-18 16:17:13,494 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:13,501 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:13,515 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:13,539 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:13,539 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:13,540 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:13,540 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:13,540 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:13,540 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:13,541 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:13,541 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 16:17:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:17:13,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:13,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:13,567 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-18 16:17:13,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:13,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795624908] [2020-08-18 16:17:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:13,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:13,791 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 16:17:13,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795624908] [2020-08-18 16:17:13,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:13,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:13,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745535540] [2020-08-18 16:17:13,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:13,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:13,822 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-18 16:17:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:13,881 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-18 16:17:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:13,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 16:17:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:13,900 INFO L225 Difference]: With dead ends: 81 [2020-08-18 16:17:13,901 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 16:17:13,909 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 16:17:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 16:17:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-18 16:17:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 16:17:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-18 16:17:13,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-18 16:17:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:13,959 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-18 16:17:13,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-18 16:17:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:17:13,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:13,960 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 16:17:13,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:13,961 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-18 16:17:13,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:13,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371944816] [2020-08-18 16:17:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,021 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 16:17:14,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371944816] [2020-08-18 16:17:14,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429754484] [2020-08-18 16:17:14,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,026 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-18 16:17:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,057 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-18 16:17:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 16:17:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,060 INFO L225 Difference]: With dead ends: 107 [2020-08-18 16:17:14,060 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 16:17:14,062 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 16:17:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 16:17:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-18 16:17:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 16:17:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-18 16:17:14,073 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-18 16:17:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,074 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-18 16:17:14,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-18 16:17:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:14,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,076 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 16:17:14,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:14,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,077 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-18 16:17:14,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526881779] [2020-08-18 16:17:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,132 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 16:17:14,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526881779] [2020-08-18 16:17:14,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969712890] [2020-08-18 16:17:14,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,136 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-18 16:17:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,164 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-18 16:17:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 16:17:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,167 INFO L225 Difference]: With dead ends: 99 [2020-08-18 16:17:14,167 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 16:17:14,168 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 16:17:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 16:17:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-18 16:17:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 16:17:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-18 16:17:14,179 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-18 16:17:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,179 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-18 16:17:14,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-18 16:17:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:14,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,181 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 16:17:14,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:14,182 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,182 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-18 16:17:14,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201064132] [2020-08-18 16:17:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,267 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 16:17:14,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201064132] [2020-08-18 16:17:14,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257726735] [2020-08-18 16:17:14,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,269 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-18 16:17:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,291 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-18 16:17:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 16:17:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,294 INFO L225 Difference]: With dead ends: 124 [2020-08-18 16:17:14,294 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 16:17:14,295 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 16:17:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 16:17:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-18 16:17:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 16:17:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-18 16:17:14,308 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-18 16:17:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,309 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-18 16:17:14,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-18 16:17:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:14,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:14,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:14,311 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-18 16:17:14,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920114776] [2020-08-18 16:17:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,348 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 16:17:14,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920114776] [2020-08-18 16:17:14,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564531139] [2020-08-18 16:17:14,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,351 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-18 16:17:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,376 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-18 16:17:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 16:17:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,379 INFO L225 Difference]: With dead ends: 204 [2020-08-18 16:17:14,379 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 16:17:14,380 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 16:17:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 16:17:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-18 16:17:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 16:17:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-18 16:17:14,395 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-18 16:17:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,395 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-18 16:17:14,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-18 16:17:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:14,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,397 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 16:17:14,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:17:14,398 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-18 16:17:14,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800506115] [2020-08-18 16:17:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,464 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 16:17:14,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800506115] [2020-08-18 16:17:14,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994047189] [2020-08-18 16:17:14,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,470 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-18 16:17:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,506 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-18 16:17:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,509 INFO L225 Difference]: With dead ends: 183 [2020-08-18 16:17:14,509 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 16:17:14,510 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 16:17:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 16:17:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-18 16:17:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 16:17:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-18 16:17:14,524 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-18 16:17:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,524 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-18 16:17:14,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-18 16:17:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:14,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:14,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:17:14,530 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-18 16:17:14,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407788211] [2020-08-18 16:17:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,618 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 16:17:14,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407788211] [2020-08-18 16:17:14,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831508344] [2020-08-18 16:17:14,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,622 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-18 16:17:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,652 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-18 16:17:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,654 INFO L225 Difference]: With dead ends: 228 [2020-08-18 16:17:14,655 INFO L226 Difference]: Without dead ends: 226 [2020-08-18 16:17:14,656 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 16:17:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-18 16:17:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-18 16:17:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 16:17:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-18 16:17:14,688 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-18 16:17:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,688 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-18 16:17:14,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-18 16:17:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:14,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:14,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:17:14,694 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-18 16:17:14,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422164806] [2020-08-18 16:17:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,755 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 16:17:14,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422164806] [2020-08-18 16:17:14,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8636799] [2020-08-18 16:17:14,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,758 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-18 16:17:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,778 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-18 16:17:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,781 INFO L225 Difference]: With dead ends: 392 [2020-08-18 16:17:14,781 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 16:17:14,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 16:17:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-18 16:17:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 16:17:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-18 16:17:14,795 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-18 16:17:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,796 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-18 16:17:14,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-18 16:17:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:14,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,798 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 16:17:14,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:17:14,798 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-18 16:17:14,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789499179] [2020-08-18 16:17:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,825 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 16:17:14,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789499179] [2020-08-18 16:17:14,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43347883] [2020-08-18 16:17:14,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,828 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-18 16:17:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,846 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-18 16:17:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:17:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,848 INFO L225 Difference]: With dead ends: 348 [2020-08-18 16:17:14,849 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 16:17:14,850 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 16:17:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 16:17:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-18 16:17:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 16:17:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-18 16:17:14,861 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-18 16:17:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,861 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-18 16:17:14,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-18 16:17:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:14,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:14,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:17:14,864 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-18 16:17:14,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106393662] [2020-08-18 16:17:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,890 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 16:17:14,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106393662] [2020-08-18 16:17:14,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397527764] [2020-08-18 16:17:14,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,892 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-18 16:17:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,912 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-18 16:17:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:17:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,915 INFO L225 Difference]: With dead ends: 428 [2020-08-18 16:17:14,915 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 16:17:14,916 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 16:17:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 16:17:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-18 16:17:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 16:17:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-18 16:17:14,929 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-18 16:17:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:14,929 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-18 16:17:14,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-18 16:17:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:14,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,931 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 16:17:14,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:17:14,932 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-18 16:17:14,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995382750] [2020-08-18 16:17:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,955 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 16:17:14,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995382750] [2020-08-18 16:17:14,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877739349] [2020-08-18 16:17:14,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,957 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-18 16:17:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,981 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-18 16:17:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:17:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,985 INFO L225 Difference]: With dead ends: 764 [2020-08-18 16:17:14,985 INFO L226 Difference]: Without dead ends: 450 [2020-08-18 16:17:14,987 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 16:17:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-18 16:17:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-18 16:17:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-18 16:17:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-18 16:17:15,004 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-18 16:17:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,005 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-18 16:17:15,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-18 16:17:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:17:15,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,007 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 16:17:15,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 16:17:15,007 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-18 16:17:15,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929518142] [2020-08-18 16:17:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,037 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 16:17:15,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929518142] [2020-08-18 16:17:15,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515591028] [2020-08-18 16:17:15,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,040 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-18 16:17:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,071 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-18 16:17:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:17:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,075 INFO L225 Difference]: With dead ends: 672 [2020-08-18 16:17:15,075 INFO L226 Difference]: Without dead ends: 458 [2020-08-18 16:17:15,077 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 16:17:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-18 16:17:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-18 16:17:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 16:17:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-18 16:17:15,096 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-18 16:17:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,097 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-18 16:17:15,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-18 16:17:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:17:15,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,101 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 16:17:15,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 16:17:15,101 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-18 16:17:15,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923415347] [2020-08-18 16:17:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,144 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 16:17:15,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923415347] [2020-08-18 16:17:15,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171456478] [2020-08-18 16:17:15,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,149 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-18 16:17:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,175 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-18 16:17:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:17:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,181 INFO L225 Difference]: With dead ends: 812 [2020-08-18 16:17:15,182 INFO L226 Difference]: Without dead ends: 810 [2020-08-18 16:17:15,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-18 16:17:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-18 16:17:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-18 16:17:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-18 16:17:15,204 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-18 16:17:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,205 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-18 16:17:15,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-18 16:17:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:17:15,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:15,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 16:17:15,207 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-18 16:17:15,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485858939] [2020-08-18 16:17:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,264 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 16:17:15,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485858939] [2020-08-18 16:17:15,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152481455] [2020-08-18 16:17:15,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,267 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-18 16:17:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,299 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-18 16:17:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:17:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,307 INFO L225 Difference]: With dead ends: 1500 [2020-08-18 16:17:15,307 INFO L226 Difference]: Without dead ends: 874 [2020-08-18 16:17:15,309 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 16:17:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-18 16:17:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-18 16:17:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 16:17:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-18 16:17:15,350 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-18 16:17:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,351 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-18 16:17:15,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-18 16:17:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:17:15,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:15,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 16:17:15,354 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-18 16:17:15,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614600937] [2020-08-18 16:17:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,384 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 16:17:15,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614600937] [2020-08-18 16:17:15,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827253698] [2020-08-18 16:17:15,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,387 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-18 16:17:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,423 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-18 16:17:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:17:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,429 INFO L225 Difference]: With dead ends: 1308 [2020-08-18 16:17:15,429 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 16:17:15,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 16:17:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-18 16:17:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-18 16:17:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-18 16:17:15,492 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-18 16:17:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,493 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-18 16:17:15,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-18 16:17:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:17:15,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:15,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 16:17:15,496 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-18 16:17:15,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915538822] [2020-08-18 16:17:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,527 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 16:17:15,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915538822] [2020-08-18 16:17:15,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641717512] [2020-08-18 16:17:15,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,534 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-18 16:17:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,571 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-18 16:17:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:17:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,580 INFO L225 Difference]: With dead ends: 1548 [2020-08-18 16:17:15,580 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 16:17:15,581 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 16:17:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 16:17:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-18 16:17:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-18 16:17:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-18 16:17:15,630 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-18 16:17:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,631 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-18 16:17:15,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-18 16:17:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:17:15,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:15,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 16:17:15,635 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-18 16:17:15,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444363533] [2020-08-18 16:17:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,666 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 16:17:15,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444363533] [2020-08-18 16:17:15,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323663915] [2020-08-18 16:17:15,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,669 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-18 16:17:15,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,718 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-18 16:17:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:17:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,728 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 16:17:15,728 INFO L226 Difference]: Without dead ends: 1706 [2020-08-18 16:17:15,731 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 16:17:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-18 16:17:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-18 16:17:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-18 16:17:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-18 16:17:15,789 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-18 16:17:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,789 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-18 16:17:15,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-18 16:17:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:17:15,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:15,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 16:17:15,793 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-18 16:17:15,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505806760] [2020-08-18 16:17:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,834 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 16:17:15,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505806760] [2020-08-18 16:17:15,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208033788] [2020-08-18 16:17:15,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,840 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-18 16:17:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,903 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-18 16:17:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 16:17:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,916 INFO L225 Difference]: With dead ends: 2556 [2020-08-18 16:17:15,916 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 16:17:15,920 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 16:17:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 16:17:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-18 16:17:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-18 16:17:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-18 16:17:15,996 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-18 16:17:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,996 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-18 16:17:15,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-18 16:17:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:17:16,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:16,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:16,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 16:17:16,001 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-18 16:17:16,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:16,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481044445] [2020-08-18 16:17:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,032 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 16:17:16,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481044445] [2020-08-18 16:17:16,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:16,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:16,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043975880] [2020-08-18 16:17:16,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:16,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:16,037 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-18 16:17:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:16,109 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-18 16:17:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:16,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 16:17:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:16,141 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 16:17:16,141 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 16:17:16,142 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 16:17:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 16:17:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-18 16:17:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-18 16:17:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-18 16:17:16,232 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-18 16:17:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:16,232 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-18 16:17:16,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-18 16:17:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:17:16,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:16,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:16,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 16:17:16,238 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-18 16:17:16,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:16,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811624635] [2020-08-18 16:17:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,266 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 16:17:16,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811624635] [2020-08-18 16:17:16,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:16,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:16,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38973236] [2020-08-18 16:17:16,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:16,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:16,268 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-18 16:17:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:16,356 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-18 16:17:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:16,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 16:17:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:16,374 INFO L225 Difference]: With dead ends: 5836 [2020-08-18 16:17:16,374 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 16:17:16,379 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 16:17:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 16:17:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-18 16:17:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-18 16:17:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-18 16:17:16,487 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-18 16:17:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:16,487 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-18 16:17:16,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-18 16:17:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:17:16,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:16,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:16,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 16:17:16,495 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-18 16:17:16,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:16,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416613226] [2020-08-18 16:17:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,520 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 16:17:16,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416613226] [2020-08-18 16:17:16,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:16,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:16,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583696876] [2020-08-18 16:17:16,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:16,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:16,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:16,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:16,527 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-18 16:17:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:16,590 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-18 16:17:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:16,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 16:17:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:16,608 INFO L225 Difference]: With dead ends: 5004 [2020-08-18 16:17:16,608 INFO L226 Difference]: Without dead ends: 3402 [2020-08-18 16:17:16,612 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 16:17:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-18 16:17:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-18 16:17:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-18 16:17:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-18 16:17:16,736 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-18 16:17:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:16,737 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-18 16:17:16,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-18 16:17:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:17:16,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:16,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:16,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 16:17:16,743 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-18 16:17:16,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:16,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807262475] [2020-08-18 16:17:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,770 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 16:17:16,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807262475] [2020-08-18 16:17:16,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:16,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:16,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256594758] [2020-08-18 16:17:16,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:16,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:16,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:16,773 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-18 16:17:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:16,880 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-18 16:17:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:16,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 16:17:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:16,911 INFO L225 Difference]: With dead ends: 9804 [2020-08-18 16:17:16,911 INFO L226 Difference]: Without dead ends: 6538 [2020-08-18 16:17:16,919 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 16:17:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-18 16:17:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-18 16:17:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 16:17:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-18 16:17:17,132 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-18 16:17:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:17,132 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-18 16:17:17,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-18 16:17:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:17:17,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:17,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:17,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 16:17:17,143 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-18 16:17:17,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:17,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003001048] [2020-08-18 16:17:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,198 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 16:17:17,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003001048] [2020-08-18 16:17:17,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:17,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:17,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095873743] [2020-08-18 16:17:17,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:17,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:17,200 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-18 16:17:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:17,318 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-18 16:17:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:17,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 16:17:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:17,333 INFO L225 Difference]: With dead ends: 7052 [2020-08-18 16:17:17,333 INFO L226 Difference]: Without dead ends: 7050 [2020-08-18 16:17:17,336 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 16:17:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-18 16:17:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-18 16:17:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 16:17:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-18 16:17:17,507 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-18 16:17:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:17,508 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-18 16:17:17,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-18 16:17:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:17:17,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:17,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:17,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 16:17:17,518 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-18 16:17:17,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:17,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961838933] [2020-08-18 16:17:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,540 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 16:17:17,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961838933] [2020-08-18 16:17:17,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:17,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:17,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732754487] [2020-08-18 16:17:17,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:17,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:17,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:17,543 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-18 16:17:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:17,770 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-18 16:17:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:17,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 16:17:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:17,792 INFO L225 Difference]: With dead ends: 10634 [2020-08-18 16:17:17,792 INFO L226 Difference]: Without dead ends: 10632 [2020-08-18 16:17:17,795 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 16:17:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-18 16:17:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-18 16:17:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-18 16:17:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-18 16:17:18,019 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-18 16:17:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:18,019 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-18 16:17:18,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-18 16:17:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:17:18,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:18,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:18,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 16:17:18,036 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:18,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-18 16:17:18,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:18,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190622664] [2020-08-18 16:17:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:18,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:18,058 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 16:17:18,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190622664] [2020-08-18 16:17:18,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:18,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:18,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390868594] [2020-08-18 16:17:18,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:18,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:18,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:18,060 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-18 16:17:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:18,318 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-18 16:17:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:18,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 16:17:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:18,319 INFO L225 Difference]: With dead ends: 22664 [2020-08-18 16:17:18,319 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:17:18,355 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 16:17:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:17:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:17:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:17:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:17:18,356 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-18 16:17:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:18,357 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:17:18,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:17:18,357 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:17:18,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 16:17:18,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:17:18,395 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 16:17:18,395 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:17:18,396 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-18 16:17:18,396 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,397 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-18 16:17:18,397 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,397 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-18 16:17:18,397 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,398 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,398 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-18 16:17:18,398 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-18 16:17:18,398 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-18 16:17:18,399 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-18 16:17:18,400 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-18 16:17:18,400 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,401 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,401 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 16:17:18,401 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-18 16:17:18,401 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,401 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 16:17:18,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:18 BoogieIcfgContainer [2020-08-18 16:17:18,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:18,425 INFO L168 Benchmark]: Toolchain (without parser) took 5946.76 ms. Allocated memory was 140.5 MB in the beginning and 319.3 MB in the end (delta: 178.8 MB). Free memory was 103.2 MB in the beginning and 239.3 MB in the end (delta: -136.1 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,425 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:18,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.61 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,426 INFO L168 Benchmark]: Boogie Preprocessor took 205.38 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 92.5 MB in the beginning and 183.5 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,429 INFO L168 Benchmark]: RCFGBuilder took 436.21 ms. Allocated memory is still 206.6 MB. Free memory was 183.5 MB in the beginning and 165.3 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,435 INFO L168 Benchmark]: TraceAbstraction took 4944.78 ms. Allocated memory was 206.6 MB in the beginning and 319.3 MB in the end (delta: 112.7 MB). Free memory was 164.7 MB in the beginning and 239.3 MB in the end (delta: -74.7 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,438 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 355.61 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 205.38 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 92.5 MB in the beginning and 183.5 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 436.21 ms. Allocated memory is still 206.6 MB. Free memory was 183.5 MB in the beginning and 165.3 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4944.78 ms. Allocated memory was 206.6 MB in the beginning and 319.3 MB in the end (delta: 112.7 MB). Free memory was 164.7 MB in the beginning and 239.3 MB in the end (delta: -74.7 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...