/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_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:08,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:08,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:08,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:08,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:08,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:08,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:08,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:08,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:08,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:08,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:08,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:08,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:08,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:08,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:08,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:08,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:08,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:08,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:08,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:08,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:08,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:08,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:08,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:08,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:08,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:08,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:08,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:08,228 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 16:17:08,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:08,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:08,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:08,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:08,252 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:08,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:08,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:08,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:08,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:08,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:08,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:08,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:08,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:08,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:08,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:08,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:08,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:08,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:08,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:08,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:08,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:08,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:08,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:08,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:08,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:08,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:08,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:08,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:08,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:08,257 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 16:17:08,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:08,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:08,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:08,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:08,555 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:08,555 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-18 16:17:08,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332056b47/7f5caa014f9e4f409983d0895082f127/FLAG682791c88 [2020-08-18 16:17:09,103 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:09,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-18 16:17:09,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332056b47/7f5caa014f9e4f409983d0895082f127/FLAG682791c88 [2020-08-18 16:17:09,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332056b47/7f5caa014f9e4f409983d0895082f127 [2020-08-18 16:17:09,458 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:09,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:09,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:09,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:09,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:09,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3666d953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09, skipping insertion in model container [2020-08-18 16:17:09,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:09,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:09,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:09,697 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:09,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:09,729 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:09,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09 WrapperNode [2020-08-18 16:17:09,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:09,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:09,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:09,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:09,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (1/1) ... [2020-08-18 16:17:09,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:09,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:09,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:09,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:09,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (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 16:17:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:10,160 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:10,160 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:17:10,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:10 BoogieIcfgContainer [2020-08-18 16:17:10,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:10,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:10,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:10,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:10,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:09" (1/3) ... [2020-08-18 16:17:10,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45289992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:10, skipping insertion in model container [2020-08-18 16:17:10,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:09" (2/3) ... [2020-08-18 16:17:10,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45289992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:10, skipping insertion in model container [2020-08-18 16:17:10,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:10" (3/3) ... [2020-08-18 16:17:10,173 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-18 16:17:10,186 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:10,193 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:10,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:10,241 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:10,241 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:10,242 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:10,242 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:10,242 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:10,243 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:10,243 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:10,243 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-18 16:17:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 16:17:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,280 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-18 16:17:10,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175324085] [2020-08-18 16:17:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,524 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 16:17:10,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175324085] [2020-08-18 16:17:10,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023828594] [2020-08-18 16:17:10,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,556 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-18 16:17:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,604 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-18 16:17:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 16:17:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,618 INFO L225 Difference]: With dead ends: 63 [2020-08-18 16:17:10,618 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 16:17:10,622 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 16:17:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 16:17:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-18 16:17:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 16:17:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-18 16:17:10,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-18 16:17:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:10,670 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-18 16:17:10,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-18 16:17:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 16:17:10,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:10,672 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-18 16:17:10,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594726837] [2020-08-18 16:17:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:10,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594726837] [2020-08-18 16:17:10,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150151906] [2020-08-18 16:17:10,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,742 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-18 16:17:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,768 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-18 16:17:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 16:17:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,770 INFO L225 Difference]: With dead ends: 77 [2020-08-18 16:17:10,771 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 16:17:10,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 16:17:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-18 16:17:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 16:17:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-18 16:17:10,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-18 16:17:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:10,782 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-18 16:17:10,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-18 16:17:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 16:17:10,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:10,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-18 16:17:10,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478851561] [2020-08-18 16:17:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,849 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 16:17:10,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478851561] [2020-08-18 16:17:10,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971049095] [2020-08-18 16:17:10,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,852 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-18 16:17:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,876 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-18 16:17:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 16:17:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,878 INFO L225 Difference]: With dead ends: 72 [2020-08-18 16:17:10,879 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 16:17:10,879 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 16:17:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 16:17:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-18 16:17:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 16:17:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-18 16:17:10,889 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-18 16:17:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:10,889 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-18 16:17:10,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-18 16:17:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 16:17:10,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:10,892 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-18 16:17:10,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409182158] [2020-08-18 16:17:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,931 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 16:17:10,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409182158] [2020-08-18 16:17:10,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086522791] [2020-08-18 16:17:10,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,934 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-18 16:17:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,964 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-18 16:17:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 16:17:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,966 INFO L225 Difference]: With dead ends: 88 [2020-08-18 16:17:10,967 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 16:17:10,968 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 16:17:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 16:17:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-18 16:17:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 16:17:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-18 16:17:10,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-18 16:17:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:10,979 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-18 16:17:10,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-18 16:17:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 16:17:10,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:10,981 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-18 16:17:10,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272256039] [2020-08-18 16:17:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:11,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272256039] [2020-08-18 16:17:11,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47683652] [2020-08-18 16:17:11,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,019 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-18 16:17:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,042 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-18 16:17:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 16:17:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,044 INFO L225 Difference]: With dead ends: 144 [2020-08-18 16:17:11,044 INFO L226 Difference]: Without dead ends: 88 [2020-08-18 16:17:11,045 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 16:17:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-18 16:17:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-18 16:17:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-18 16:17:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-18 16:17:11,064 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-18 16:17:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,064 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-18 16:17:11,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-18 16:17:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:17:11,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:11,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:17:11,067 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-18 16:17:11,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648529908] [2020-08-18 16:17:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,137 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 16:17:11,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648529908] [2020-08-18 16:17:11,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721800997] [2020-08-18 16:17:11,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,145 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-18 16:17:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,178 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-18 16:17:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 16:17:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,180 INFO L225 Difference]: With dead ends: 129 [2020-08-18 16:17:11,180 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 16:17:11,181 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 16:17:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 16:17:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-18 16:17:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 16:17:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-18 16:17:11,192 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-18 16:17:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,193 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-18 16:17:11,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-18 16:17:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:17:11,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:11,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:17:11,195 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-18 16:17:11,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320129116] [2020-08-18 16:17:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:11,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320129116] [2020-08-18 16:17:11,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988898908] [2020-08-18 16:17:11,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,232 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-18 16:17:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,262 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-18 16:17:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 16:17:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,264 INFO L225 Difference]: With dead ends: 156 [2020-08-18 16:17:11,264 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 16:17:11,265 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 16:17:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 16:17:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-18 16:17:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 16:17:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-18 16:17:11,280 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-18 16:17:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,280 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-18 16:17:11,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-18 16:17:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:17:11,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:11,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:17:11,283 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-18 16:17:11,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217189860] [2020-08-18 16:17:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,315 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 16:17:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217189860] [2020-08-18 16:17:11,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671212365] [2020-08-18 16:17:11,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,318 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-18 16:17:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,353 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-18 16:17:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 16:17:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,355 INFO L225 Difference]: With dead ends: 272 [2020-08-18 16:17:11,355 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 16:17:11,356 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 16:17:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 16:17:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-18 16:17:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 16:17:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-18 16:17:11,370 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-18 16:17:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,370 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-18 16:17:11,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-18 16:17:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:17:11,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,372 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 16:17:11,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:17:11,373 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-18 16:17:11,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947770434] [2020-08-18 16:17:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,396 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 16:17:11,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947770434] [2020-08-18 16:17:11,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337972119] [2020-08-18 16:17:11,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,399 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-18 16:17:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,416 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-18 16:17:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 16:17:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,418 INFO L225 Difference]: With dead ends: 240 [2020-08-18 16:17:11,418 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 16:17:11,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 16:17:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-18 16:17:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-18 16:17:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-18 16:17:11,441 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-18 16:17:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,441 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-18 16:17:11,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-18 16:17:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:17:11,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,443 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 16:17:11,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:17:11,447 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-18 16:17:11,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171765664] [2020-08-18 16:17:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,504 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 16:17:11,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171765664] [2020-08-18 16:17:11,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356721680] [2020-08-18 16:17:11,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,507 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-18 16:17:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,548 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-18 16:17:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 16:17:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,553 INFO L225 Difference]: With dead ends: 284 [2020-08-18 16:17:11,553 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 16:17:11,555 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 16:17:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 16:17:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-18 16:17:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 16:17:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-18 16:17:11,575 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-18 16:17:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,575 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-18 16:17:11,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-18 16:17:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:17:11,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,580 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 16:17:11,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:17:11,581 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-18 16:17:11,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010844214] [2020-08-18 16:17:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,622 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 16:17:11,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010844214] [2020-08-18 16:17:11,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986582379] [2020-08-18 16:17:11,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,626 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-18 16:17:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,660 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-18 16:17:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 16:17:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,663 INFO L225 Difference]: With dead ends: 524 [2020-08-18 16:17:11,663 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 16:17:11,664 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 16:17:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 16:17:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-18 16:17:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-18 16:17:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-18 16:17:11,678 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-18 16:17:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,678 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-18 16:17:11,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-18 16:17:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:11,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,679 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 16:17:11,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 16:17:11,680 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-18 16:17:11,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392652810] [2020-08-18 16:17:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,704 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 16:17:11,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392652810] [2020-08-18 16:17:11,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209813245] [2020-08-18 16:17:11,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,707 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-18 16:17:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,729 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-18 16:17:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 16:17:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,732 INFO L225 Difference]: With dead ends: 456 [2020-08-18 16:17:11,732 INFO L226 Difference]: Without dead ends: 314 [2020-08-18 16:17:11,733 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 16:17:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-18 16:17:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-18 16:17:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-18 16:17:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-18 16:17:11,745 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-18 16:17:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,745 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-18 16:17:11,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-18 16:17:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:11,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,747 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 16:17:11,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 16:17:11,747 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-18 16:17:11,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938426832] [2020-08-18 16:17:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,769 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 16:17:11,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938426832] [2020-08-18 16:17:11,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924628753] [2020-08-18 16:17:11,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,771 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-18 16:17:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,791 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-18 16:17:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 16:17:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,794 INFO L225 Difference]: With dead ends: 524 [2020-08-18 16:17:11,795 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 16:17:11,795 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 16:17:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 16:17:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-18 16:17:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 16:17:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-18 16:17:11,810 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-18 16:17:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,811 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-18 16:17:11,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-18 16:17:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:11,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,812 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 16:17:11,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 16:17:11,813 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-18 16:17:11,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750916359] [2020-08-18 16:17:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,832 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 16:17:11,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750916359] [2020-08-18 16:17:11,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908731897] [2020-08-18 16:17:11,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,834 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-18 16:17:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,860 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-18 16:17:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 16:17:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,864 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 16:17:11,864 INFO L226 Difference]: Without dead ends: 586 [2020-08-18 16:17:11,866 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 16:17:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-18 16:17:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-18 16:17:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-18 16:17:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-18 16:17:11,888 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-18 16:17:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,888 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-18 16:17:11,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-18 16:17:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:11,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,890 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 16:17:11,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 16:17:11,890 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,891 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-18 16:17:11,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512480524] [2020-08-18 16:17:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:11,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512480524] [2020-08-18 16:17:11,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083515558] [2020-08-18 16:17:11,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,914 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-18 16:17:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,945 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-18 16:17:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,949 INFO L225 Difference]: With dead ends: 876 [2020-08-18 16:17:11,950 INFO L226 Difference]: Without dead ends: 602 [2020-08-18 16:17:11,951 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 16:17:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-18 16:17:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-18 16:17:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-18 16:17:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-18 16:17:11,972 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-18 16:17:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,972 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-18 16:17:11,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-18 16:17:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,974 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 16:17:11,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 16:17:11,974 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-18 16:17:11,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871652999] [2020-08-18 16:17:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,996 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 16:17:11,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871652999] [2020-08-18 16:17:11,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478299354] [2020-08-18 16:17:11,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,999 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-18 16:17:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:12,035 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-18 16:17:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:12,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:12,041 INFO L225 Difference]: With dead ends: 970 [2020-08-18 16:17:12,042 INFO L226 Difference]: Without dead ends: 968 [2020-08-18 16:17:12,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-18 16:17:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-18 16:17:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-18 16:17:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-18 16:17:12,079 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-18 16:17:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:12,080 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-18 16:17:12,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-18 16:17:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:12,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:12,083 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 16:17:12,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 16:17:12,083 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-18 16:17:12,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:12,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040186769] [2020-08-18 16:17:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:12,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:12,105 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 16:17:12,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040186769] [2020-08-18 16:17:12,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:12,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:12,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85911087] [2020-08-18 16:17:12,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:12,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:12,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:12,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:12,108 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-18 16:17:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:12,162 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-18 16:17:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:12,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:12,163 INFO L225 Difference]: With dead ends: 1992 [2020-08-18 16:17:12,164 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:17:12,167 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 16:17:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:17:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:17:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:17:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:17:12,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-18 16:17:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:12,168 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:17:12,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:17:12,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:17:12,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 16:17:12,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:17:12,202 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 16:17:12,202 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:12,202 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:12,202 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:17:12,202 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-18 16:17:12,203 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-18 16:17:12,203 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,204 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,204 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,204 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-18 16:17:12,204 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-18 16:17:12,204 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,205 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-18 16:17:12,205 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-18 16:17:12,205 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-18 16:17:12,205 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,205 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-18 16:17:12,205 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-18 16:17:12,206 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-18 16:17:12,206 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-18 16:17:12,206 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,206 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,206 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,207 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-18 16:17:12,207 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,207 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 16:17:12,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:12 BoogieIcfgContainer [2020-08-18 16:17:12,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:12,235 INFO L168 Benchmark]: Toolchain (without parser) took 2768.66 ms. Allocated memory was 141.0 MB in the beginning and 244.3 MB in the end (delta: 103.3 MB). Free memory was 104.6 MB in the beginning and 209.4 MB in the end (delta: -104.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:12,238 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:17:12,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.69 ms. Allocated memory is still 141.0 MB. Free memory was 104.4 MB in the beginning and 93.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:12,240 INFO L168 Benchmark]: Boogie Preprocessor took 112.66 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.9 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:12,243 INFO L168 Benchmark]: RCFGBuilder took 321.64 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 166.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:12,244 INFO L168 Benchmark]: TraceAbstraction took 2059.66 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 166.0 MB in the beginning and 209.4 MB in the end (delta: -43.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:12,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.69 ms. Allocated memory is still 141.0 MB. Free memory was 104.4 MB in the beginning and 93.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.66 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.9 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.64 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 166.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2059.66 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 166.0 MB in the beginning and 209.4 MB in the end (delta: -43.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: 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: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...