/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:43:37,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:43:37,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:43:37,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:43:37,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:43:37,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:43:37,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:43:37,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:43:37,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:43:37,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:43:37,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:43:37,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:43:37,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:43:37,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:43:37,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:43:37,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:43:37,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:43:37,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:43:37,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:43:37,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:43:37,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:43:37,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:43:37,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:43:37,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:43:37,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:43:37,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:37,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:37,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:37,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:43:37,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:37,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:37,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:37,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:37,585 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:37,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:37,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:37,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:37,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:37,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:37,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:37,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:37,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:37,587 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:37,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:37,587 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:37,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:37,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:37,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:37,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:37,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:37,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:37,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:37,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:37,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:37,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:37,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:37,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:37,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:37,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:43:37,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:43:37,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:43:37,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:43:37,894 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:43:37,894 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:43:37,895 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 22:43:37,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6546a06a0/067d37a0bdb6451f84a552f645294b98/FLAG945d7a5d6 [2020-08-18 22:43:38,467 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:43:38,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 22:43:38,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6546a06a0/067d37a0bdb6451f84a552f645294b98/FLAG945d7a5d6 [2020-08-18 22:43:38,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6546a06a0/067d37a0bdb6451f84a552f645294b98 [2020-08-18 22:43:38,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:43:38,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:43:38,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:38,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:43:38,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:43:38,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:38" (1/1) ... [2020-08-18 22:43:38,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fc9fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:38, skipping insertion in model container [2020-08-18 22:43:38,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:38" (1/1) ... [2020-08-18 22:43:38,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:43:38,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:43:39,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:39,190 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:43:39,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:39,420 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:43:39,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39 WrapperNode [2020-08-18 22:43:39,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:39,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:43:39,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:43:39,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:43:39,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... [2020-08-18 22:43:39,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:43:39,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:43:39,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:43:39,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:43:39,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:39,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:43:39,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:43:39,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 22:43:39,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:43:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:43:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 22:43:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:43:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 22:43:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 22:43:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 22:43:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:43:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:43:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:43:39,814 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 22:43:40,319 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 22:43:40,319 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 22:43:40,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:43:40,331 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:43:40,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:40 BoogieIcfgContainer [2020-08-18 22:43:40,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:43:40,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:43:40,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:43:40,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:43:40,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:38" (1/3) ... [2020-08-18 22:43:40,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0aac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:40, skipping insertion in model container [2020-08-18 22:43:40,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:39" (2/3) ... [2020-08-18 22:43:40,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0aac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:40, skipping insertion in model container [2020-08-18 22:43:40,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:40" (3/3) ... [2020-08-18 22:43:40,345 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-08-18 22:43:40,355 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:43:40,363 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:43:40,377 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:43:40,403 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:43:40,403 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:43:40,403 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:43:40,404 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:43:40,404 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:43:40,404 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:43:40,404 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:43:40,404 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:43:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-18 22:43:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:43:40,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:40,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:40,439 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:40,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-08-18 22:43:40,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:40,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360698440] [2020-08-18 22:43:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:40,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:40,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360698440] [2020-08-18 22:43:40,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:40,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:40,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445113915] [2020-08-18 22:43:40,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:40,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:40,830 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-08-18 22:43:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:41,237 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-08-18 22:43:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:41,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 22:43:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:41,253 INFO L225 Difference]: With dead ends: 362 [2020-08-18 22:43:41,253 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 22:43:41,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 22:43:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-08-18 22:43:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 22:43:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-08-18 22:43:41,322 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-08-18 22:43:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:41,322 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-08-18 22:43:41,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-08-18 22:43:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:43:41,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:41,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:41,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:43:41,326 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:41,326 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-08-18 22:43:41,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:41,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889648908] [2020-08-18 22:43:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:41,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889648908] [2020-08-18 22:43:41,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:41,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:41,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15308982] [2020-08-18 22:43:41,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:41,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:41,477 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-08-18 22:43:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:41,718 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-08-18 22:43:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:41,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 22:43:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:41,727 INFO L225 Difference]: With dead ends: 363 [2020-08-18 22:43:41,727 INFO L226 Difference]: Without dead ends: 199 [2020-08-18 22:43:41,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-18 22:43:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-08-18 22:43:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-18 22:43:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-08-18 22:43:41,767 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-08-18 22:43:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-08-18 22:43:41,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-08-18 22:43:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:43:41,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:41,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:41,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:43:41,773 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:41,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-08-18 22:43:41,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:41,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023061672] [2020-08-18 22:43:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:41,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:41,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023061672] [2020-08-18 22:43:41,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:41,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:41,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371276542] [2020-08-18 22:43:41,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:41,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:41,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:41,881 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-08-18 22:43:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:42,110 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-08-18 22:43:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:42,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 22:43:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:42,116 INFO L225 Difference]: With dead ends: 393 [2020-08-18 22:43:42,117 INFO L226 Difference]: Without dead ends: 207 [2020-08-18 22:43:42,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-18 22:43:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-08-18 22:43:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-18 22:43:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-08-18 22:43:42,155 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-08-18 22:43:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:42,155 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-08-18 22:43:42,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-08-18 22:43:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:43:42,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:42,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:42,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:43:42,161 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-08-18 22:43:42,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:42,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860204283] [2020-08-18 22:43:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:42,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:42,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860204283] [2020-08-18 22:43:42,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:42,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:42,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131249200] [2020-08-18 22:43:42,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:42,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:42,273 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-08-18 22:43:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:42,550 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-08-18 22:43:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:42,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 22:43:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:42,555 INFO L225 Difference]: With dead ends: 398 [2020-08-18 22:43:42,555 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 22:43:42,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 22:43:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-18 22:43:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 22:43:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-08-18 22:43:42,590 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-08-18 22:43:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:42,591 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-08-18 22:43:42,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-08-18 22:43:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 22:43:42,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:42,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:42,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:43:42,593 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:42,595 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-08-18 22:43:42,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:42,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071772774] [2020-08-18 22:43:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:42,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:42,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071772774] [2020-08-18 22:43:42,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:42,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:42,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345925632] [2020-08-18 22:43:42,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:42,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:42,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:42,697 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-08-18 22:43:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:42,891 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-08-18 22:43:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:42,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 22:43:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:42,894 INFO L225 Difference]: With dead ends: 409 [2020-08-18 22:43:42,894 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 22:43:42,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 22:43:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 22:43:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 22:43:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-08-18 22:43:42,907 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-08-18 22:43:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:42,908 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-08-18 22:43:42,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-08-18 22:43:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 22:43:42,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:42,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:42,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:43:42,910 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:42,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-08-18 22:43:42,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:42,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808229079] [2020-08-18 22:43:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:42,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808229079] [2020-08-18 22:43:42,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:42,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:42,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308944450] [2020-08-18 22:43:42,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:42,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:42,966 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-08-18 22:43:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:43,171 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-08-18 22:43:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:43,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-18 22:43:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:43,173 INFO L225 Difference]: With dead ends: 409 [2020-08-18 22:43:43,173 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 22:43:43,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 22:43:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 22:43:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 22:43:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-08-18 22:43:43,185 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-08-18 22:43:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:43,186 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-08-18 22:43:43,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-08-18 22:43:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:43:43,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:43,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:43:43,188 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-08-18 22:43:43,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373368889] [2020-08-18 22:43:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:43,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373368889] [2020-08-18 22:43:43,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:43,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:43,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388585879] [2020-08-18 22:43:43,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:43,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:43,241 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-08-18 22:43:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:43,432 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-08-18 22:43:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:43,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-08-18 22:43:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:43,434 INFO L225 Difference]: With dead ends: 409 [2020-08-18 22:43:43,435 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 22:43:43,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 22:43:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 22:43:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 22:43:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-08-18 22:43:43,448 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-08-18 22:43:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:43,449 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-08-18 22:43:43,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-08-18 22:43:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:43:43,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:43,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:43:43,452 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-08-18 22:43:43,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128169373] [2020-08-18 22:43:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:43,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128169373] [2020-08-18 22:43:43,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:43,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:43:43,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590593664] [2020-08-18 22:43:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:43:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:43:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:43,540 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-08-18 22:43:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:43,879 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-08-18 22:43:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:43:43,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-18 22:43:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:43,883 INFO L225 Difference]: With dead ends: 605 [2020-08-18 22:43:43,884 INFO L226 Difference]: Without dead ends: 412 [2020-08-18 22:43:43,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:43:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-18 22:43:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-08-18 22:43:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-18 22:43:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-08-18 22:43:43,911 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-08-18 22:43:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:43,911 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-08-18 22:43:43,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:43:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-08-18 22:43:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 22:43:43,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:43,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:43:43,915 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-08-18 22:43:43,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768225116] [2020-08-18 22:43:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:43,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768225116] [2020-08-18 22:43:43,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:43,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:44,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247114520] [2020-08-18 22:43:44,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:44,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:44,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:44,004 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-08-18 22:43:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,246 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-08-18 22:43:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:44,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-18 22:43:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,249 INFO L225 Difference]: With dead ends: 847 [2020-08-18 22:43:44,250 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 22:43:44,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 22:43:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-08-18 22:43:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-18 22:43:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-08-18 22:43:44,276 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-08-18 22:43:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,277 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-08-18 22:43:44,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-08-18 22:43:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 22:43:44,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:44,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:43:44,279 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-08-18 22:43:44,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031459008] [2020-08-18 22:43:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:44,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031459008] [2020-08-18 22:43:44,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:44,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7101604] [2020-08-18 22:43:44,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:44,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:44,337 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-08-18 22:43:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,576 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-08-18 22:43:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:44,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-18 22:43:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,580 INFO L225 Difference]: With dead ends: 936 [2020-08-18 22:43:44,581 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 22:43:44,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 22:43:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-08-18 22:43:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-08-18 22:43:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-08-18 22:43:44,614 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-08-18 22:43:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,614 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-08-18 22:43:44,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-08-18 22:43:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 22:43:44,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:44,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:43:44,617 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-08-18 22:43:44,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323544999] [2020-08-18 22:43:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:43:44,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323544999] [2020-08-18 22:43:44,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:44,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044348243] [2020-08-18 22:43:44,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:44,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:44,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:44,692 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-08-18 22:43:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,916 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-08-18 22:43:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:44,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-18 22:43:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,920 INFO L225 Difference]: With dead ends: 993 [2020-08-18 22:43:44,921 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 22:43:44,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 22:43:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 22:43:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 22:43:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-08-18 22:43:44,950 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-08-18 22:43:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,950 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-08-18 22:43:44,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-08-18 22:43:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 22:43:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:44,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:43:44,953 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-08-18 22:43:44,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493776927] [2020-08-18 22:43:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:43:45,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493776927] [2020-08-18 22:43:45,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:45,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584585271] [2020-08-18 22:43:45,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:45,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:45,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:45,016 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-08-18 22:43:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,246 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-08-18 22:43:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:45,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 22:43:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,250 INFO L225 Difference]: With dead ends: 1027 [2020-08-18 22:43:45,250 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 22:43:45,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 22:43:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 22:43:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 22:43:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-08-18 22:43:45,281 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-08-18 22:43:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,281 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-08-18 22:43:45,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-08-18 22:43:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 22:43:45,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,283 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:45,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:43:45,283 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-08-18 22:43:45,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120589657] [2020-08-18 22:43:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:43:45,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120589657] [2020-08-18 22:43:45,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:45,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734475755] [2020-08-18 22:43:45,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:45,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:45,342 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-08-18 22:43:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,587 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-08-18 22:43:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:45,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 22:43:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,591 INFO L225 Difference]: With dead ends: 1074 [2020-08-18 22:43:45,591 INFO L226 Difference]: Without dead ends: 576 [2020-08-18 22:43:45,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-08-18 22:43:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-08-18 22:43:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-18 22:43:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-08-18 22:43:45,622 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-08-18 22:43:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,622 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-08-18 22:43:45,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-08-18 22:43:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 22:43:45,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:45,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:43:45,625 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-08-18 22:43:45,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982579751] [2020-08-18 22:43:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:45,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982579751] [2020-08-18 22:43:45,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:45,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439720420] [2020-08-18 22:43:45,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:45,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:45,699 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-08-18 22:43:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,939 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-08-18 22:43:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:45,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-08-18 22:43:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,943 INFO L225 Difference]: With dead ends: 1184 [2020-08-18 22:43:45,943 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 22:43:45,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 22:43:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 22:43:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 22:43:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-08-18 22:43:45,978 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-08-18 22:43:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,978 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-08-18 22:43:45,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-08-18 22:43:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 22:43:45,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:45,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:43:45,984 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-08-18 22:43:45,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371259753] [2020-08-18 22:43:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:46,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371259753] [2020-08-18 22:43:46,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:46,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:46,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079984716] [2020-08-18 22:43:46,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:46,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:46,050 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-08-18 22:43:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:46,399 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-08-18 22:43:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:46,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-18 22:43:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:46,405 INFO L225 Difference]: With dead ends: 1227 [2020-08-18 22:43:46,405 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 22:43:46,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:46,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 22:43:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 22:43:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 22:43:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-08-18 22:43:46,445 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-08-18 22:43:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:46,445 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-08-18 22:43:46,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-08-18 22:43:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-18 22:43:46,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:46,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:46,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:43:46,448 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-08-18 22:43:46,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:46,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728423244] [2020-08-18 22:43:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 22:43:46,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728423244] [2020-08-18 22:43:46,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:46,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:46,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500097299] [2020-08-18 22:43:46,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:46,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:46,524 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-08-18 22:43:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:46,760 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-08-18 22:43:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:46,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-08-18 22:43:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:46,764 INFO L225 Difference]: With dead ends: 1223 [2020-08-18 22:43:46,764 INFO L226 Difference]: Without dead ends: 619 [2020-08-18 22:43:46,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-08-18 22:43:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-08-18 22:43:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 22:43:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-08-18 22:43:46,797 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-08-18 22:43:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:46,798 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-08-18 22:43:46,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-08-18 22:43:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 22:43:46,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:46,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:46,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:43:46,801 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-08-18 22:43:46,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:46,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215702788] [2020-08-18 22:43:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 22:43:46,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215702788] [2020-08-18 22:43:46,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:46,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:46,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873302998] [2020-08-18 22:43:46,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:46,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:46,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:46,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:46,863 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-08-18 22:43:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:47,113 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-08-18 22:43:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:47,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-08-18 22:43:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:47,118 INFO L225 Difference]: With dead ends: 1281 [2020-08-18 22:43:47,118 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 22:43:47,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 22:43:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 22:43:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 22:43:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-08-18 22:43:47,173 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-08-18 22:43:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:47,173 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-08-18 22:43:47,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-08-18 22:43:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 22:43:47,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:47,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:47,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:43:47,176 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:47,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-08-18 22:43:47,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:47,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896938481] [2020-08-18 22:43:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:47,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 22:43:47,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896938481] [2020-08-18 22:43:47,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:47,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:47,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655184329] [2020-08-18 22:43:47,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:47,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:47,232 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-08-18 22:43:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:47,451 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-08-18 22:43:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:47,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-08-18 22:43:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:47,456 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 22:43:47,456 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 22:43:47,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 22:43:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 22:43:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 22:43:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-08-18 22:43:47,490 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-08-18 22:43:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:47,490 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-08-18 22:43:47,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-08-18 22:43:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-18 22:43:47,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:47,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:47,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:43:47,493 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-08-18 22:43:47,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:47,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210359629] [2020-08-18 22:43:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:47,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 22:43:47,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210359629] [2020-08-18 22:43:47,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:47,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:47,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516460489] [2020-08-18 22:43:47,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:47,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:47,607 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-08-18 22:43:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:47,910 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-08-18 22:43:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:47,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-08-18 22:43:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:47,915 INFO L225 Difference]: With dead ends: 1349 [2020-08-18 22:43:47,915 INFO L226 Difference]: Without dead ends: 713 [2020-08-18 22:43:47,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-18 22:43:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-08-18 22:43:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-08-18 22:43:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-08-18 22:43:47,954 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-08-18 22:43:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:47,954 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-08-18 22:43:47,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-08-18 22:43:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 22:43:47,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:47,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:47,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:43:47,958 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-08-18 22:43:47,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:47,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626361209] [2020-08-18 22:43:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 22:43:48,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626361209] [2020-08-18 22:43:48,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:48,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:48,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628620348] [2020-08-18 22:43:48,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:48,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:48,048 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-08-18 22:43:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:48,348 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-08-18 22:43:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:48,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-08-18 22:43:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:48,354 INFO L225 Difference]: With dead ends: 1406 [2020-08-18 22:43:48,354 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 22:43:48,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 22:43:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-08-18 22:43:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-18 22:43:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-08-18 22:43:48,405 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-08-18 22:43:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:48,405 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-08-18 22:43:48,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-08-18 22:43:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-18 22:43:48,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:48,408 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:48,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:43:48,408 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-08-18 22:43:48,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:48,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922813940] [2020-08-18 22:43:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 22:43:48,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922813940] [2020-08-18 22:43:48,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:48,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:48,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133179518] [2020-08-18 22:43:48,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:48,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:48,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:48,496 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-08-18 22:43:48,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:48,825 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-08-18 22:43:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:48,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-08-18 22:43:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:48,830 INFO L225 Difference]: With dead ends: 1438 [2020-08-18 22:43:48,830 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 22:43:48,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 22:43:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 22:43:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 22:43:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-08-18 22:43:48,892 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-08-18 22:43:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:48,893 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-08-18 22:43:48,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-08-18 22:43:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 22:43:48,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:48,897 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:48,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:43:48,898 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-08-18 22:43:48,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:48,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752652134] [2020-08-18 22:43:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 22:43:49,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752652134] [2020-08-18 22:43:49,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:49,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:49,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806903454] [2020-08-18 22:43:49,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:49,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:49,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:49,022 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-08-18 22:43:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:49,401 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-08-18 22:43:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:49,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-08-18 22:43:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:49,410 INFO L225 Difference]: With dead ends: 1479 [2020-08-18 22:43:49,410 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 22:43:49,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 22:43:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 22:43:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 22:43:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-08-18 22:43:49,481 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-08-18 22:43:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:49,481 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-08-18 22:43:49,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-08-18 22:43:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-18 22:43:49,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:49,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:49,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:43:49,486 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-08-18 22:43:49,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:49,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334335620] [2020-08-18 22:43:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 22:43:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334335620] [2020-08-18 22:43:49,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:49,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:49,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653369788] [2020-08-18 22:43:49,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:49,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:49,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:49,623 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-08-18 22:43:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:49,908 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-08-18 22:43:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:49,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-08-18 22:43:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:49,915 INFO L225 Difference]: With dead ends: 1515 [2020-08-18 22:43:49,915 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 22:43:49,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 22:43:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 22:43:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 22:43:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-08-18 22:43:49,982 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-08-18 22:43:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:49,983 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-08-18 22:43:49,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:49,983 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-08-18 22:43:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 22:43:49,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:49,987 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:49,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:43:49,988 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-08-18 22:43:49,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:49,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906790087] [2020-08-18 22:43:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 22:43:50,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906790087] [2020-08-18 22:43:50,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:50,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:50,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853357977] [2020-08-18 22:43:50,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:50,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:50,085 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-08-18 22:43:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:50,316 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-08-18 22:43:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:50,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-08-18 22:43:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:50,321 INFO L225 Difference]: With dead ends: 1547 [2020-08-18 22:43:50,321 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 22:43:50,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 22:43:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 22:43:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 22:43:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-08-18 22:43:50,373 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-08-18 22:43:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:50,373 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-08-18 22:43:50,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-08-18 22:43:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-18 22:43:50,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:50,376 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:50,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 22:43:50,377 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-08-18 22:43:50,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:50,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795182507] [2020-08-18 22:43:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 22:43:50,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795182507] [2020-08-18 22:43:50,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:50,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:50,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457277835] [2020-08-18 22:43:50,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:50,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:50,477 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-08-18 22:43:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:50,782 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-08-18 22:43:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:50,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-18 22:43:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:50,789 INFO L225 Difference]: With dead ends: 1573 [2020-08-18 22:43:50,789 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 22:43:50,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 22:43:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 22:43:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 22:43:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-08-18 22:43:50,863 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-08-18 22:43:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:50,864 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-08-18 22:43:50,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-08-18 22:43:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 22:43:50,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:50,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:50,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 22:43:50,869 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:50,870 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-08-18 22:43:50,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:50,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562955370] [2020-08-18 22:43:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 22:43:50,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562955370] [2020-08-18 22:43:50,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:50,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:50,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286794355] [2020-08-18 22:43:50,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:50,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:50,980 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-08-18 22:43:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,287 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-08-18 22:43:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:51,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-08-18 22:43:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,294 INFO L225 Difference]: With dead ends: 1601 [2020-08-18 22:43:51,294 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 22:43:51,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 22:43:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 22:43:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 22:43:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-08-18 22:43:51,373 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-08-18 22:43:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,374 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-08-18 22:43:51,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-08-18 22:43:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 22:43:51,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 22:43:51,379 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-08-18 22:43:51,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160195543] [2020-08-18 22:43:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 22:43:51,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160195543] [2020-08-18 22:43:51,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:51,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:51,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966427984] [2020-08-18 22:43:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:51,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:51,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:51,510 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-08-18 22:43:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:51,892 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-08-18 22:43:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:51,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-18 22:43:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:51,899 INFO L225 Difference]: With dead ends: 1656 [2020-08-18 22:43:51,899 INFO L226 Difference]: Without dead ends: 866 [2020-08-18 22:43:51,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-08-18 22:43:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-08-18 22:43:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-08-18 22:43:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-08-18 22:43:51,974 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-08-18 22:43:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:51,975 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-08-18 22:43:51,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-08-18 22:43:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 22:43:51,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 22:43:51,981 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-08-18 22:43:51,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816497004] [2020-08-18 22:43:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 22:43:52,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816497004] [2020-08-18 22:43:52,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:52,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828253160] [2020-08-18 22:43:52,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:52,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:52,077 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-08-18 22:43:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,328 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-08-18 22:43:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:52,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-08-18 22:43:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,333 INFO L225 Difference]: With dead ends: 1705 [2020-08-18 22:43:52,333 INFO L226 Difference]: Without dead ends: 850 [2020-08-18 22:43:52,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-18 22:43:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-08-18 22:43:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 22:43:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-08-18 22:43:52,381 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-08-18 22:43:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,381 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-08-18 22:43:52,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-08-18 22:43:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 22:43:52,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 22:43:52,384 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-08-18 22:43:52,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730039476] [2020-08-18 22:43:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 22:43:52,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730039476] [2020-08-18 22:43:52,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:52,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690037224] [2020-08-18 22:43:52,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:52,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:52,485 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-08-18 22:43:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,782 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-08-18 22:43:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:52,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-18 22:43:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,787 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 22:43:52,787 INFO L226 Difference]: Without dead ends: 848 [2020-08-18 22:43:52,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-08-18 22:43:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-08-18 22:43:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 22:43:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-08-18 22:43:52,867 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-08-18 22:43:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,867 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-08-18 22:43:52,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-08-18 22:43:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 22:43:52,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 22:43:52,869 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-08-18 22:43:52,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767216250] [2020-08-18 22:43:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 22:43:52,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767216250] [2020-08-18 22:43:52,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:52,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639049797] [2020-08-18 22:43:52,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:52,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:52,953 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-08-18 22:43:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,251 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-08-18 22:43:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:53,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 22:43:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,255 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 22:43:53,256 INFO L226 Difference]: Without dead ends: 831 [2020-08-18 22:43:53,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-18 22:43:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-08-18 22:43:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-08-18 22:43:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-08-18 22:43:53,310 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-08-18 22:43:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,310 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-08-18 22:43:53,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-08-18 22:43:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 22:43:53,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 22:43:53,313 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-08-18 22:43:53,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749540270] [2020-08-18 22:43:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 22:43:53,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749540270] [2020-08-18 22:43:53,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170551414] [2020-08-18 22:43:53,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,385 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-08-18 22:43:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,477 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-08-18 22:43:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 22:43:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,486 INFO L225 Difference]: With dead ends: 2417 [2020-08-18 22:43:53,486 INFO L226 Difference]: Without dead ends: 1611 [2020-08-18 22:43:53,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-08-18 22:43:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-08-18 22:43:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-08-18 22:43:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-08-18 22:43:53,550 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-08-18 22:43:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,550 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-08-18 22:43:53,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-08-18 22:43:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 22:43:53,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,553 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 22:43:53,553 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-08-18 22:43:53,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411908071] [2020-08-18 22:43:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-08-18 22:43:53,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411908071] [2020-08-18 22:43:53,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471840531] [2020-08-18 22:43:53,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,647 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-08-18 22:43:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,765 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-08-18 22:43:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 22:43:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,773 INFO L225 Difference]: With dead ends: 2416 [2020-08-18 22:43:53,773 INFO L226 Difference]: Without dead ends: 1608 [2020-08-18 22:43:53,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-08-18 22:43:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-08-18 22:43:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 22:43:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-08-18 22:43:53,874 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-08-18 22:43:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,875 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-08-18 22:43:53,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-08-18 22:43:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-18 22:43:53,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,878 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 22:43:53,878 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-08-18 22:43:53,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065931303] [2020-08-18 22:43:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 22:43:54,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065931303] [2020-08-18 22:43:54,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112127352] [2020-08-18 22:43:54,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,067 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-08-18 22:43:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,326 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-08-18 22:43:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-08-18 22:43:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:54,344 INFO L225 Difference]: With dead ends: 4752 [2020-08-18 22:43:54,345 INFO L226 Difference]: Without dead ends: 3159 [2020-08-18 22:43:54,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-08-18 22:43:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-08-18 22:43:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 22:43:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-08-18 22:43:54,538 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-08-18 22:43:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:54,539 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-08-18 22:43:54,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-08-18 22:43:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 22:43:54,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,543 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 22:43:54,544 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,545 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-08-18 22:43:54,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877417663] [2020-08-18 22:43:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 22:43:54,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877417663] [2020-08-18 22:43:54,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220810631] [2020-08-18 22:43:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,651 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-08-18 22:43:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,992 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-08-18 22:43:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-08-18 22:43:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:55,022 INFO L225 Difference]: With dead ends: 4792 [2020-08-18 22:43:55,022 INFO L226 Difference]: Without dead ends: 3199 [2020-08-18 22:43:55,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-08-18 22:43:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-08-18 22:43:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-08-18 22:43:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-08-18 22:43:55,229 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-08-18 22:43:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:55,229 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-08-18 22:43:55,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-08-18 22:43:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 22:43:55,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:55,233 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:55,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 22:43:55,234 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:55,234 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-08-18 22:43:55,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:55,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251114765] [2020-08-18 22:43:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:43:55,289 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:43:55,289 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:43:55,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 22:43:55,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:55 BoogieIcfgContainer [2020-08-18 22:43:55,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:55,332 INFO L168 Benchmark]: Toolchain (without parser) took 16519.34 ms. Allocated memory was 140.5 MB in the beginning and 481.3 MB in the end (delta: 340.8 MB). Free memory was 102.7 MB in the beginning and 204.0 MB in the end (delta: -101.2 MB). Peak memory consumption was 239.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,332 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 608.12 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.3 MB in the beginning and 179.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,333 INFO L168 Benchmark]: Boogie Preprocessor took 60.75 ms. Allocated memory is still 204.5 MB. Free memory was 179.3 MB in the beginning and 175.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,334 INFO L168 Benchmark]: RCFGBuilder took 854.11 ms. Allocated memory is still 204.5 MB. Free memory was 175.6 MB in the beginning and 117.3 MB in the end (delta: 58.3 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,334 INFO L168 Benchmark]: TraceAbstraction took 14991.82 ms. Allocated memory was 204.5 MB in the beginning and 481.3 MB in the end (delta: 276.8 MB). Free memory was 117.3 MB in the beginning and 204.0 MB in the end (delta: -86.7 MB). Peak memory consumption was 190.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,336 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 608.12 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.3 MB in the beginning and 179.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.75 ms. Allocated memory is still 204.5 MB. Free memory was 179.3 MB in the beginning and 175.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 854.11 ms. Allocated memory is still 204.5 MB. Free memory was 175.6 MB in the beginning and 117.3 MB in the end (delta: 58.3 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14991.82 ms. Allocated memory was 204.5 MB in the beginning and 481.3 MB in the end (delta: 276.8 MB). Free memory was 117.3 MB in the beginning and 204.0 MB in the end (delta: -86.7 MB). Peak memory consumption was 190.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L702] int s ; [L703] int tmp ; [L707] s = 8464 [L708] CALL ssl3_accept(s) [L12] int s__info_callback = __VERIFIER_nondet_int() ; [L13] int s__in_handshake = __VERIFIER_nondet_int() ; [L14] int s__state ; [L15] int s__new_session ; [L16] int s__server ; [L17] int s__version = __VERIFIER_nondet_int() ; [L18] int s__type ; [L19] int s__init_num ; [L20] int s__hit = __VERIFIER_nondet_int() ; [L21] int s__rwstate ; [L22] int s__init_buf___0 = 1; [L23] int s__debug = __VERIFIER_nondet_int() ; [L24] int s__shutdown ; [L25] int s__cert = __VERIFIER_nondet_int() ; [L26] int s__options = __VERIFIER_nondet_int() ; [L27] int s__verify_mode = __VERIFIER_nondet_int() ; [L28] int s__session__peer = __VERIFIER_nondet_int() ; [L29] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L30] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L34] int s__s3__tmp__cert_request ; [L35] int s__s3__tmp__reuse_message ; [L36] int s__s3__tmp__use_rsa_tmp ; [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__new_cipher__algorithms ; [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_cipher__algo_strength ; [L41] int s__session__cipher ; [L42] int buf ; [L43] unsigned long l ; [L44] unsigned long Time ; [L45] unsigned long tmp ; [L46] int cb ; [L47] long num1 = __VERIFIER_nondet_long() ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int got_new_session ; [L53] int tmp___1 = __VERIFIER_nondet_int() ; [L54] int tmp___2 = __VERIFIER_nondet_int() ; [L55] int tmp___3 = __VERIFIER_nondet_int() ; [L56] int tmp___4 = __VERIFIER_nondet_int() ; [L57] int tmp___5 = __VERIFIER_nondet_int() ; [L58] int tmp___6 = __VERIFIER_nondet_int() ; [L59] int tmp___7 ; [L60] long tmp___8 = __VERIFIER_nondet_long() ; [L61] int tmp___9 = __VERIFIER_nondet_int() ; [L62] int tmp___10 = __VERIFIER_nondet_int() ; [L63] int blastFlag ; [L64] int __cil_tmp55 ; [L65] unsigned long __cil_tmp56 ; [L66] unsigned long __cil_tmp57 ; [L67] unsigned long __cil_tmp58 ; [L68] unsigned long __cil_tmp59 ; [L69] int __cil_tmp60 ; [L70] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] __cil_tmp56 = 256345 [L307] skip = 1 [L318] s__state = 8528 [L319] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L323] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L324] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L326] __cil_tmp57 = (unsigned long )s__options [L327] COND TRUE __cil_tmp57 + 2097152UL [L328] s__s3__tmp__use_rsa_tmp = 1 [L333] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(blastFlag == 3) [L365] COND FALSE !(ret <= 0) [L382] s__state = 8544 [L383] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND TRUE s__state == 8544 [L387] COND TRUE s__verify_mode + 1 [L388] COND TRUE s__session__peer != 0 [L389] COND TRUE s__verify_mode + 4 [L390] s__verify_mode = 123 [L391] skip = 1 [L392] s__s3__tmp__cert_request = 0 [L393] s__state = 8560 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND TRUE s__state == 8560 [L437] ret = __VERIFIER_nondet_int() [L438] COND FALSE !(ret <= 0) [L441] s__s3__tmp__next_state___0 = 8576 [L442] s__state = 8448 [L443] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND TRUE ! s__s3__tmp__reuse_message [L653] COND TRUE ! skip [L654] COND TRUE state == 8560 [L655] COND TRUE s__state == 8448 [L656] COND TRUE s__verify_mode != -1 [L657] COND TRUE s__verify_mode != -2 [L658] COND TRUE __cil_tmp61 != 9021 [L659] COND TRUE __cil_tmp58 != 4294967294 [L660] COND TRUE blastFlag != 4 [L661] COND TRUE tmp___7 != 1024 [L697] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 175 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.8s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7259 SDtfs, 16112 SDslu, 7753 SDs, 0 SdLazy, 4949 SolverSat, 1408 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3197occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 3391 NumberOfCodeBlocks, 3391 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3195 ConstructedInterpolants, 0 QuantifiedInterpolants, 632376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 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 incorrect! Received shutdown request...