/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 20:34:06,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:34:06,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:34:06,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:34:06,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:34:06,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:34:06,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:34:06,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:34:06,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:34:06,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:34:06,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:34:06,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:34:06,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:34:06,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:34:06,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:34:06,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:34:06,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:34:06,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:34:06,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:34:06,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:34:06,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:34:06,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:34:06,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:34:06,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:34:06,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:34:06,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:34:06,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:34:06,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:34:06,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:34:06,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:34:06,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:34:06,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:34:06,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:34:06,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:34:06,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:34:06,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:34:06,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:34:06,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:34:06,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:34:06,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:34:06,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:34:06,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:34:06,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:34:06,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:34:06,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:34:06,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:34:06,283 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:34:06,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:34:06,283 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:34:06,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:34:06,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:34:06,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:34:06,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:34:06,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:34:06,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:34:06,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:34:06,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:34:06,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:34:06,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:34:06,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:34:06,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:34:06,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:34:06,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:34:06,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:34:06,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:34:06,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:34:06,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:34:06,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:34:06,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:34:06,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:34:06,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:34:06,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:34:06,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:34:06,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:34:06,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:34:06,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:34:06,601 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:34:06,602 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-21 20:34:06,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52a9e542f/c013fe74dabc4ddf988a3e3e90205d47/FLAGd41493a30 [2020-08-21 20:34:07,207 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:34:07,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-21 20:34:07,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52a9e542f/c013fe74dabc4ddf988a3e3e90205d47/FLAGd41493a30 [2020-08-21 20:34:07,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52a9e542f/c013fe74dabc4ddf988a3e3e90205d47 [2020-08-21 20:34:07,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:34:07,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:34:07,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:34:07,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:34:07,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:34:07,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:34:07" (1/1) ... [2020-08-21 20:34:07,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6fb2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:07, skipping insertion in model container [2020-08-21 20:34:07,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:34:07" (1/1) ... [2020-08-21 20:34:07,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:34:07,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:34:07,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:34:07,832 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:34:08,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:34:08,050 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:34:08,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08 WrapperNode [2020-08-21 20:34:08,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:34:08,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:34:08,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:34:08,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:34:08,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... [2020-08-21 20:34:08,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:34:08,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:34:08,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:34:08,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:34:08,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:34:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:34:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:34:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 20:34:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:34:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:34:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 20:34:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:34:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 20:34:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 20:34:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 20:34:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:34:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:34:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:34:08,455 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 20:34:08,984 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 20:34:08,984 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 20:34:08,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:34:08,996 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:34:09,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:34:09 BoogieIcfgContainer [2020-08-21 20:34:09,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:34:09,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:34:09,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:34:09,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:34:09,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:34:07" (1/3) ... [2020-08-21 20:34:09,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5148d3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:34:09, skipping insertion in model container [2020-08-21 20:34:09,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:08" (2/3) ... [2020-08-21 20:34:09,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5148d3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:34:09, skipping insertion in model container [2020-08-21 20:34:09,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:34:09" (3/3) ... [2020-08-21 20:34:09,011 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-08-21 20:34:09,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:34:09,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:34:09,046 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:34:09,072 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:34:09,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:34:09,073 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:34:09,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:34:09,073 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:34:09,073 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:34:09,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:34:09,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:34:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-21 20:34:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 20:34:09,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:09,107 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] [2020-08-21 20:34:09,108 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-08-21 20:34:09,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:09,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927729325] [2020-08-21 20:34:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:09,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:09,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927729325] [2020-08-21 20:34:09,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:09,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:09,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602595221] [2020-08-21 20:34:09,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:09,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:09,443 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-08-21 20:34:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:09,782 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-08-21 20:34:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:09,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 20:34:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:09,799 INFO L225 Difference]: With dead ends: 362 [2020-08-21 20:34:09,799 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 20:34:09,805 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 [2020-08-21 20:34:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 20:34:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-08-21 20:34:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-21 20:34:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-08-21 20:34:09,867 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-08-21 20:34:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:09,868 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-08-21 20:34:09,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-08-21 20:34:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:34:09,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:09,870 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] [2020-08-21 20:34:09,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:34:09,871 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-08-21 20:34:09,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:09,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448481982] [2020-08-21 20:34:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:09,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448481982] [2020-08-21 20:34:09,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:09,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:09,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375418784] [2020-08-21 20:34:09,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:09,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:09,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:09,972 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-08-21 20:34:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:10,180 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-08-21 20:34:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:10,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-21 20:34:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:10,184 INFO L225 Difference]: With dead ends: 363 [2020-08-21 20:34:10,184 INFO L226 Difference]: Without dead ends: 199 [2020-08-21 20:34:10,186 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 [2020-08-21 20:34:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-21 20:34:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-08-21 20:34:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-21 20:34:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-08-21 20:34:10,210 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-08-21 20:34:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:10,210 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-08-21 20:34:10,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-08-21 20:34:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:34:10,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:10,215 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] [2020-08-21 20:34:10,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:34:10,216 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-08-21 20:34:10,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:10,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563152875] [2020-08-21 20:34:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:10,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:10,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563152875] [2020-08-21 20:34:10,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:10,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:10,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133787211] [2020-08-21 20:34:10,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:10,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:10,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:10,327 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-08-21 20:34:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:10,570 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-08-21 20:34:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:10,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-21 20:34:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:10,573 INFO L225 Difference]: With dead ends: 393 [2020-08-21 20:34:10,574 INFO L226 Difference]: Without dead ends: 207 [2020-08-21 20:34:10,575 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 [2020-08-21 20:34:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-21 20:34:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-08-21 20:34:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-21 20:34:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-08-21 20:34:10,592 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-08-21 20:34:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:10,593 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-08-21 20:34:10,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-08-21 20:34:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:34:10,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:10,595 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] [2020-08-21 20:34:10,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:34:10,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:10,596 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-08-21 20:34:10,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:10,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173192085] [2020-08-21 20:34:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:10,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:10,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173192085] [2020-08-21 20:34:10,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:10,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:10,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442375446] [2020-08-21 20:34:10,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:10,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:10,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:10,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:10,707 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-08-21 20:34:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:10,908 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-08-21 20:34:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:10,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-21 20:34:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:10,910 INFO L225 Difference]: With dead ends: 398 [2020-08-21 20:34:10,910 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 20:34:10,911 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 [2020-08-21 20:34:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 20:34:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 20:34:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 20:34:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-08-21 20:34:10,923 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-08-21 20:34:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:10,924 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-08-21 20:34:10,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-08-21 20:34:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 20:34:10,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:10,925 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] [2020-08-21 20:34:10,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:34:10,926 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-08-21 20:34:10,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:10,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725586526] [2020-08-21 20:34:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:10,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725586526] [2020-08-21 20:34:10,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:10,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:10,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104374907] [2020-08-21 20:34:10,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:10,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:10,997 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-08-21 20:34:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,185 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-08-21 20:34:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:11,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-21 20:34:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,187 INFO L225 Difference]: With dead ends: 409 [2020-08-21 20:34:11,187 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 20:34:11,189 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 [2020-08-21 20:34:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 20:34:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-21 20:34:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 20:34:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-08-21 20:34:11,203 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-08-21 20:34:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,206 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-08-21 20:34:11,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-08-21 20:34:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 20:34:11,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,213 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] [2020-08-21 20:34:11,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:34:11,213 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-08-21 20:34:11,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514164891] [2020-08-21 20:34:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514164891] [2020-08-21 20:34:11,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:11,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523509092] [2020-08-21 20:34:11,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:11,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:11,310 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-08-21 20:34:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,518 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-08-21 20:34:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:11,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-21 20:34:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,521 INFO L225 Difference]: With dead ends: 409 [2020-08-21 20:34:11,521 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 20:34:11,522 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 [2020-08-21 20:34:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 20:34:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-21 20:34:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 20:34:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-08-21 20:34:11,543 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-08-21 20:34:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,544 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-08-21 20:34:11,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-08-21 20:34:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 20:34:11,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:11,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:34:11,546 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-08-21 20:34:11,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048707286] [2020-08-21 20:34:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048707286] [2020-08-21 20:34:11,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:11,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017221309] [2020-08-21 20:34:11,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:11,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:11,633 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-08-21 20:34:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:11,814 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-08-21 20:34:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:11,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-08-21 20:34:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:11,817 INFO L225 Difference]: With dead ends: 409 [2020-08-21 20:34:11,817 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 20:34:11,818 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 [2020-08-21 20:34:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 20:34:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-21 20:34:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 20:34:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-08-21 20:34:11,832 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-08-21 20:34:11,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:11,832 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-08-21 20:34:11,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-08-21 20:34:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 20:34:11,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:11,835 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] [2020-08-21 20:34:11,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:34:11,836 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-08-21 20:34:11,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:11,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705744938] [2020-08-21 20:34:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:11,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705744938] [2020-08-21 20:34:11,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:11,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:34:11,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136868656] [2020-08-21 20:34:11,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:34:11,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:11,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:34:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:34:11,931 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-08-21 20:34:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,258 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-08-21 20:34:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 20:34:12,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-21 20:34:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,262 INFO L225 Difference]: With dead ends: 605 [2020-08-21 20:34:12,262 INFO L226 Difference]: Without dead ends: 412 [2020-08-21 20:34:12,263 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 [2020-08-21 20:34:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-21 20:34:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-08-21 20:34:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-21 20:34:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-08-21 20:34:12,285 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-08-21 20:34:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,285 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-08-21 20:34:12,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:34:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-08-21 20:34:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 20:34:12,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,287 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] [2020-08-21 20:34:12,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:34:12,287 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-08-21 20:34:12,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452547625] [2020-08-21 20:34:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452547625] [2020-08-21 20:34:12,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:12,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767688110] [2020-08-21 20:34:12,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:12,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:12,385 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-08-21 20:34:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:12,652 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-08-21 20:34:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:12,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-21 20:34:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:12,656 INFO L225 Difference]: With dead ends: 847 [2020-08-21 20:34:12,656 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 20:34:12,657 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 [2020-08-21 20:34:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 20:34:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-08-21 20:34:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-21 20:34:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-08-21 20:34:12,683 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-08-21 20:34:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:12,683 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-08-21 20:34:12,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-08-21 20:34:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 20:34:12,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:12,685 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] [2020-08-21 20:34:12,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:34:12,685 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-08-21 20:34:12,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:12,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906432398] [2020-08-21 20:34:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:12,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906432398] [2020-08-21 20:34:12,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:12,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:12,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988195204] [2020-08-21 20:34:12,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:12,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:12,759 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-08-21 20:34:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,008 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-08-21 20:34:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:13,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-21 20:34:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,012 INFO L225 Difference]: With dead ends: 936 [2020-08-21 20:34:13,012 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 20:34:13,014 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 [2020-08-21 20:34:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 20:34:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-08-21 20:34:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-08-21 20:34:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-08-21 20:34:13,038 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-08-21 20:34:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,038 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-08-21 20:34:13,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-08-21 20:34:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 20:34:13,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,040 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] [2020-08-21 20:34:13,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:34:13,041 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,041 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-08-21 20:34:13,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087127369] [2020-08-21 20:34:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 20:34:13,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087127369] [2020-08-21 20:34:13,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:13,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761050373] [2020-08-21 20:34:13,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:13,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:13,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:13,114 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-08-21 20:34:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,377 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-08-21 20:34:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:13,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-21 20:34:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,382 INFO L225 Difference]: With dead ends: 993 [2020-08-21 20:34:13,382 INFO L226 Difference]: Without dead ends: 529 [2020-08-21 20:34:13,384 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 [2020-08-21 20:34:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-21 20:34:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-21 20:34:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-21 20:34:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-08-21 20:34:13,411 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-08-21 20:34:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,411 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-08-21 20:34:13,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-08-21 20:34:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 20:34:13,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,413 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] [2020-08-21 20:34:13,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:34:13,414 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-08-21 20:34:13,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958787394] [2020-08-21 20:34:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 20:34:13,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958787394] [2020-08-21 20:34:13,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:13,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222841862] [2020-08-21 20:34:13,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:13,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:13,484 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-08-21 20:34:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:13,723 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-08-21 20:34:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:13,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-21 20:34:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:13,727 INFO L225 Difference]: With dead ends: 1027 [2020-08-21 20:34:13,727 INFO L226 Difference]: Without dead ends: 529 [2020-08-21 20:34:13,729 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 [2020-08-21 20:34:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-21 20:34:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-21 20:34:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-21 20:34:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-08-21 20:34:13,756 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-08-21 20:34:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:13,756 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-08-21 20:34:13,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-08-21 20:34:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 20:34:13,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:13,758 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] [2020-08-21 20:34:13,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:34:13,758 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:13,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-08-21 20:34:13,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:13,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544735436] [2020-08-21 20:34:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 20:34:13,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544735436] [2020-08-21 20:34:13,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:13,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:13,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490445789] [2020-08-21 20:34:13,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:13,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:13,824 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-08-21 20:34:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:14,081 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-08-21 20:34:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:14,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-21 20:34:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:14,086 INFO L225 Difference]: With dead ends: 1074 [2020-08-21 20:34:14,087 INFO L226 Difference]: Without dead ends: 576 [2020-08-21 20:34:14,088 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 [2020-08-21 20:34:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-08-21 20:34:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-08-21 20:34:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-21 20:34:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-08-21 20:34:14,123 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-08-21 20:34:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:14,123 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-08-21 20:34:14,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-08-21 20:34:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:34:14,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:14,126 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] [2020-08-21 20:34:14,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:34:14,127 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:14,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-08-21 20:34:14,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:14,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880080898] [2020-08-21 20:34:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:14,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880080898] [2020-08-21 20:34:14,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:14,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:14,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57863258] [2020-08-21 20:34:14,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:14,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:14,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:14,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:14,193 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-08-21 20:34:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:14,411 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-08-21 20:34:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:14,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-08-21 20:34:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:14,415 INFO L225 Difference]: With dead ends: 1184 [2020-08-21 20:34:14,415 INFO L226 Difference]: Without dead ends: 623 [2020-08-21 20:34:14,417 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 [2020-08-21 20:34:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-21 20:34:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-21 20:34:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-21 20:34:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-08-21 20:34:14,448 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-08-21 20:34:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:14,448 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-08-21 20:34:14,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-08-21 20:34:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 20:34:14,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:14,451 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] [2020-08-21 20:34:14,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 20:34:14,451 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-08-21 20:34:14,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:14,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737131170] [2020-08-21 20:34:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:14,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737131170] [2020-08-21 20:34:14,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:14,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:14,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143193522] [2020-08-21 20:34:14,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:14,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:14,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:14,500 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-08-21 20:34:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:14,734 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-08-21 20:34:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:14,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-21 20:34:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:14,738 INFO L225 Difference]: With dead ends: 1227 [2020-08-21 20:34:14,739 INFO L226 Difference]: Without dead ends: 623 [2020-08-21 20:34:14,740 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 [2020-08-21 20:34:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-21 20:34:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-21 20:34:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-21 20:34:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-08-21 20:34:14,777 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-08-21 20:34:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:14,777 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-08-21 20:34:14,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-08-21 20:34:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 20:34:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:14,780 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] [2020-08-21 20:34:14,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 20:34:14,780 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-08-21 20:34:14,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:14,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511870852] [2020-08-21 20:34:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 20:34:14,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511870852] [2020-08-21 20:34:14,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:14,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:14,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682386249] [2020-08-21 20:34:14,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:14,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:14,857 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-08-21 20:34:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:15,103 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-08-21 20:34:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:15,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-08-21 20:34:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:15,107 INFO L225 Difference]: With dead ends: 1223 [2020-08-21 20:34:15,107 INFO L226 Difference]: Without dead ends: 619 [2020-08-21 20:34:15,109 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 [2020-08-21 20:34:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-08-21 20:34:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-08-21 20:34:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-21 20:34:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-08-21 20:34:15,139 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-08-21 20:34:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:15,139 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-08-21 20:34:15,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-08-21 20:34:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 20:34:15,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:15,141 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] [2020-08-21 20:34:15,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 20:34:15,142 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-08-21 20:34:15,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:15,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611349026] [2020-08-21 20:34:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-21 20:34:15,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611349026] [2020-08-21 20:34:15,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:15,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:15,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391422087] [2020-08-21 20:34:15,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:15,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:15,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:15,203 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-08-21 20:34:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:15,449 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-08-21 20:34:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:15,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-08-21 20:34:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:15,454 INFO L225 Difference]: With dead ends: 1281 [2020-08-21 20:34:15,454 INFO L226 Difference]: Without dead ends: 677 [2020-08-21 20:34:15,456 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 [2020-08-21 20:34:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-21 20:34:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-21 20:34:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-21 20:34:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-08-21 20:34:15,498 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-08-21 20:34:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:15,499 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-08-21 20:34:15,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-08-21 20:34:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 20:34:15,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:15,502 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] [2020-08-21 20:34:15,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 20:34:15,503 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:15,503 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-08-21 20:34:15,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:15,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809593488] [2020-08-21 20:34:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-21 20:34:15,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809593488] [2020-08-21 20:34:15,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:15,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:15,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241834288] [2020-08-21 20:34:15,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:15,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:15,573 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-08-21 20:34:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:15,817 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-08-21 20:34:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:15,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-08-21 20:34:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:15,822 INFO L225 Difference]: With dead ends: 1313 [2020-08-21 20:34:15,822 INFO L226 Difference]: Without dead ends: 677 [2020-08-21 20:34:15,824 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 [2020-08-21 20:34:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-21 20:34:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-21 20:34:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-21 20:34:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-08-21 20:34:15,858 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-08-21 20:34:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:15,858 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-08-21 20:34:15,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-08-21 20:34:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-21 20:34:15,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:15,861 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] [2020-08-21 20:34:15,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 20:34:15,862 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-08-21 20:34:15,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:15,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843018025] [2020-08-21 20:34:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 20:34:15,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843018025] [2020-08-21 20:34:15,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:15,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:15,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659917859] [2020-08-21 20:34:15,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:15,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:15,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:15,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:15,918 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-08-21 20:34:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:16,221 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-08-21 20:34:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:16,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-08-21 20:34:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:16,227 INFO L225 Difference]: With dead ends: 1349 [2020-08-21 20:34:16,227 INFO L226 Difference]: Without dead ends: 713 [2020-08-21 20:34:16,229 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 [2020-08-21 20:34:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-21 20:34:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-08-21 20:34:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-08-21 20:34:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-08-21 20:34:16,279 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-08-21 20:34:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:16,279 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-08-21 20:34:16,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-08-21 20:34:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 20:34:16,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:16,284 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] [2020-08-21 20:34:16,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 20:34:16,284 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-08-21 20:34:16,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:16,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250613604] [2020-08-21 20:34:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:16,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 20:34:16,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250613604] [2020-08-21 20:34:16,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:16,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:16,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644099390] [2020-08-21 20:34:16,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:16,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:16,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:16,368 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-08-21 20:34:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:16,727 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-08-21 20:34:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:16,728 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-08-21 20:34:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:16,733 INFO L225 Difference]: With dead ends: 1406 [2020-08-21 20:34:16,734 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 20:34:16,736 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 [2020-08-21 20:34:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 20:34:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-08-21 20:34:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-21 20:34:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-08-21 20:34:16,842 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-08-21 20:34:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:16,843 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-08-21 20:34:16,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-08-21 20:34:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-21 20:34:16,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:16,847 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] [2020-08-21 20:34:16,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 20:34:16,847 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-08-21 20:34:16,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:16,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503617188] [2020-08-21 20:34:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:16,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-21 20:34:16,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503617188] [2020-08-21 20:34:16,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:16,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:16,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638552881] [2020-08-21 20:34:16,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:16,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:16,913 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-08-21 20:34:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:17,153 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-08-21 20:34:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:17,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-08-21 20:34:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:17,158 INFO L225 Difference]: With dead ends: 1438 [2020-08-21 20:34:17,158 INFO L226 Difference]: Without dead ends: 749 [2020-08-21 20:34:17,160 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 [2020-08-21 20:34:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-21 20:34:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-21 20:34:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-21 20:34:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-08-21 20:34:17,195 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-08-21 20:34:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:17,195 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-08-21 20:34:17,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-08-21 20:34:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 20:34:17,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:17,197 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] [2020-08-21 20:34:17,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 20:34:17,198 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:17,198 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-08-21 20:34:17,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:17,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521901738] [2020-08-21 20:34:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-21 20:34:17,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521901738] [2020-08-21 20:34:17,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:17,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:17,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432529286] [2020-08-21 20:34:17,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:17,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:17,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:17,265 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-08-21 20:34:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:17,575 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-08-21 20:34:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:17,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-08-21 20:34:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:17,584 INFO L225 Difference]: With dead ends: 1479 [2020-08-21 20:34:17,584 INFO L226 Difference]: Without dead ends: 749 [2020-08-21 20:34:17,586 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 [2020-08-21 20:34:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-21 20:34:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-21 20:34:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-21 20:34:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-08-21 20:34:17,652 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-08-21 20:34:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:17,653 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-08-21 20:34:17,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-08-21 20:34:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-21 20:34:17,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:17,657 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] [2020-08-21 20:34:17,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 20:34:17,658 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-08-21 20:34:17,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:17,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170348329] [2020-08-21 20:34:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:17,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 20:34:17,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170348329] [2020-08-21 20:34:17,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:17,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:17,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365821436] [2020-08-21 20:34:17,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:17,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:17,786 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-08-21 20:34:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:18,105 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-08-21 20:34:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:18,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-08-21 20:34:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:18,111 INFO L225 Difference]: With dead ends: 1515 [2020-08-21 20:34:18,112 INFO L226 Difference]: Without dead ends: 785 [2020-08-21 20:34:18,114 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 [2020-08-21 20:34:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-21 20:34:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-21 20:34:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-21 20:34:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-08-21 20:34:18,177 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-08-21 20:34:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:18,178 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-08-21 20:34:18,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-08-21 20:34:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 20:34:18,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:18,181 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] [2020-08-21 20:34:18,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 20:34:18,182 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-08-21 20:34:18,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:18,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307478758] [2020-08-21 20:34:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 20:34:18,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307478758] [2020-08-21 20:34:18,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:18,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:18,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361357976] [2020-08-21 20:34:18,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:18,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:18,299 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-08-21 20:34:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:18,640 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-08-21 20:34:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:18,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-08-21 20:34:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:18,645 INFO L225 Difference]: With dead ends: 1547 [2020-08-21 20:34:18,645 INFO L226 Difference]: Without dead ends: 785 [2020-08-21 20:34:18,650 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 [2020-08-21 20:34:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-21 20:34:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-21 20:34:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-21 20:34:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-08-21 20:34:18,721 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-08-21 20:34:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:18,721 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-08-21 20:34:18,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-08-21 20:34:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-21 20:34:18,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:18,726 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] [2020-08-21 20:34:18,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 20:34:18,727 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-08-21 20:34:18,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:18,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763240227] [2020-08-21 20:34:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-21 20:34:18,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763240227] [2020-08-21 20:34:18,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:18,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:18,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110677008] [2020-08-21 20:34:18,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:18,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:18,853 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-08-21 20:34:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,117 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-08-21 20:34:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:19,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-21 20:34:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,122 INFO L225 Difference]: With dead ends: 1573 [2020-08-21 20:34:19,122 INFO L226 Difference]: Without dead ends: 811 [2020-08-21 20:34:19,124 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 [2020-08-21 20:34:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-21 20:34:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-21 20:34:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-21 20:34:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-08-21 20:34:19,195 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-08-21 20:34:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,196 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-08-21 20:34:19,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-08-21 20:34:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 20:34:19,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,199 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] [2020-08-21 20:34:19,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 20:34:19,199 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-08-21 20:34:19,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118592587] [2020-08-21 20:34:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-21 20:34:19,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118592587] [2020-08-21 20:34:19,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:19,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457241062] [2020-08-21 20:34:19,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:19,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:19,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:19,261 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-08-21 20:34:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,510 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-08-21 20:34:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:19,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-08-21 20:34:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,516 INFO L225 Difference]: With dead ends: 1601 [2020-08-21 20:34:19,516 INFO L226 Difference]: Without dead ends: 811 [2020-08-21 20:34:19,519 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 [2020-08-21 20:34:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-21 20:34:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-21 20:34:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-21 20:34:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-08-21 20:34:19,575 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-08-21 20:34:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,575 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-08-21 20:34:19,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-08-21 20:34:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 20:34:19,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,580 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] [2020-08-21 20:34:19,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 20:34:19,581 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-08-21 20:34:19,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326437667] [2020-08-21 20:34:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-21 20:34:19,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326437667] [2020-08-21 20:34:19,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:19,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415158731] [2020-08-21 20:34:19,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:19,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:19,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:19,671 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-08-21 20:34:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,952 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-08-21 20:34:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:19,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 20:34:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,958 INFO L225 Difference]: With dead ends: 1656 [2020-08-21 20:34:19,958 INFO L226 Difference]: Without dead ends: 866 [2020-08-21 20:34:19,961 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 [2020-08-21 20:34:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-08-21 20:34:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-08-21 20:34:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-08-21 20:34:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-08-21 20:34:20,006 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-08-21 20:34:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,006 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-08-21 20:34:20,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-08-21 20:34:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 20:34:20,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,009 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] [2020-08-21 20:34:20,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 20:34:20,009 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-08-21 20:34:20,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394851372] [2020-08-21 20:34:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-21 20:34:20,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394851372] [2020-08-21 20:34:20,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:20,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312142018] [2020-08-21 20:34:20,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:20,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:20,090 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-08-21 20:34:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,354 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-08-21 20:34:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:20,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-08-21 20:34:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,359 INFO L225 Difference]: With dead ends: 1705 [2020-08-21 20:34:20,360 INFO L226 Difference]: Without dead ends: 850 [2020-08-21 20:34:20,362 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 [2020-08-21 20:34:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-21 20:34:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-08-21 20:34:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-21 20:34:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-08-21 20:34:20,421 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-08-21 20:34:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,422 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-08-21 20:34:20,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-08-21 20:34:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 20:34:20,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,424 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] [2020-08-21 20:34:20,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 20:34:20,425 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,425 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-08-21 20:34:20,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167822304] [2020-08-21 20:34:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-21 20:34:20,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167822304] [2020-08-21 20:34:20,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:20,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650891091] [2020-08-21 20:34:20,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:20,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:20,497 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-08-21 20:34:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,798 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-08-21 20:34:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:20,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-21 20:34:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,803 INFO L225 Difference]: With dead ends: 1671 [2020-08-21 20:34:20,804 INFO L226 Difference]: Without dead ends: 848 [2020-08-21 20:34:20,807 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 [2020-08-21 20:34:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-08-21 20:34:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-08-21 20:34:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-21 20:34:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-08-21 20:34:20,858 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-08-21 20:34:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,859 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-08-21 20:34:20,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-08-21 20:34:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 20:34:20,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,862 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] [2020-08-21 20:34:20,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 20:34:20,862 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-08-21 20:34:20,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668336842] [2020-08-21 20:34:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-21 20:34:20,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668336842] [2020-08-21 20:34:20,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:34:20,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338057862] [2020-08-21 20:34:20,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:34:20,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:34:20,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:34:20,956 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-08-21 20:34:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:21,284 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-08-21 20:34:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:34:21,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 20:34:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:21,291 INFO L225 Difference]: With dead ends: 1671 [2020-08-21 20:34:21,291 INFO L226 Difference]: Without dead ends: 831 [2020-08-21 20:34:21,296 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 [2020-08-21 20:34:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-21 20:34:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-08-21 20:34:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-08-21 20:34:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-08-21 20:34:21,379 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-08-21 20:34:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:21,379 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-08-21 20:34:21,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:34:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-08-21 20:34:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 20:34:21,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:21,383 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] [2020-08-21 20:34:21,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 20:34:21,383 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-08-21 20:34:21,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:21,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996946636] [2020-08-21 20:34:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:21,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-21 20:34:21,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996946636] [2020-08-21 20:34:21,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:21,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:21,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833769876] [2020-08-21 20:34:21,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:21,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:21,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:21,453 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-08-21 20:34:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:21,549 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-08-21 20:34:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:21,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-21 20:34:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:21,558 INFO L225 Difference]: With dead ends: 2417 [2020-08-21 20:34:21,559 INFO L226 Difference]: Without dead ends: 1611 [2020-08-21 20:34:21,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-08-21 20:34:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-08-21 20:34:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-08-21 20:34:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-08-21 20:34:21,620 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-08-21 20:34:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:21,621 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-08-21 20:34:21,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-08-21 20:34:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 20:34:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:21,623 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] [2020-08-21 20:34:21,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 20:34:21,624 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-08-21 20:34:21,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:21,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775468365] [2020-08-21 20:34:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:21,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-08-21 20:34:21,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775468365] [2020-08-21 20:34:21,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:21,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:21,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348017841] [2020-08-21 20:34:21,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:21,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:21,708 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-08-21 20:34:21,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:21,808 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-08-21 20:34:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:21,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-21 20:34:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:21,817 INFO L225 Difference]: With dead ends: 2416 [2020-08-21 20:34:21,817 INFO L226 Difference]: Without dead ends: 1608 [2020-08-21 20:34:21,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-08-21 20:34:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-08-21 20:34:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-21 20:34:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-08-21 20:34:21,926 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-08-21 20:34:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:21,927 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-08-21 20:34:21,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-08-21 20:34:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-21 20:34:21,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:21,930 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] [2020-08-21 20:34:21,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 20:34:21,930 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-08-21 20:34:21,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:21,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448759787] [2020-08-21 20:34:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-21 20:34:22,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448759787] [2020-08-21 20:34:22,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:22,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:22,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129016021] [2020-08-21 20:34:22,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:22,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:22,111 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-08-21 20:34:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:22,336 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-08-21 20:34:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:22,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-08-21 20:34:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:22,352 INFO L225 Difference]: With dead ends: 4752 [2020-08-21 20:34:22,352 INFO L226 Difference]: Without dead ends: 3159 [2020-08-21 20:34:22,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-08-21 20:34:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-08-21 20:34:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-21 20:34:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-08-21 20:34:22,501 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-08-21 20:34:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:22,502 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-08-21 20:34:22,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-08-21 20:34:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-21 20:34:22,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:22,506 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] [2020-08-21 20:34:22,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 20:34:22,506 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-08-21 20:34:22,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:22,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472407161] [2020-08-21 20:34:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:22,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 20:34:22,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472407161] [2020-08-21 20:34:22,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:22,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:22,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251024594] [2020-08-21 20:34:22,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:22,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:22,590 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-08-21 20:34:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:22,922 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-08-21 20:34:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:22,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-08-21 20:34:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:22,938 INFO L225 Difference]: With dead ends: 4792 [2020-08-21 20:34:22,939 INFO L226 Difference]: Without dead ends: 3199 [2020-08-21 20:34:22,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-08-21 20:34:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-08-21 20:34:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-08-21 20:34:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-08-21 20:34:23,270 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-08-21 20:34:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:23,270 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-08-21 20:34:23,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-08-21 20:34:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-21 20:34:23,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:23,274 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] [2020-08-21 20:34:23,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 20:34:23,274 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-08-21 20:34:23,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:23,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296873897] [2020-08-21 20:34:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:34:23,317 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:34:23,318 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:34:23,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 20:34:23,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:34:23 BoogieIcfgContainer [2020-08-21 20:34:23,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:34:23,363 INFO L168 Benchmark]: Toolchain (without parser) took 15850.65 ms. Allocated memory was 145.8 MB in the beginning and 483.9 MB in the end (delta: 338.2 MB). Free memory was 100.9 MB in the beginning and 322.5 MB in the end (delta: -221.6 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:23,363 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:34:23,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.09 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 100.7 MB in the beginning and 177.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:23,364 INFO L168 Benchmark]: Boogie Preprocessor took 60.04 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 174.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:23,364 INFO L168 Benchmark]: RCFGBuilder took 890.23 ms. Allocated memory is still 202.9 MB. Free memory was 174.4 MB in the beginning and 116.0 MB in the end (delta: 58.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:23,364 INFO L168 Benchmark]: TraceAbstraction took 14357.02 ms. Allocated memory was 202.9 MB in the beginning and 483.9 MB in the end (delta: 281.0 MB). Free memory was 116.0 MB in the beginning and 322.5 MB in the end (delta: -206.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:23,368 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 538.09 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 100.7 MB in the beginning and 177.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.04 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 174.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 890.23 ms. Allocated memory is still 202.9 MB. Free memory was 174.4 MB in the beginning and 116.0 MB in the end (delta: 58.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14357.02 ms. Allocated memory was 202.9 MB in the beginning and 483.9 MB in the end (delta: 281.0 MB). Free memory was 116.0 MB in the beginning and 322.5 MB in the end (delta: -206.5 MB). Peak memory consumption was 74.5 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: 14.2s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.0s, 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, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s 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: 1.8s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.6s 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...