/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=SHALLOWEST --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 19:45:40,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:45:40,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:45:40,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:45:40,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:45:40,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:45:40,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:45:40,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:45:40,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:45:40,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:45:40,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:45:40,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:45:40,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:45:40,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:45:40,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:45:40,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:45:40,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:45:40,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:45:40,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:45:40,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:45:40,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:45:40,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:45:40,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:45:40,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:45:40,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:45:40,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:45:40,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:45:40,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:45:40,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:45:40,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:45:40,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:45:40,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:45:40,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:45:40,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:45:40,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:45:40,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:45:40,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:45:40,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:45:40,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:45:40,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:45:40,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:45:40,150 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 19:45:40,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:45:40,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:45:40,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:45:40,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:45:40,199 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:45:40,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:45:40,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:45:40,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:45:40,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:45:40,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:45:40,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:45:40,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:45:40,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:45:40,206 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:45:40,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:45:40,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:45:40,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:45:40,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:45:40,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:45:40,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:45:40,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:45:40,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:40,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:45:40,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:45:40,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:45:40,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:45:40,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:45:40,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:45:40,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:45:40,211 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:45:40,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:45:40,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:45:40,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:45:40,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:45:40,537 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:45:40,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-21 19:45:40,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a84600878/d9d9eb067aa94f2ebed66472345833a7/FLAG3797fe00f [2020-08-21 19:45:41,140 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:45:41,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-21 19:45:41,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a84600878/d9d9eb067aa94f2ebed66472345833a7/FLAG3797fe00f [2020-08-21 19:45:41,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a84600878/d9d9eb067aa94f2ebed66472345833a7 [2020-08-21 19:45:41,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:45:41,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:45:41,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:41,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:45:41,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:45:41,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:41" (1/1) ... [2020-08-21 19:45:41,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321fecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:41, skipping insertion in model container [2020-08-21 19:45:41,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:41" (1/1) ... [2020-08-21 19:45:41,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:45:41,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:45:41,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:41,866 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:45:42,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:42,065 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:45:42,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42 WrapperNode [2020-08-21 19:45:42,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:42,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:45:42,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:45:42,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:45:42,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (1/1) ... [2020-08-21 19:45:42,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:45:42,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:45:42,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:45:42,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:45:42,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (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 19:45:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:45:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:45:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 19:45:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:45:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:45:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 19:45:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:45:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 19:45:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 19:45:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 19:45:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:45:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:45:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:45:42,433 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 19:45:42,932 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 19:45:42,932 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 19:45:42,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:45:42,944 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:45:42,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:42 BoogieIcfgContainer [2020-08-21 19:45:42,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:45:42,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:45:42,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:45:42,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:45:42,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:45:41" (1/3) ... [2020-08-21 19:45:42,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17be698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:42, skipping insertion in model container [2020-08-21 19:45:42,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:42" (2/3) ... [2020-08-21 19:45:42,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17be698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:42, skipping insertion in model container [2020-08-21 19:45:42,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:42" (3/3) ... [2020-08-21 19:45:42,959 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-08-21 19:45:42,970 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:45:42,978 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:45:42,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:45:43,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:45:43,019 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:45:43,020 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:45:43,020 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:45:43,020 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:45:43,020 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:45:43,020 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:45:43,020 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:45:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-21 19:45:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 19:45:43,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:43,054 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 19:45:43,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-08-21 19:45:43,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:43,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152116124] [2020-08-21 19:45:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:43,354 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 19:45:43,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152116124] [2020-08-21 19:45:43,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:43,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:43,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93699569] [2020-08-21 19:45:43,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:43,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:43,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:43,382 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-08-21 19:45:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:43,746 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-08-21 19:45:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:43,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 19:45:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:43,764 INFO L225 Difference]: With dead ends: 362 [2020-08-21 19:45:43,764 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 19:45:43,769 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 19:45:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 19:45:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-08-21 19:45:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-21 19:45:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-08-21 19:45:43,827 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-08-21 19:45:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:43,827 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-08-21 19:45:43,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-08-21 19:45:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 19:45:43,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:43,830 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 19:45:43,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:45:43,831 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-08-21 19:45:43,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:43,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94633356] [2020-08-21 19:45:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:43,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:43,935 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 19:45:43,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94633356] [2020-08-21 19:45:43,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:43,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:43,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488209804] [2020-08-21 19:45:43,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:43,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:43,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:43,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:43,939 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-08-21 19:45:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:44,161 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-08-21 19:45:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:44,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-21 19:45:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:44,164 INFO L225 Difference]: With dead ends: 363 [2020-08-21 19:45:44,164 INFO L226 Difference]: Without dead ends: 199 [2020-08-21 19:45:44,166 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 19:45:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-21 19:45:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-08-21 19:45:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-21 19:45:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-08-21 19:45:44,186 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-08-21 19:45:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:44,187 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-08-21 19:45:44,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-08-21 19:45:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 19:45:44,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:44,189 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 19:45:44,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:45:44,189 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-08-21 19:45:44,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:44,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876128668] [2020-08-21 19:45:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,327 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 19:45:44,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876128668] [2020-08-21 19:45:44,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:44,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:44,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840407249] [2020-08-21 19:45:44,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:44,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:44,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:44,333 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-08-21 19:45:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:44,590 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-08-21 19:45:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:44,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-21 19:45:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:44,593 INFO L225 Difference]: With dead ends: 393 [2020-08-21 19:45:44,593 INFO L226 Difference]: Without dead ends: 207 [2020-08-21 19:45:44,595 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 19:45:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-21 19:45:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-08-21 19:45:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-21 19:45:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-08-21 19:45:44,641 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-08-21 19:45:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:44,642 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-08-21 19:45:44,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-08-21 19:45:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 19:45:44,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:44,644 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 19:45:44,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:45:44,644 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-08-21 19:45:44,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:44,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348467263] [2020-08-21 19:45:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:44,745 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 19:45:44,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348467263] [2020-08-21 19:45:44,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:44,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:44,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75099673] [2020-08-21 19:45:44,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:44,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:44,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:44,747 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-08-21 19:45:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:44,965 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-08-21 19:45:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:44,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-21 19:45:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:44,968 INFO L225 Difference]: With dead ends: 398 [2020-08-21 19:45:44,968 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 19:45:44,969 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 19:45:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 19:45:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 19:45:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 19:45:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-08-21 19:45:44,983 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-08-21 19:45:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:44,984 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-08-21 19:45:44,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-08-21 19:45:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 19:45:44,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:44,986 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 19:45:44,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:45:44,987 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-08-21 19:45:44,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:44,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2709212] [2020-08-21 19:45:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,072 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 19:45:45,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2709212] [2020-08-21 19:45:45,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:45,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217683091] [2020-08-21 19:45:45,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:45,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:45,075 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-08-21 19:45:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,265 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-08-21 19:45:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:45,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-21 19:45:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,267 INFO L225 Difference]: With dead ends: 409 [2020-08-21 19:45:45,267 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 19:45:45,268 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 19:45:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 19:45:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-21 19:45:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 19:45:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-08-21 19:45:45,283 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-08-21 19:45:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,285 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-08-21 19:45:45,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-08-21 19:45:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 19:45:45,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,292 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 19:45:45,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:45:45,293 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-08-21 19:45:45,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:45,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015588657] [2020-08-21 19:45:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,352 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 19:45:45,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015588657] [2020-08-21 19:45:45,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:45,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500081069] [2020-08-21 19:45:45,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:45,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:45,355 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-08-21 19:45:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,542 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-08-21 19:45:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:45,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-21 19:45:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,545 INFO L225 Difference]: With dead ends: 409 [2020-08-21 19:45:45,545 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 19:45:45,546 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 19:45:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 19:45:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-21 19:45:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 19:45:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-08-21 19:45:45,557 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-08-21 19:45:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,557 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-08-21 19:45:45,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-08-21 19:45:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 19:45:45,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,559 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 19:45:45,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:45:45,559 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-08-21 19:45:45,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:45,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414574033] [2020-08-21 19:45:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,613 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 19:45:45,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414574033] [2020-08-21 19:45:45,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:45,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117779483] [2020-08-21 19:45:45,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:45,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:45,615 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-08-21 19:45:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:45,808 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-08-21 19:45:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:45,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-08-21 19:45:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:45,810 INFO L225 Difference]: With dead ends: 409 [2020-08-21 19:45:45,810 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 19:45:45,811 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 19:45:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 19:45:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-21 19:45:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 19:45:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-08-21 19:45:45,823 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-08-21 19:45:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:45,824 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-08-21 19:45:45,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-08-21 19:45:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 19:45:45,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:45,825 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 19:45:45,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:45:45,826 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-08-21 19:45:45,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:45,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723241624] [2020-08-21 19:45:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:45,884 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 19:45:45,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723241624] [2020-08-21 19:45:45,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:45,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:45:45,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276181938] [2020-08-21 19:45:45,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:45:45,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:45,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:45:45,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:45:45,887 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-08-21 19:45:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,228 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-08-21 19:45:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:45:46,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-21 19:45:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,233 INFO L225 Difference]: With dead ends: 605 [2020-08-21 19:45:46,233 INFO L226 Difference]: Without dead ends: 412 [2020-08-21 19:45:46,234 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 19:45:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-21 19:45:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-08-21 19:45:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-21 19:45:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-08-21 19:45:46,260 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-08-21 19:45:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,260 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-08-21 19:45:46,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:45:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-08-21 19:45:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 19:45:46,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,262 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 19:45:46,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:45:46,263 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-08-21 19:45:46,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965110790] [2020-08-21 19:45:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,333 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 19:45:46,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965110790] [2020-08-21 19:45:46,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:46,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831553732] [2020-08-21 19:45:46,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:46,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:46,341 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-08-21 19:45:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,581 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-08-21 19:45:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:46,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-21 19:45:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,590 INFO L225 Difference]: With dead ends: 847 [2020-08-21 19:45:46,590 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 19:45:46,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:45:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 19:45:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-08-21 19:45:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-21 19:45:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-08-21 19:45:46,618 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-08-21 19:45:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,619 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-08-21 19:45:46,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-08-21 19:45:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 19:45:46,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,622 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 19:45:46,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:45:46,623 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-08-21 19:45:46,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751090822] [2020-08-21 19:45:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:46,706 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 19:45:46,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751090822] [2020-08-21 19:45:46,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:46,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:46,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401010817] [2020-08-21 19:45:46,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:46,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:46,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:46,709 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-08-21 19:45:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:46,955 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-08-21 19:45:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:46,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-21 19:45:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:46,959 INFO L225 Difference]: With dead ends: 936 [2020-08-21 19:45:46,959 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 19:45:46,961 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 19:45:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 19:45:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-08-21 19:45:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-08-21 19:45:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-08-21 19:45:46,989 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-08-21 19:45:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:46,991 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-08-21 19:45:46,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-08-21 19:45:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:45:46,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:46,993 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 19:45:46,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:45:46,994 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-08-21 19:45:46,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:46,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407885262] [2020-08-21 19:45:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,087 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 19:45:47,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407885262] [2020-08-21 19:45:47,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:47,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:47,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808542658] [2020-08-21 19:45:47,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:47,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:47,089 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-08-21 19:45:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:47,314 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-08-21 19:45:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:47,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-21 19:45:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:47,318 INFO L225 Difference]: With dead ends: 993 [2020-08-21 19:45:47,318 INFO L226 Difference]: Without dead ends: 529 [2020-08-21 19:45:47,320 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 19:45:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-21 19:45:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-21 19:45:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-21 19:45:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-08-21 19:45:47,343 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-08-21 19:45:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:47,344 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-08-21 19:45:47,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-08-21 19:45:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 19:45:47,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:47,346 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 19:45:47,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:45:47,346 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:47,347 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-08-21 19:45:47,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:47,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405115889] [2020-08-21 19:45:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,400 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 19:45:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405115889] [2020-08-21 19:45:47,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:47,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:47,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989319913] [2020-08-21 19:45:47,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:47,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:47,402 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-08-21 19:45:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:47,644 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-08-21 19:45:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:47,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-21 19:45:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:47,649 INFO L225 Difference]: With dead ends: 1027 [2020-08-21 19:45:47,649 INFO L226 Difference]: Without dead ends: 529 [2020-08-21 19:45:47,650 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 19:45:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-21 19:45:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-21 19:45:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-21 19:45:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-08-21 19:45:47,675 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-08-21 19:45:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:47,676 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-08-21 19:45:47,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-08-21 19:45:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 19:45:47,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:47,677 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 19:45:47,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:45:47,678 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:47,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-08-21 19:45:47,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:47,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526367595] [2020-08-21 19:45:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:47,731 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 19:45:47,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526367595] [2020-08-21 19:45:47,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:47,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:47,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497694289] [2020-08-21 19:45:47,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:47,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:47,733 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-08-21 19:45:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:48,008 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-08-21 19:45:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:48,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-21 19:45:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:48,013 INFO L225 Difference]: With dead ends: 1074 [2020-08-21 19:45:48,013 INFO L226 Difference]: Without dead ends: 576 [2020-08-21 19:45:48,015 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 19:45:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-08-21 19:45:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-08-21 19:45:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-21 19:45:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-08-21 19:45:48,042 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-08-21 19:45:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:48,044 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-08-21 19:45:48,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-08-21 19:45:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 19:45:48,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:48,046 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 19:45:48,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:45:48,046 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:48,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:48,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-08-21 19:45:48,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:48,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008316637] [2020-08-21 19:45:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,147 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 19:45:48,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008316637] [2020-08-21 19:45:48,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:48,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:48,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15841488] [2020-08-21 19:45:48,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:48,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:48,149 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-08-21 19:45:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:48,373 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-08-21 19:45:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:48,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-08-21 19:45:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:48,377 INFO L225 Difference]: With dead ends: 1184 [2020-08-21 19:45:48,377 INFO L226 Difference]: Without dead ends: 623 [2020-08-21 19:45:48,379 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 19:45:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-21 19:45:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-21 19:45:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-21 19:45:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-08-21 19:45:48,405 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-08-21 19:45:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:48,406 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-08-21 19:45:48,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-08-21 19:45:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 19:45:48,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:48,408 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 19:45:48,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:45:48,408 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:48,408 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-08-21 19:45:48,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:48,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787554378] [2020-08-21 19:45:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,460 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 19:45:48,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787554378] [2020-08-21 19:45:48,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:48,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:48,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722992821] [2020-08-21 19:45:48,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:48,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:48,462 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-08-21 19:45:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:48,684 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-08-21 19:45:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:48,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-21 19:45:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:48,689 INFO L225 Difference]: With dead ends: 1227 [2020-08-21 19:45:48,689 INFO L226 Difference]: Without dead ends: 623 [2020-08-21 19:45:48,691 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 19:45:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-21 19:45:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-21 19:45:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-21 19:45:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-08-21 19:45:48,733 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-08-21 19:45:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:48,734 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-08-21 19:45:48,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-08-21 19:45:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 19:45:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:48,736 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 19:45:48,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 19:45:48,736 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-08-21 19:45:48,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:48,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295512550] [2020-08-21 19:45:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:48,786 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 19:45:48,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295512550] [2020-08-21 19:45:48,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:48,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:48,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10518088] [2020-08-21 19:45:48,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:48,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:48,788 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-08-21 19:45:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:49,004 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-08-21 19:45:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:49,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-08-21 19:45:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:49,008 INFO L225 Difference]: With dead ends: 1223 [2020-08-21 19:45:49,008 INFO L226 Difference]: Without dead ends: 619 [2020-08-21 19:45:49,009 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 19:45:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-08-21 19:45:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-08-21 19:45:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-21 19:45:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-08-21 19:45:49,037 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-08-21 19:45:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:49,037 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-08-21 19:45:49,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-08-21 19:45:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 19:45:49,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,039 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 19:45:49,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 19:45:49,040 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-08-21 19:45:49,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469492307] [2020-08-21 19:45:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,089 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 19:45:49,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469492307] [2020-08-21 19:45:49,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:49,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:49,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899261701] [2020-08-21 19:45:49,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:49,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:49,091 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-08-21 19:45:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:49,297 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-08-21 19:45:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:49,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-08-21 19:45:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:49,302 INFO L225 Difference]: With dead ends: 1281 [2020-08-21 19:45:49,302 INFO L226 Difference]: Without dead ends: 677 [2020-08-21 19:45:49,303 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 19:45:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-21 19:45:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-21 19:45:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-21 19:45:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-08-21 19:45:49,334 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-08-21 19:45:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:49,334 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-08-21 19:45:49,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-08-21 19:45:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 19:45:49,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,336 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 19:45:49,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 19:45:49,337 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-08-21 19:45:49,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600573159] [2020-08-21 19:45:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,403 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 19:45:49,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600573159] [2020-08-21 19:45:49,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:49,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:49,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608983923] [2020-08-21 19:45:49,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:49,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:49,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:49,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:49,405 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-08-21 19:45:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:49,675 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-08-21 19:45:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:49,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-08-21 19:45:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:49,681 INFO L225 Difference]: With dead ends: 1313 [2020-08-21 19:45:49,681 INFO L226 Difference]: Without dead ends: 677 [2020-08-21 19:45:49,683 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 19:45:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-21 19:45:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-21 19:45:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-21 19:45:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-08-21 19:45:49,725 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-08-21 19:45:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:49,725 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-08-21 19:45:49,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-08-21 19:45:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-21 19:45:49,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,728 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 19:45:49,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 19:45:49,729 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-08-21 19:45:49,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803563465] [2020-08-21 19:45:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,842 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 19:45:49,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803563465] [2020-08-21 19:45:49,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:49,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:49,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102982045] [2020-08-21 19:45:49,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:49,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:49,847 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-08-21 19:45:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,180 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-08-21 19:45:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:50,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-08-21 19:45:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,185 INFO L225 Difference]: With dead ends: 1349 [2020-08-21 19:45:50,185 INFO L226 Difference]: Without dead ends: 713 [2020-08-21 19:45:50,187 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 19:45:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-21 19:45:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-08-21 19:45:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-08-21 19:45:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-08-21 19:45:50,227 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-08-21 19:45:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,227 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-08-21 19:45:50,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-08-21 19:45:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 19:45:50,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,230 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 19:45:50,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 19:45:50,230 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-08-21 19:45:50,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178997923] [2020-08-21 19:45:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,288 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 19:45:50,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178997923] [2020-08-21 19:45:50,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:50,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146302416] [2020-08-21 19:45:50,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:50,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:50,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:50,290 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-08-21 19:45:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,567 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-08-21 19:45:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:50,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-08-21 19:45:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,571 INFO L225 Difference]: With dead ends: 1406 [2020-08-21 19:45:50,572 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 19:45:50,573 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 19:45:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 19:45:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-08-21 19:45:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-21 19:45:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-08-21 19:45:50,619 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-08-21 19:45:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,619 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-08-21 19:45:50,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-08-21 19:45:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-21 19:45:50,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,621 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 19:45:50,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 19:45:50,622 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-08-21 19:45:50,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641045185] [2020-08-21 19:45:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,693 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 19:45:50,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641045185] [2020-08-21 19:45:50,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:50,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55162551] [2020-08-21 19:45:50,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:50,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:50,696 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-08-21 19:45:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,945 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-08-21 19:45:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:50,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-08-21 19:45:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,949 INFO L225 Difference]: With dead ends: 1438 [2020-08-21 19:45:50,949 INFO L226 Difference]: Without dead ends: 749 [2020-08-21 19:45:50,953 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 19:45:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-21 19:45:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-21 19:45:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-21 19:45:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-08-21 19:45:50,991 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-08-21 19:45:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,991 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-08-21 19:45:50,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-08-21 19:45:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 19:45:50,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,994 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 19:45:50,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 19:45:50,994 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-08-21 19:45:50,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503522437] [2020-08-21 19:45:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,061 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 19:45:51,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503522437] [2020-08-21 19:45:51,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:51,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:51,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156885710] [2020-08-21 19:45:51,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:51,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:51,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:51,064 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-08-21 19:45:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:51,363 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-08-21 19:45:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:51,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-08-21 19:45:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:51,371 INFO L225 Difference]: With dead ends: 1479 [2020-08-21 19:45:51,371 INFO L226 Difference]: Without dead ends: 749 [2020-08-21 19:45:51,374 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 19:45:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-21 19:45:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-21 19:45:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-21 19:45:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-08-21 19:45:51,491 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-08-21 19:45:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:51,491 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-08-21 19:45:51,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-08-21 19:45:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-21 19:45:51,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:51,498 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 19:45:51,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 19:45:51,499 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-08-21 19:45:51,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:51,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740588938] [2020-08-21 19:45:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,606 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 19:45:51,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740588938] [2020-08-21 19:45:51,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:51,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:51,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107730565] [2020-08-21 19:45:51,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:51,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:51,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:51,621 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-08-21 19:45:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:51,918 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-08-21 19:45:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:51,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-08-21 19:45:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:51,924 INFO L225 Difference]: With dead ends: 1515 [2020-08-21 19:45:51,924 INFO L226 Difference]: Without dead ends: 785 [2020-08-21 19:45:51,927 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 19:45:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-21 19:45:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-21 19:45:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-21 19:45:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-08-21 19:45:51,983 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-08-21 19:45:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:51,984 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-08-21 19:45:51,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-08-21 19:45:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 19:45:51,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:51,988 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 19:45:51,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 19:45:51,989 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-08-21 19:45:51,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:51,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38038023] [2020-08-21 19:45:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:52,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:52,103 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 19:45:52,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38038023] [2020-08-21 19:45:52,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:52,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:52,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035795941] [2020-08-21 19:45:52,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:52,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:52,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:52,106 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-08-21 19:45:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:52,429 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-08-21 19:45:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:52,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-08-21 19:45:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:52,436 INFO L225 Difference]: With dead ends: 1547 [2020-08-21 19:45:52,436 INFO L226 Difference]: Without dead ends: 785 [2020-08-21 19:45:52,438 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 19:45:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-21 19:45:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-21 19:45:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-21 19:45:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-08-21 19:45:52,507 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-08-21 19:45:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:52,507 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-08-21 19:45:52,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-08-21 19:45:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-21 19:45:52,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:52,512 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 19:45:52,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 19:45:52,512 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-08-21 19:45:52,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:52,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211808591] [2020-08-21 19:45:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:52,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:52,588 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 19:45:52,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211808591] [2020-08-21 19:45:52,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:52,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:52,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777442033] [2020-08-21 19:45:52,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:52,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:52,591 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-08-21 19:45:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:52,819 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-08-21 19:45:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:52,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-21 19:45:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:52,824 INFO L225 Difference]: With dead ends: 1573 [2020-08-21 19:45:52,824 INFO L226 Difference]: Without dead ends: 811 [2020-08-21 19:45:52,826 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 19:45:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-21 19:45:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-21 19:45:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-21 19:45:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-08-21 19:45:52,871 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-08-21 19:45:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:52,871 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-08-21 19:45:52,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-08-21 19:45:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 19:45:52,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:52,876 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 19:45:52,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 19:45:52,877 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-08-21 19:45:52,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:52,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557470529] [2020-08-21 19:45:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:52,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:52,950 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 19:45:52,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557470529] [2020-08-21 19:45:52,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:52,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:52,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748742048] [2020-08-21 19:45:52,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:52,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:52,954 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-08-21 19:45:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:53,176 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-08-21 19:45:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:53,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-08-21 19:45:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:53,180 INFO L225 Difference]: With dead ends: 1601 [2020-08-21 19:45:53,181 INFO L226 Difference]: Without dead ends: 811 [2020-08-21 19:45:53,182 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 19:45:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-21 19:45:53,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-21 19:45:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-21 19:45:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-08-21 19:45:53,226 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-08-21 19:45:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:53,226 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-08-21 19:45:53,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-08-21 19:45:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 19:45:53,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:53,229 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 19:45:53,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 19:45:53,229 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-08-21 19:45:53,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:53,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780173844] [2020-08-21 19:45:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,299 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 19:45:53,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780173844] [2020-08-21 19:45:53,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:53,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:53,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849409714] [2020-08-21 19:45:53,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:53,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:53,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:53,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:53,301 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-08-21 19:45:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:53,617 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-08-21 19:45:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:53,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 19:45:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:53,623 INFO L225 Difference]: With dead ends: 1656 [2020-08-21 19:45:53,623 INFO L226 Difference]: Without dead ends: 866 [2020-08-21 19:45:53,625 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 19:45:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-08-21 19:45:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-08-21 19:45:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-08-21 19:45:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-08-21 19:45:53,681 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-08-21 19:45:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:53,681 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-08-21 19:45:53,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-08-21 19:45:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 19:45:53,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:53,685 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 19:45:53,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 19:45:53,685 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-08-21 19:45:53,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:53,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434397322] [2020-08-21 19:45:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,752 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 19:45:53,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434397322] [2020-08-21 19:45:53,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:53,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:53,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245766160] [2020-08-21 19:45:53,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:53,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:53,755 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-08-21 19:45:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,003 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-08-21 19:45:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:54,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-08-21 19:45:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,008 INFO L225 Difference]: With dead ends: 1705 [2020-08-21 19:45:54,008 INFO L226 Difference]: Without dead ends: 850 [2020-08-21 19:45:54,010 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 19:45:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-21 19:45:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-08-21 19:45:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-21 19:45:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-08-21 19:45:54,063 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-08-21 19:45:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,063 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-08-21 19:45:54,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-08-21 19:45:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 19:45:54,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,066 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 19:45:54,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 19:45:54,066 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-08-21 19:45:54,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276580959] [2020-08-21 19:45:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,132 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 19:45:54,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276580959] [2020-08-21 19:45:54,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:54,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099575535] [2020-08-21 19:45:54,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:54,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:54,135 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-08-21 19:45:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,366 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-08-21 19:45:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:54,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-21 19:45:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,373 INFO L225 Difference]: With dead ends: 1671 [2020-08-21 19:45:54,373 INFO L226 Difference]: Without dead ends: 848 [2020-08-21 19:45:54,377 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 19:45:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-08-21 19:45:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-08-21 19:45:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-21 19:45:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-08-21 19:45:54,445 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-08-21 19:45:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,445 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-08-21 19:45:54,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-08-21 19:45:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 19:45:54,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,450 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 19:45:54,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 19:45:54,451 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-08-21 19:45:54,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918240286] [2020-08-21 19:45:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,618 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 19:45:54,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918240286] [2020-08-21 19:45:54,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:54,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946619401] [2020-08-21 19:45:54,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:54,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:54,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:54,621 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-08-21 19:45:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,943 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-08-21 19:45:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:54,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 19:45:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,949 INFO L225 Difference]: With dead ends: 1671 [2020-08-21 19:45:54,949 INFO L226 Difference]: Without dead ends: 831 [2020-08-21 19:45:54,955 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 19:45:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-21 19:45:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-08-21 19:45:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-08-21 19:45:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-08-21 19:45:55,017 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-08-21 19:45:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,017 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-08-21 19:45:55,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-08-21 19:45:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 19:45:55,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,020 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 19:45:55,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 19:45:55,020 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-08-21 19:45:55,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306794089] [2020-08-21 19:45:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,104 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 19:45:55,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306794089] [2020-08-21 19:45:55,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665067994] [2020-08-21 19:45:55,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,106 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-08-21 19:45:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,199 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-08-21 19:45:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-21 19:45:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,207 INFO L225 Difference]: With dead ends: 2417 [2020-08-21 19:45:55,207 INFO L226 Difference]: Without dead ends: 1611 [2020-08-21 19:45:55,210 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 19:45:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-08-21 19:45:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-08-21 19:45:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-08-21 19:45:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-08-21 19:45:55,267 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-08-21 19:45:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,267 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-08-21 19:45:55,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-08-21 19:45:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 19:45:55,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,270 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 19:45:55,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 19:45:55,270 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-08-21 19:45:55,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301872651] [2020-08-21 19:45:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,360 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 19:45:55,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301872651] [2020-08-21 19:45:55,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722194204] [2020-08-21 19:45:55,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,362 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-08-21 19:45:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,483 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-08-21 19:45:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-21 19:45:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,491 INFO L225 Difference]: With dead ends: 2416 [2020-08-21 19:45:55,491 INFO L226 Difference]: Without dead ends: 1608 [2020-08-21 19:45:55,494 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 19:45:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-08-21 19:45:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-08-21 19:45:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-21 19:45:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-08-21 19:45:55,582 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-08-21 19:45:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,583 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-08-21 19:45:55,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-08-21 19:45:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-21 19:45:55,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,586 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 19:45:55,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 19:45:55,586 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-08-21 19:45:55,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966800027] [2020-08-21 19:45:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,699 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 19:45:55,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966800027] [2020-08-21 19:45:55,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55475305] [2020-08-21 19:45:55,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,701 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-08-21 19:45:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,934 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-08-21 19:45:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-08-21 19:45:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,948 INFO L225 Difference]: With dead ends: 4752 [2020-08-21 19:45:55,949 INFO L226 Difference]: Without dead ends: 3159 [2020-08-21 19:45:55,954 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 19:45:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-08-21 19:45:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-08-21 19:45:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-21 19:45:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-08-21 19:45:56,067 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-08-21 19:45:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,068 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-08-21 19:45:56,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-08-21 19:45:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-21 19:45:56,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,072 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 19:45:56,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 19:45:56,073 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-08-21 19:45:56,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941373512] [2020-08-21 19:45:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,185 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 19:45:56,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941373512] [2020-08-21 19:45:56,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041654325] [2020-08-21 19:45:56,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,188 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-08-21 19:45:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,521 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-08-21 19:45:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-08-21 19:45:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,535 INFO L225 Difference]: With dead ends: 4792 [2020-08-21 19:45:56,536 INFO L226 Difference]: Without dead ends: 3199 [2020-08-21 19:45:56,539 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 19:45:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-08-21 19:45:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-08-21 19:45:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-08-21 19:45:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-08-21 19:45:56,756 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-08-21 19:45:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,757 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-08-21 19:45:56,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-08-21 19:45:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-21 19:45:56,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,763 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 19:45:56,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 19:45:56,763 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-08-21 19:45:56,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642441985] [2020-08-21 19:45:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:45:56,810 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:45:56,810 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:45:56,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 19:45:56,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:45:56 BoogieIcfgContainer [2020-08-21 19:45:56,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:45:56,849 INFO L168 Benchmark]: Toolchain (without parser) took 15375.84 ms. Allocated memory was 140.5 MB in the beginning and 480.8 MB in the end (delta: 340.3 MB). Free memory was 102.7 MB in the beginning and 241.2 MB in the end (delta: -138.5 MB). Peak memory consumption was 201.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,850 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,850 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.93 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 178.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,851 INFO L168 Benchmark]: Boogie Preprocessor took 72.48 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 175.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,851 INFO L168 Benchmark]: RCFGBuilder took 810.09 ms. Allocated memory is still 203.9 MB. Free memory was 175.2 MB in the beginning and 117.7 MB in the end (delta: 57.5 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,851 INFO L168 Benchmark]: TraceAbstraction took 13896.03 ms. Allocated memory was 203.9 MB in the beginning and 480.8 MB in the end (delta: 276.8 MB). Free memory was 117.1 MB in the beginning and 241.2 MB in the end (delta: -124.1 MB). Peak memory consumption was 152.7 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,853 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 591.93 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 178.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.48 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 175.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 810.09 ms. Allocated memory is still 203.9 MB. Free memory was 175.2 MB in the beginning and 117.7 MB in the end (delta: 57.5 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13896.03 ms. Allocated memory was 203.9 MB in the beginning and 480.8 MB in the end (delta: 276.8 MB). Free memory was 117.1 MB in the beginning and 241.2 MB in the end (delta: -124.1 MB). Peak memory consumption was 152.7 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: 13.7s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 8.7s, 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, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3197occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.7s 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...