/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 -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 0.1.25-86f66a4 [2020-07-07 11:15:16,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:15:16,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:15:16,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:15:16,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:15:16,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:15:16,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:15:16,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:15:16,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:15:16,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:15:16,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:15:16,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:15:16,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:15:16,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:15:16,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:15:16,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:15:16,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:15:16,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:15:16,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:15:16,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:15:16,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:15:16,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:15:16,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:15:16,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:15:16,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:15:16,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:15:16,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:15:16,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:15:16,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:15:16,222 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:15:16,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:15:16,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:15:16,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:15:16,225 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:15:16,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:15:16,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:15:16,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:15:16,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:15:16,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:15:16,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:15:16,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:15:16,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:15:16,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:15:16,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:15:16,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:15:16,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:15:16,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:15:16,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:15:16,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:15:16,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:15:16,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:15:16,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:15:16,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:15:16,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:15:16,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:15:16,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:15:16,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:15:16,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:15:16,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:15:16,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:15:16,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:15:16,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:15:16,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:15:16,519 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:15:16,520 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-07-07 11:15:16,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5da61b00/3bde4c129b0246198c4dfe887dda5d26/FLAGfe573a250 [2020-07-07 11:15:17,215 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:15:17,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-07-07 11:15:17,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5da61b00/3bde4c129b0246198c4dfe887dda5d26/FLAGfe573a250 [2020-07-07 11:15:17,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5da61b00/3bde4c129b0246198c4dfe887dda5d26 [2020-07-07 11:15:17,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:15:17,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:15:17,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:15:17,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:15:17,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:15:17,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:15:17" (1/1) ... [2020-07-07 11:15:17,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@890fe98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:17, skipping insertion in model container [2020-07-07 11:15:17,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:15:17" (1/1) ... [2020-07-07 11:15:17,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:15:17,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:15:17,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:15:17,939 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:15:18,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:15:18,146 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:15:18,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18 WrapperNode [2020-07-07 11:15:18,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:15:18,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:15:18,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:15:18,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:15:18,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... [2020-07-07 11:15:18,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:15:18,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:15:18,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:15:18,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:15:18,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-07 11:15:18,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:15:18,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:15:18,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-07-07 11:15:18,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:15:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:15:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:15:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:15:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-07 11:15:18,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-07-07 11:15:18,295 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-07-07 11:15:18,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:15:18,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:15:18,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:15:18,542 WARN L775 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-07-07 11:15:19,297 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-07-07 11:15:19,298 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-07-07 11:15:19,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:15:19,312 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:15:19,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:15:19 BoogieIcfgContainer [2020-07-07 11:15:19,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:15:19,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:15:19,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:15:19,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:15:19,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:15:17" (1/3) ... [2020-07-07 11:15:19,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a6dc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:15:19, skipping insertion in model container [2020-07-07 11:15:19,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:18" (2/3) ... [2020-07-07 11:15:19,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a6dc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:15:19, skipping insertion in model container [2020-07-07 11:15:19,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:15:19" (3/3) ... [2020-07-07 11:15:19,330 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-07-07 11:15:19,343 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:15:19,355 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:15:19,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:15:19,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:15:19,401 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:15:19,401 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:15:19,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:15:19,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:15:19,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:15:19,401 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:15:19,402 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:15:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-07-07 11:15:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 11:15:19,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:19,437 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] [2020-07-07 11:15:19,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:19,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-07-07 11:15:19,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:19,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834717046] [2020-07-07 11:15:19,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:19,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834717046] [2020-07-07 11:15:19,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:19,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:19,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965474201] [2020-07-07 11:15:19,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:19,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:19,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:19,805 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-07-07 11:15:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:20,236 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-07-07 11:15:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:20,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-07 11:15:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:20,256 INFO L225 Difference]: With dead ends: 362 [2020-07-07 11:15:20,257 INFO L226 Difference]: Without dead ends: 179 [2020-07-07 11:15:20,263 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 [2020-07-07 11:15:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-07 11:15:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-07-07 11:15:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-07 11:15:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-07-07 11:15:20,338 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-07-07 11:15:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:20,339 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-07-07 11:15:20,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-07-07 11:15:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:15:20,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:20,342 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] [2020-07-07 11:15:20,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:15:20,343 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-07-07 11:15:20,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:20,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766521354] [2020-07-07 11:15:20,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:20,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766521354] [2020-07-07 11:15:20,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:20,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:20,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231908526] [2020-07-07 11:15:20,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:20,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:20,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:20,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:20,561 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-07-07 11:15:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:20,893 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-07-07 11:15:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:20,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-07 11:15:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:20,898 INFO L225 Difference]: With dead ends: 363 [2020-07-07 11:15:20,902 INFO L226 Difference]: Without dead ends: 199 [2020-07-07 11:15:20,906 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 [2020-07-07 11:15:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-07 11:15:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-07-07 11:15:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-07 11:15:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-07-07 11:15:20,948 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-07-07 11:15:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:20,949 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-07-07 11:15:20,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-07-07 11:15:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:15:20,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:20,952 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] [2020-07-07 11:15:20,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:15:20,952 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-07-07 11:15:20,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:20,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652543336] [2020-07-07 11:15:20,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:21,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652543336] [2020-07-07 11:15:21,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:21,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:21,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8356091] [2020-07-07 11:15:21,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:21,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:21,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:21,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:21,069 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-07-07 11:15:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:21,362 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-07-07 11:15:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:21,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-07 11:15:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:21,370 INFO L225 Difference]: With dead ends: 393 [2020-07-07 11:15:21,371 INFO L226 Difference]: Without dead ends: 207 [2020-07-07 11:15:21,373 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 [2020-07-07 11:15:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-07 11:15:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-07-07 11:15:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-07 11:15:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-07-07 11:15:21,404 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-07-07 11:15:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:21,404 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-07-07 11:15:21,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-07-07 11:15:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:15:21,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:21,414 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] [2020-07-07 11:15:21,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:15:21,414 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-07-07 11:15:21,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:21,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226040538] [2020-07-07 11:15:21,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:21,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226040538] [2020-07-07 11:15:21,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:21,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:21,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794438310] [2020-07-07 11:15:21,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:21,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:21,540 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-07-07 11:15:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:21,757 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-07-07 11:15:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:21,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-07 11:15:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:21,760 INFO L225 Difference]: With dead ends: 398 [2020-07-07 11:15:21,760 INFO L226 Difference]: Without dead ends: 206 [2020-07-07 11:15:21,762 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 [2020-07-07 11:15:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-07 11:15:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-07 11:15:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-07 11:15:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-07-07 11:15:21,775 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-07-07 11:15:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:21,775 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-07-07 11:15:21,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-07-07 11:15:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 11:15:21,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:21,777 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] [2020-07-07 11:15:21,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:15:21,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:21,778 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-07-07 11:15:21,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:21,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363690107] [2020-07-07 11:15:21,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:21,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363690107] [2020-07-07 11:15:21,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:21,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:21,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022085278] [2020-07-07 11:15:21,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:21,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:21,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:21,842 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-07-07 11:15:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:22,041 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-07-07 11:15:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:22,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-07-07 11:15:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:22,044 INFO L225 Difference]: With dead ends: 409 [2020-07-07 11:15:22,044 INFO L226 Difference]: Without dead ends: 216 [2020-07-07 11:15:22,045 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 [2020-07-07 11:15:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-07 11:15:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-07-07 11:15:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-07 11:15:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-07-07 11:15:22,057 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-07-07 11:15:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:22,058 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-07-07 11:15:22,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-07-07 11:15:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 11:15:22,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:22,059 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] [2020-07-07 11:15:22,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:15:22,060 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-07-07 11:15:22,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:22,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149559527] [2020-07-07 11:15:22,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:22,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149559527] [2020-07-07 11:15:22,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:22,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:22,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328534617] [2020-07-07 11:15:22,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:22,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:22,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:22,114 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-07-07 11:15:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:22,292 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-07-07 11:15:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:22,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-07 11:15:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:22,295 INFO L225 Difference]: With dead ends: 409 [2020-07-07 11:15:22,295 INFO L226 Difference]: Without dead ends: 216 [2020-07-07 11:15:22,310 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 [2020-07-07 11:15:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-07 11:15:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-07-07 11:15:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-07 11:15:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-07-07 11:15:22,326 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-07-07 11:15:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:22,332 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-07-07 11:15:22,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-07-07 11:15:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:15:22,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:22,334 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] [2020-07-07 11:15:22,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:15:22,334 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-07-07 11:15:22,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:22,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789164508] [2020-07-07 11:15:22,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:22,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789164508] [2020-07-07 11:15:22,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:22,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:22,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417366130] [2020-07-07 11:15:22,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:22,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:22,386 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-07-07 11:15:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:22,575 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-07-07 11:15:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:22,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-07 11:15:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:22,578 INFO L225 Difference]: With dead ends: 409 [2020-07-07 11:15:22,578 INFO L226 Difference]: Without dead ends: 216 [2020-07-07 11:15:22,580 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 [2020-07-07 11:15:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-07 11:15:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-07-07 11:15:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-07 11:15:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-07-07 11:15:22,594 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-07-07 11:15:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:22,594 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-07-07 11:15:22,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-07-07 11:15:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:15:22,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:22,597 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] [2020-07-07 11:15:22,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:15:22,598 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:22,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-07-07 11:15:22,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:22,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089917350] [2020-07-07 11:15:22,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:22,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089917350] [2020-07-07 11:15:22,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:22,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:15:22,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468396645] [2020-07-07 11:15:22,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:15:22,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:15:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:15:22,717 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-07-07 11:15:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:23,064 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-07-07 11:15:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:15:23,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-07-07 11:15:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:23,067 INFO L225 Difference]: With dead ends: 605 [2020-07-07 11:15:23,068 INFO L226 Difference]: Without dead ends: 412 [2020-07-07 11:15:23,069 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 [2020-07-07 11:15:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-07-07 11:15:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-07-07 11:15:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-07-07 11:15:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-07-07 11:15:23,093 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-07-07 11:15:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:23,093 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-07-07 11:15:23,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:15:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-07-07 11:15:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:15:23,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:23,095 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] [2020-07-07 11:15:23,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:15:23,096 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-07-07 11:15:23,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:23,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731782668] [2020-07-07 11:15:23,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:23,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731782668] [2020-07-07 11:15:23,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:23,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:23,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717062748] [2020-07-07 11:15:23,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:23,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:23,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:23,188 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-07-07 11:15:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:23,465 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-07-07 11:15:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:23,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-07-07 11:15:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:23,472 INFO L225 Difference]: With dead ends: 847 [2020-07-07 11:15:23,472 INFO L226 Difference]: Without dead ends: 472 [2020-07-07 11:15:23,474 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 [2020-07-07 11:15:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-07 11:15:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-07-07 11:15:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-07-07 11:15:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-07-07 11:15:23,511 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-07-07 11:15:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:23,511 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-07-07 11:15:23,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-07-07 11:15:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 11:15:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:23,514 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] [2020-07-07 11:15:23,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:15:23,519 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-07-07 11:15:23,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:23,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606284682] [2020-07-07 11:15:23,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:23,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606284682] [2020-07-07 11:15:23,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:23,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:23,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668288640] [2020-07-07 11:15:23,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:23,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:23,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:23,588 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-07-07 11:15:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:23,886 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-07-07 11:15:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:23,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-07-07 11:15:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:23,891 INFO L225 Difference]: With dead ends: 936 [2020-07-07 11:15:23,891 INFO L226 Difference]: Without dead ends: 495 [2020-07-07 11:15:23,893 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 [2020-07-07 11:15:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-07-07 11:15:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-07-07 11:15:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-07-07 11:15:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-07-07 11:15:23,919 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-07-07 11:15:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:23,920 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-07-07 11:15:23,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-07-07 11:15:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:15:23,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:23,922 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] [2020-07-07 11:15:23,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:15:23,922 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-07-07 11:15:23,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:23,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168651468] [2020-07-07 11:15:23,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:15:24,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168651468] [2020-07-07 11:15:24,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:24,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:24,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567746382] [2020-07-07 11:15:24,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:24,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:24,007 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-07-07 11:15:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:24,283 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-07-07 11:15:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:24,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-07-07 11:15:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:24,288 INFO L225 Difference]: With dead ends: 993 [2020-07-07 11:15:24,289 INFO L226 Difference]: Without dead ends: 529 [2020-07-07 11:15:24,290 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 [2020-07-07 11:15:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-07 11:15:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-07-07 11:15:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-07-07 11:15:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-07-07 11:15:24,323 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-07-07 11:15:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:24,324 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-07-07 11:15:24,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-07-07 11:15:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 11:15:24,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:24,326 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] [2020-07-07 11:15:24,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:15:24,327 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-07-07 11:15:24,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:24,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145988273] [2020-07-07 11:15:24,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:15:24,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145988273] [2020-07-07 11:15:24,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:24,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:24,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976424757] [2020-07-07 11:15:24,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:24,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:24,395 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-07-07 11:15:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:24,631 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-07-07 11:15:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:24,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-07 11:15:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:24,636 INFO L225 Difference]: With dead ends: 1027 [2020-07-07 11:15:24,636 INFO L226 Difference]: Without dead ends: 529 [2020-07-07 11:15:24,638 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 [2020-07-07 11:15:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-07 11:15:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-07-07 11:15:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-07-07 11:15:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-07-07 11:15:24,669 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-07-07 11:15:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:24,669 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-07-07 11:15:24,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-07-07 11:15:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 11:15:24,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:24,671 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] [2020-07-07 11:15:24,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:15:24,672 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:24,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-07-07 11:15:24,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:24,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190475494] [2020-07-07 11:15:24,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:15:24,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190475494] [2020-07-07 11:15:24,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:24,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:24,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081811667] [2020-07-07 11:15:24,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:24,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:24,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:24,734 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-07-07 11:15:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:25,045 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-07-07 11:15:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:25,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-07 11:15:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:25,050 INFO L225 Difference]: With dead ends: 1074 [2020-07-07 11:15:25,051 INFO L226 Difference]: Without dead ends: 576 [2020-07-07 11:15:25,052 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 [2020-07-07 11:15:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-07-07 11:15:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-07-07 11:15:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-07-07 11:15:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-07-07 11:15:25,086 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-07-07 11:15:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:25,087 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-07-07 11:15:25,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-07-07 11:15:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-07 11:15:25,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:25,128 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] [2020-07-07 11:15:25,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:15:25,129 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-07-07 11:15:25,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:25,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732315235] [2020-07-07 11:15:25,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:25,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732315235] [2020-07-07 11:15:25,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:25,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:25,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061115913] [2020-07-07 11:15:25,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:25,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:25,214 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-07-07 11:15:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:25,470 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-07-07 11:15:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:25,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-07-07 11:15:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:25,475 INFO L225 Difference]: With dead ends: 1184 [2020-07-07 11:15:25,475 INFO L226 Difference]: Without dead ends: 623 [2020-07-07 11:15:25,477 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 [2020-07-07 11:15:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-07-07 11:15:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-07-07 11:15:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-07-07 11:15:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-07-07 11:15:25,514 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-07-07 11:15:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:25,514 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-07-07 11:15:25,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-07-07 11:15:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 11:15:25,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:25,519 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] [2020-07-07 11:15:25,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:15:25,519 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-07-07 11:15:25,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:25,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372238465] [2020-07-07 11:15:25,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:25,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372238465] [2020-07-07 11:15:25,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:25,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:25,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229380964] [2020-07-07 11:15:25,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:25,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:25,628 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-07-07 11:15:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:25,969 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-07-07 11:15:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:25,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-07-07 11:15:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:25,974 INFO L225 Difference]: With dead ends: 1227 [2020-07-07 11:15:25,975 INFO L226 Difference]: Without dead ends: 623 [2020-07-07 11:15:25,979 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 [2020-07-07 11:15:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-07-07 11:15:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-07-07 11:15:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-07-07 11:15:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-07-07 11:15:26,019 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-07-07 11:15:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:26,019 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-07-07 11:15:26,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-07-07 11:15:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-07 11:15:26,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:26,022 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] [2020-07-07 11:15:26,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:15:26,023 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-07-07 11:15:26,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:26,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407904357] [2020-07-07 11:15:26,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:15:26,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407904357] [2020-07-07 11:15:26,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:26,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:26,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471278436] [2020-07-07 11:15:26,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:26,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:26,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:26,127 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-07-07 11:15:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:26,424 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-07-07 11:15:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:26,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-07-07 11:15:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:26,428 INFO L225 Difference]: With dead ends: 1223 [2020-07-07 11:15:26,428 INFO L226 Difference]: Without dead ends: 619 [2020-07-07 11:15:26,430 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 [2020-07-07 11:15:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-07-07 11:15:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-07-07 11:15:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-07-07 11:15:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-07-07 11:15:26,465 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-07-07 11:15:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:26,466 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-07-07 11:15:26,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-07-07 11:15:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-07 11:15:26,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:26,468 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] [2020-07-07 11:15:26,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:15:26,468 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-07-07 11:15:26,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:26,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354975973] [2020-07-07 11:15:26,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 11:15:26,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354975973] [2020-07-07 11:15:26,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:26,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:26,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002828980] [2020-07-07 11:15:26,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:26,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:26,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:26,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:26,540 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-07-07 11:15:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:26,821 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-07-07 11:15:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:26,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-07-07 11:15:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:26,826 INFO L225 Difference]: With dead ends: 1281 [2020-07-07 11:15:26,826 INFO L226 Difference]: Without dead ends: 677 [2020-07-07 11:15:26,829 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 [2020-07-07 11:15:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-07-07 11:15:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-07-07 11:15:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-07-07 11:15:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-07-07 11:15:26,886 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-07-07 11:15:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:26,886 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-07-07 11:15:26,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-07-07 11:15:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-07 11:15:26,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:26,890 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] [2020-07-07 11:15:26,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:15:26,891 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-07-07 11:15:26,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:26,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990172665] [2020-07-07 11:15:26,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 11:15:26,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990172665] [2020-07-07 11:15:26,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:26,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:26,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906235949] [2020-07-07 11:15:27,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:27,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:27,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:27,001 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-07-07 11:15:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:27,271 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-07-07 11:15:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:27,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-07-07 11:15:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:27,276 INFO L225 Difference]: With dead ends: 1313 [2020-07-07 11:15:27,277 INFO L226 Difference]: Without dead ends: 677 [2020-07-07 11:15:27,279 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 [2020-07-07 11:15:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-07-07 11:15:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-07-07 11:15:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-07-07 11:15:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-07-07 11:15:27,360 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-07-07 11:15:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:27,360 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-07-07 11:15:27,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-07-07 11:15:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-07 11:15:27,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:27,364 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] [2020-07-07 11:15:27,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 11:15:27,364 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-07-07 11:15:27,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:27,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996645295] [2020-07-07 11:15:27,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:15:27,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996645295] [2020-07-07 11:15:27,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:27,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:27,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446053433] [2020-07-07 11:15:27,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:27,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:27,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:27,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:27,432 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-07-07 11:15:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:27,700 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-07-07 11:15:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:27,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-07-07 11:15:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:27,705 INFO L225 Difference]: With dead ends: 1349 [2020-07-07 11:15:27,706 INFO L226 Difference]: Without dead ends: 713 [2020-07-07 11:15:27,708 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 [2020-07-07 11:15:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-07-07 11:15:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-07-07 11:15:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-07-07 11:15:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-07-07 11:15:27,755 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-07-07 11:15:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:27,755 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-07-07 11:15:27,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-07-07 11:15:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-07 11:15:27,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:27,758 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] [2020-07-07 11:15:27,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 11:15:27,759 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-07-07 11:15:27,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:27,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082757226] [2020-07-07 11:15:27,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:15:27,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082757226] [2020-07-07 11:15:27,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:27,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:27,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061664200] [2020-07-07 11:15:27,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:27,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:27,831 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-07-07 11:15:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:28,120 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-07-07 11:15:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:28,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-07-07 11:15:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:28,125 INFO L225 Difference]: With dead ends: 1406 [2020-07-07 11:15:28,125 INFO L226 Difference]: Without dead ends: 714 [2020-07-07 11:15:28,128 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 [2020-07-07 11:15:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-07-07 11:15:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-07-07 11:15:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-07-07 11:15:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-07-07 11:15:28,175 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-07-07 11:15:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:28,176 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-07-07 11:15:28,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-07-07 11:15:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-07 11:15:28,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:28,179 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] [2020-07-07 11:15:28,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 11:15:28,179 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:28,180 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-07-07 11:15:28,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:28,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460138070] [2020-07-07 11:15:28,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-07 11:15:28,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460138070] [2020-07-07 11:15:28,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:28,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:28,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972410073] [2020-07-07 11:15:28,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:28,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:28,261 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-07-07 11:15:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:28,611 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-07-07 11:15:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:28,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-07-07 11:15:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:28,619 INFO L225 Difference]: With dead ends: 1438 [2020-07-07 11:15:28,619 INFO L226 Difference]: Without dead ends: 749 [2020-07-07 11:15:28,622 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 [2020-07-07 11:15:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-07-07 11:15:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-07-07 11:15:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-07-07 11:15:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-07-07 11:15:28,679 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-07-07 11:15:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:28,679 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-07-07 11:15:28,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-07-07 11:15:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-07 11:15:28,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:28,683 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] [2020-07-07 11:15:28,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:15:28,684 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:28,685 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-07-07 11:15:28,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:28,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047652660] [2020-07-07 11:15:28,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-07 11:15:28,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047652660] [2020-07-07 11:15:28,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:28,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:28,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531456233] [2020-07-07 11:15:28,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:28,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:28,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:28,791 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-07-07 11:15:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:29,134 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-07-07 11:15:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:29,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-07-07 11:15:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:29,140 INFO L225 Difference]: With dead ends: 1479 [2020-07-07 11:15:29,140 INFO L226 Difference]: Without dead ends: 749 [2020-07-07 11:15:29,142 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 [2020-07-07 11:15:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-07-07 11:15:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-07-07 11:15:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-07-07 11:15:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-07-07 11:15:29,203 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-07-07 11:15:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:29,203 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-07-07 11:15:29,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-07-07 11:15:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-07 11:15:29,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:29,205 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] [2020-07-07 11:15:29,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 11:15:29,206 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-07-07 11:15:29,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:29,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541951093] [2020-07-07 11:15:29,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-07 11:15:29,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541951093] [2020-07-07 11:15:29,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:29,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:29,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831872631] [2020-07-07 11:15:29,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:29,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:29,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:29,300 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-07-07 11:15:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:29,647 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-07-07 11:15:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:29,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-07-07 11:15:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:29,654 INFO L225 Difference]: With dead ends: 1515 [2020-07-07 11:15:29,654 INFO L226 Difference]: Without dead ends: 785 [2020-07-07 11:15:29,660 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 [2020-07-07 11:15:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-07-07 11:15:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-07-07 11:15:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-07-07 11:15:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-07-07 11:15:29,724 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-07-07 11:15:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:29,725 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-07-07 11:15:29,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-07-07 11:15:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:15:29,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:29,727 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] [2020-07-07 11:15:29,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 11:15:29,729 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-07-07 11:15:29,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:29,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931939069] [2020-07-07 11:15:29,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-07 11:15:29,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931939069] [2020-07-07 11:15:29,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:29,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:29,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926099328] [2020-07-07 11:15:29,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:29,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:29,870 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-07-07 11:15:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:30,140 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-07-07 11:15:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:30,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-07-07 11:15:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:30,146 INFO L225 Difference]: With dead ends: 1547 [2020-07-07 11:15:30,146 INFO L226 Difference]: Without dead ends: 785 [2020-07-07 11:15:30,149 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 [2020-07-07 11:15:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-07-07 11:15:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-07-07 11:15:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-07-07 11:15:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-07-07 11:15:30,209 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-07-07 11:15:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:30,210 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-07-07 11:15:30,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-07-07 11:15:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-07 11:15:30,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:30,213 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] [2020-07-07 11:15:30,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 11:15:30,213 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:30,214 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-07-07 11:15:30,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:30,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413217968] [2020-07-07 11:15:30,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-07-07 11:15:30,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413217968] [2020-07-07 11:15:30,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:30,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:30,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452378609] [2020-07-07 11:15:30,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:30,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:30,305 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-07-07 11:15:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:30,580 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-07-07 11:15:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:30,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-07-07 11:15:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:30,585 INFO L225 Difference]: With dead ends: 1573 [2020-07-07 11:15:30,585 INFO L226 Difference]: Without dead ends: 811 [2020-07-07 11:15:30,588 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 [2020-07-07 11:15:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-07-07 11:15:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-07-07 11:15:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-07-07 11:15:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-07-07 11:15:30,653 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-07-07 11:15:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:30,653 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-07-07 11:15:30,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-07-07 11:15:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-07 11:15:30,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:30,660 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] [2020-07-07 11:15:30,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 11:15:30,660 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-07-07 11:15:30,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:30,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184127938] [2020-07-07 11:15:30,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-07-07 11:15:30,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184127938] [2020-07-07 11:15:30,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:30,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:30,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313079982] [2020-07-07 11:15:30,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:30,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:30,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:30,746 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-07-07 11:15:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:31,057 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-07-07 11:15:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:31,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-07-07 11:15:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:31,062 INFO L225 Difference]: With dead ends: 1601 [2020-07-07 11:15:31,062 INFO L226 Difference]: Without dead ends: 811 [2020-07-07 11:15:31,065 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 [2020-07-07 11:15:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-07-07 11:15:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-07-07 11:15:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-07-07 11:15:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-07-07 11:15:31,181 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-07-07 11:15:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:31,182 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-07-07 11:15:31,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-07-07 11:15:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-07 11:15:31,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:31,185 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] [2020-07-07 11:15:31,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 11:15:31,186 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-07-07 11:15:31,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:31,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107651269] [2020-07-07 11:15:31,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-07 11:15:31,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107651269] [2020-07-07 11:15:31,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:31,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:31,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86575227] [2020-07-07 11:15:31,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:31,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:31,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:31,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:31,269 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-07-07 11:15:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:31,543 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-07-07 11:15:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:31,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-07-07 11:15:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:31,548 INFO L225 Difference]: With dead ends: 1656 [2020-07-07 11:15:31,548 INFO L226 Difference]: Without dead ends: 866 [2020-07-07 11:15:31,551 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 [2020-07-07 11:15:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-07-07 11:15:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-07-07 11:15:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-07-07 11:15:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-07-07 11:15:31,601 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-07-07 11:15:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:31,601 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-07-07 11:15:31,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-07-07 11:15:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-07 11:15:31,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:31,604 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] [2020-07-07 11:15:31,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 11:15:31,605 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-07-07 11:15:31,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:31,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435980795] [2020-07-07 11:15:31,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-07 11:15:31,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435980795] [2020-07-07 11:15:31,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:31,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:31,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698212399] [2020-07-07 11:15:31,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:31,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:31,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:31,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:31,694 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-07-07 11:15:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:32,008 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-07-07 11:15:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:32,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-07-07 11:15:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:32,015 INFO L225 Difference]: With dead ends: 1705 [2020-07-07 11:15:32,015 INFO L226 Difference]: Without dead ends: 850 [2020-07-07 11:15:32,018 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 [2020-07-07 11:15:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-07-07 11:15:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-07-07 11:15:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-07-07 11:15:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-07-07 11:15:32,081 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-07-07 11:15:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:32,081 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-07-07 11:15:32,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-07-07 11:15:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-07 11:15:32,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:32,084 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] [2020-07-07 11:15:32,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 11:15:32,085 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-07-07 11:15:32,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:32,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670880513] [2020-07-07 11:15:32,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-07 11:15:32,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670880513] [2020-07-07 11:15:32,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:32,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:32,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978061815] [2020-07-07 11:15:32,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:32,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:32,166 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-07-07 11:15:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:32,475 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-07-07 11:15:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:32,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-07-07 11:15:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:32,480 INFO L225 Difference]: With dead ends: 1671 [2020-07-07 11:15:32,480 INFO L226 Difference]: Without dead ends: 848 [2020-07-07 11:15:32,484 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 [2020-07-07 11:15:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-07-07 11:15:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-07-07 11:15:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-07-07 11:15:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-07-07 11:15:32,532 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-07-07 11:15:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:32,533 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-07-07 11:15:32,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-07-07 11:15:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-07 11:15:32,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:32,535 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] [2020-07-07 11:15:32,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 11:15:32,536 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-07-07 11:15:32,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:32,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861721881] [2020-07-07 11:15:32,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-07 11:15:32,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861721881] [2020-07-07 11:15:32,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:32,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:15:32,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300345468] [2020-07-07 11:15:32,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:15:32,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:32,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:15:32,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:15:32,606 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-07-07 11:15:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:32,874 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-07-07 11:15:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:15:32,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-07-07 11:15:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:32,880 INFO L225 Difference]: With dead ends: 1671 [2020-07-07 11:15:32,880 INFO L226 Difference]: Without dead ends: 831 [2020-07-07 11:15:32,883 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 [2020-07-07 11:15:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-07-07 11:15:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-07-07 11:15:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-07-07 11:15:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-07-07 11:15:32,933 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-07-07 11:15:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:32,933 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-07-07 11:15:32,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:15:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-07-07 11:15:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-07 11:15:32,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:32,936 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] [2020-07-07 11:15:32,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 11:15:32,936 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-07-07 11:15:32,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:32,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101297910] [2020-07-07 11:15:32,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-07 11:15:33,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101297910] [2020-07-07 11:15:33,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:33,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:33,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675835910] [2020-07-07 11:15:33,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:33,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:33,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:33,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:33,018 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-07-07 11:15:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:33,107 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-07-07 11:15:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:33,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-07-07 11:15:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:33,116 INFO L225 Difference]: With dead ends: 2417 [2020-07-07 11:15:33,116 INFO L226 Difference]: Without dead ends: 1611 [2020-07-07 11:15:33,119 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 [2020-07-07 11:15:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-07-07 11:15:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-07-07 11:15:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-07-07 11:15:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-07-07 11:15:33,185 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-07-07 11:15:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:33,186 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-07-07 11:15:33,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-07-07 11:15:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-07 11:15:33,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:33,188 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] [2020-07-07 11:15:33,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 11:15:33,189 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:33,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-07-07 11:15:33,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:33,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751329512] [2020-07-07 11:15:33,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-07-07 11:15:33,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751329512] [2020-07-07 11:15:33,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:33,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:33,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107232229] [2020-07-07 11:15:33,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:33,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:33,338 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-07-07 11:15:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:33,438 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-07-07 11:15:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:33,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-07-07 11:15:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:33,449 INFO L225 Difference]: With dead ends: 2416 [2020-07-07 11:15:33,450 INFO L226 Difference]: Without dead ends: 1608 [2020-07-07 11:15:33,454 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 [2020-07-07 11:15:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-07-07 11:15:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-07-07 11:15:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-07-07 11:15:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-07-07 11:15:33,552 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-07-07 11:15:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:33,552 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-07-07 11:15:33,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-07-07 11:15:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-07 11:15:33,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:33,556 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] [2020-07-07 11:15:33,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 11:15:33,556 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-07-07 11:15:33,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:33,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636400170] [2020-07-07 11:15:33,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:33,620 ERROR L253 erpolLogProxyWrapper]: Interpolant 92 not inductive [2020-07-07 11:15:33,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-07 11:15:33,624 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:884) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:385) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:337) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 11:15:33,631 INFO L168 Benchmark]: Toolchain (without parser) took 16084.71 ms. Allocated memory was 138.4 MB in the beginning and 496.0 MB in the end (delta: 357.6 MB). Free memory was 101.7 MB in the beginning and 335.3 MB in the end (delta: -233.6 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:33,631 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:15:33,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 600.51 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.3 MB in the beginning and 178.3 MB in the end (delta: -77.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:33,632 INFO L168 Benchmark]: Boogie Preprocessor took 75.09 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 175.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:33,633 INFO L168 Benchmark]: RCFGBuilder took 1096.34 ms. Allocated memory is still 203.4 MB. Free memory was 175.7 MB in the beginning and 117.3 MB in the end (delta: 58.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:33,633 INFO L168 Benchmark]: TraceAbstraction took 14307.29 ms. Allocated memory was 203.4 MB in the beginning and 496.0 MB in the end (delta: 292.6 MB). Free memory was 117.3 MB in the beginning and 335.3 MB in the end (delta: -218.1 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:33,636 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 600.51 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.3 MB in the beginning and 178.3 MB in the end (delta: -77.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.09 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 175.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1096.34 ms. Allocated memory is still 203.4 MB. Free memory was 175.7 MB in the beginning and 117.3 MB in the end (delta: 58.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14307.29 ms. Allocated memory was 203.4 MB in the beginning and 496.0 MB in the end (delta: 292.6 MB). Free memory was 117.3 MB in the beginning and 335.3 MB in the end (delta: -218.1 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...