/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:57:18,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:57:18,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:57:18,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:57:18,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:57:18,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:57:18,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:57:18,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:57:18,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:57:18,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:57:18,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:57:18,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:57:18,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:57:18,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:57:18,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:57:18,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:57:18,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:57:18,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:57:18,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:57:18,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:57:18,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:57:18,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:57:18,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:57:18,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:57:18,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:57:18,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:57:18,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:57:18,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:57:18,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:57:18,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 18:57:18,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:57:18,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:57:18,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:57:18,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:57:18,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:57:18,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:57:18,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:57:18,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:57:18,286 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:57:18,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:57:18,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:57:18,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:57:18,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:57:18,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:57:18,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:57:18,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:57:18,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:57:18,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:57:18,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:57:18,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:57:18,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:57:18,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:57:18,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:57:18,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:57:18,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:57:18,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:18,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:57:18,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:57:18,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:57:18,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:57:18,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:57:18,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:57:18,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:57:18,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:57:18,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:57:18,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:57:18,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:57:18,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:57:18,596 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:57:18,597 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 18:57:18,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d41ec750/b0ec78fa63914a58aad721f1d7e32180/FLAGe910bd752 [2020-08-21 18:57:19,192 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:57:19,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-21 18:57:19,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d41ec750/b0ec78fa63914a58aad721f1d7e32180/FLAGe910bd752 [2020-08-21 18:57:19,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d41ec750/b0ec78fa63914a58aad721f1d7e32180 [2020-08-21 18:57:19,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:57:19,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:57:19,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:19,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:57:19,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:57:19,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:19" (1/1) ... [2020-08-21 18:57:19,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0a7f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:19, skipping insertion in model container [2020-08-21 18:57:19,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:19" (1/1) ... [2020-08-21 18:57:19,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:57:19,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:57:19,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:19,834 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:57:20,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:20,024 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:57:20,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20 WrapperNode [2020-08-21 18:57:20,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:20,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:57:20,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:57:20,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:57:20,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... [2020-08-21 18:57:20,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:57:20,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:57:20,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:57:20,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:57:20,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:57:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:57:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-21 18:57:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:57:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:57:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 18:57:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:57:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 18:57:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-21 18:57:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:57:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:57:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:57:20,369 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 18:57:21,020 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-21 18:57:21,021 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-21 18:57:21,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:57:21,033 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:57:21,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:21 BoogieIcfgContainer [2020-08-21 18:57:21,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:57:21,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:57:21,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:57:21,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:57:21,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:57:19" (1/3) ... [2020-08-21 18:57:21,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9f83a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:21, skipping insertion in model container [2020-08-21 18:57:21,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:20" (2/3) ... [2020-08-21 18:57:21,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9f83a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:21, skipping insertion in model container [2020-08-21 18:57:21,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:21" (3/3) ... [2020-08-21 18:57:21,050 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-21 18:57:21,062 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:57:21,070 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:57:21,086 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:57:21,113 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:57:21,113 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:57:21,114 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:57:21,114 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:57:21,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:57:21,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:57:21,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:57:21,115 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:57:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-21 18:57:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:57:21,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:21,146 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] [2020-08-21 18:57:21,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-21 18:57:21,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:21,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204539994] [2020-08-21 18:57:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:21,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:21,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204539994] [2020-08-21 18:57:21,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:21,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:57:21,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848661657] [2020-08-21 18:57:21,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:57:21,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:57:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:57:21,476 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-21 18:57:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:22,055 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-21 18:57:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:57:22,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 18:57:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:22,073 INFO L225 Difference]: With dead ends: 375 [2020-08-21 18:57:22,073 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 18:57:22,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:57:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 18:57:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-21 18:57:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 18:57:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-21 18:57:22,146 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-21 18:57:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:22,147 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-21 18:57:22,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:57:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-21 18:57:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:57:22,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:22,149 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] [2020-08-21 18:57:22,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:57:22,150 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-21 18:57:22,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:22,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812750040] [2020-08-21 18:57:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:22,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:22,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812750040] [2020-08-21 18:57:22,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:22,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:57:22,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321091834] [2020-08-21 18:57:22,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:57:22,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:57:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:57:22,312 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-21 18:57:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:22,655 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-21 18:57:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:57:22,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-21 18:57:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:22,659 INFO L225 Difference]: With dead ends: 448 [2020-08-21 18:57:22,659 INFO L226 Difference]: Without dead ends: 260 [2020-08-21 18:57:22,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:57:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-21 18:57:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-21 18:57:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-21 18:57:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-21 18:57:22,688 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-21 18:57:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:22,688 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-21 18:57:22,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:57:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-21 18:57:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 18:57:22,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:22,690 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] [2020-08-21 18:57:22,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:57:22,691 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:22,691 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-21 18:57:22,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:22,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177316533] [2020-08-21 18:57:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:22,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177316533] [2020-08-21 18:57:22,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:22,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:22,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127994332] [2020-08-21 18:57:22,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:22,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:22,824 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-21 18:57:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:22,871 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-21 18:57:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:22,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-21 18:57:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:22,877 INFO L225 Difference]: With dead ends: 698 [2020-08-21 18:57:22,877 INFO L226 Difference]: Without dead ends: 466 [2020-08-21 18:57:22,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-21 18:57:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-21 18:57:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-21 18:57:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-21 18:57:22,937 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-21 18:57:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:22,938 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-21 18:57:22,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-21 18:57:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 18:57:22,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:22,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:22,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:57:22,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-21 18:57:22,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:22,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74678869] [2020-08-21 18:57:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:23,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74678869] [2020-08-21 18:57:23,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:57:23,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285911223] [2020-08-21 18:57:23,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:57:23,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:57:23,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:57:23,093 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-21 18:57:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:23,440 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-21 18:57:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:57:23,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 18:57:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:23,446 INFO L225 Difference]: With dead ends: 1155 [2020-08-21 18:57:23,447 INFO L226 Difference]: Without dead ends: 655 [2020-08-21 18:57:23,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:57:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-21 18:57:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-21 18:57:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 18:57:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-21 18:57:23,479 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-21 18:57:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:23,479 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-21 18:57:23,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:57:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-21 18:57:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 18:57:23,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,484 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:23,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:57:23,485 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-21 18:57:23,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686433014] [2020-08-21 18:57:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:23,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686433014] [2020-08-21 18:57:23,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:23,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978786339] [2020-08-21 18:57:23,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:23,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:23,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,549 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-21 18:57:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:23,569 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-21 18:57:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:23,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-21 18:57:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:23,574 INFO L225 Difference]: With dead ends: 1038 [2020-08-21 18:57:23,574 INFO L226 Difference]: Without dead ends: 526 [2020-08-21 18:57:23,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-21 18:57:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-21 18:57:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-21 18:57:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-21 18:57:23,602 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-21 18:57:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:23,604 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-21 18:57:23,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-21 18:57:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 18:57:23,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,608 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] [2020-08-21 18:57:23,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:57:23,609 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-21 18:57:23,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123133996] [2020-08-21 18:57:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:23,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123133996] [2020-08-21 18:57:23,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:23,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822088841] [2020-08-21 18:57:23,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:23,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:23,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,677 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-21 18:57:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:23,713 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-21 18:57:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:23,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 18:57:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:23,718 INFO L225 Difference]: With dead ends: 1048 [2020-08-21 18:57:23,718 INFO L226 Difference]: Without dead ends: 536 [2020-08-21 18:57:23,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-21 18:57:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-21 18:57:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-21 18:57:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-21 18:57:23,745 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-21 18:57:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:23,745 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-21 18:57:23,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-21 18:57:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 18:57:23,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,748 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:23,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:57:23,748 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-21 18:57:23,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255155985] [2020-08-21 18:57:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:23,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255155985] [2020-08-21 18:57:23,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:23,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403340329] [2020-08-21 18:57:23,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:23,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:23,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,836 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-21 18:57:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,064 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-21 18:57:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-21 18:57:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,069 INFO L225 Difference]: With dead ends: 1234 [2020-08-21 18:57:24,070 INFO L226 Difference]: Without dead ends: 670 [2020-08-21 18:57:24,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-21 18:57:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-21 18:57:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-21 18:57:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-21 18:57:24,095 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-21 18:57:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,096 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-21 18:57:24,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-21 18:57:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:57:24,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,097 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] [2020-08-21 18:57:24,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:57:24,098 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-21 18:57:24,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400105923] [2020-08-21 18:57:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:24,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400105923] [2020-08-21 18:57:24,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987931839] [2020-08-21 18:57:24,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,144 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-21 18:57:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,186 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-21 18:57:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 18:57:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,194 INFO L225 Difference]: With dead ends: 1720 [2020-08-21 18:57:24,194 INFO L226 Difference]: Without dead ends: 1149 [2020-08-21 18:57:24,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-21 18:57:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-21 18:57:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-21 18:57:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-21 18:57:24,235 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-21 18:57:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,235 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-21 18:57:24,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-21 18:57:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:57:24,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,237 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] [2020-08-21 18:57:24,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:57:24,238 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-21 18:57:24,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443111709] [2020-08-21 18:57:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:24,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443111709] [2020-08-21 18:57:24,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328194874] [2020-08-21 18:57:24,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,287 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-21 18:57:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,366 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-21 18:57:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-21 18:57:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,376 INFO L225 Difference]: With dead ends: 2602 [2020-08-21 18:57:24,376 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 18:57:24,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 18:57:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-21 18:57:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-21 18:57:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-21 18:57:24,447 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-21 18:57:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,448 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-21 18:57:24,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-21 18:57:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 18:57:24,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,450 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] [2020-08-21 18:57:24,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:57:24,450 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-21 18:57:24,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871347525] [2020-08-21 18:57:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:24,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871347525] [2020-08-21 18:57:24,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012205567] [2020-08-21 18:57:24,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,506 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-21 18:57:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,705 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-21 18:57:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 18:57:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,717 INFO L225 Difference]: With dead ends: 3635 [2020-08-21 18:57:24,717 INFO L226 Difference]: Without dead ends: 1924 [2020-08-21 18:57:24,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-21 18:57:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-21 18:57:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 18:57:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-21 18:57:24,791 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-21 18:57:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,792 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-21 18:57:24,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-21 18:57:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 18:57:24,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,794 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:24,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:57:24,794 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,795 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-21 18:57:24,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296479340] [2020-08-21 18:57:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:24,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296479340] [2020-08-21 18:57:24,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281343760] [2020-08-21 18:57:24,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,844 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-21 18:57:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,139 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-21 18:57:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 18:57:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,151 INFO L225 Difference]: With dead ends: 3747 [2020-08-21 18:57:25,151 INFO L226 Difference]: Without dead ends: 1933 [2020-08-21 18:57:25,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-21 18:57:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-21 18:57:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 18:57:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-21 18:57:25,242 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-21 18:57:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,243 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-21 18:57:25,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-21 18:57:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 18:57:25,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:25,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:57:25,245 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-21 18:57:25,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601635425] [2020-08-21 18:57:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:25,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601635425] [2020-08-21 18:57:25,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779489784] [2020-08-21 18:57:25,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,295 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-21 18:57:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,494 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-21 18:57:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-21 18:57:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,504 INFO L225 Difference]: With dead ends: 3744 [2020-08-21 18:57:25,504 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 18:57:25,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 18:57:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-21 18:57:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-21 18:57:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-21 18:57:25,578 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-21 18:57:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,578 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-21 18:57:25,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-21 18:57:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 18:57:25,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,580 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:25,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:57:25,581 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-21 18:57:25,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627296003] [2020-08-21 18:57:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:25,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627296003] [2020-08-21 18:57:25,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401954882] [2020-08-21 18:57:25,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,630 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-21 18:57:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,888 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-21 18:57:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-21 18:57:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,902 INFO L225 Difference]: With dead ends: 3741 [2020-08-21 18:57:25,902 INFO L226 Difference]: Without dead ends: 1891 [2020-08-21 18:57:25,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-21 18:57:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-21 18:57:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 18:57:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-21 18:57:26,009 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-21 18:57:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,010 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-21 18:57:26,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-21 18:57:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:57:26,012 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,013 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:26,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:57:26,013 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-21 18:57:26,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28063275] [2020-08-21 18:57:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28063275] [2020-08-21 18:57:26,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368288250] [2020-08-21 18:57:26,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,071 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-21 18:57:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,335 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-21 18:57:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-21 18:57:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,349 INFO L225 Difference]: With dead ends: 3810 [2020-08-21 18:57:26,349 INFO L226 Difference]: Without dead ends: 1960 [2020-08-21 18:57:26,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-21 18:57:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-21 18:57:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-21 18:57:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-21 18:57:26,469 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-21 18:57:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,469 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-21 18:57:26,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-21 18:57:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 18:57:26,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,472 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:26,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:57:26,473 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-21 18:57:26,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100701727] [2020-08-21 18:57:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100701727] [2020-08-21 18:57:26,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560231239] [2020-08-21 18:57:26,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,551 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-21 18:57:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,909 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-21 18:57:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-21 18:57:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,924 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 18:57:26,924 INFO L226 Difference]: Without dead ends: 2096 [2020-08-21 18:57:26,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-21 18:57:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-21 18:57:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-21 18:57:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-21 18:57:27,049 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-21 18:57:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,049 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-21 18:57:27,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-21 18:57:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 18:57:27,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,051 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:27,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:57:27,051 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-21 18:57:27,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045030320] [2020-08-21 18:57:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 18:57:27,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045030320] [2020-08-21 18:57:27,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469299912] [2020-08-21 18:57:27,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,105 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-21 18:57:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,423 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-21 18:57:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 18:57:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,439 INFO L225 Difference]: With dead ends: 4276 [2020-08-21 18:57:27,440 INFO L226 Difference]: Without dead ends: 2293 [2020-08-21 18:57:27,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-21 18:57:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-21 18:57:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-21 18:57:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-21 18:57:27,537 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-21 18:57:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,537 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-21 18:57:27,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-21 18:57:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 18:57:27,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,539 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 18:57:27,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:57:27,539 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-21 18:57:27,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981624073] [2020-08-21 18:57:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 18:57:27,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981624073] [2020-08-21 18:57:27,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861324063] [2020-08-21 18:57:27,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,577 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-21 18:57:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,684 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-21 18:57:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-21 18:57:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,699 INFO L225 Difference]: With dead ends: 4420 [2020-08-21 18:57:27,700 INFO L226 Difference]: Without dead ends: 2947 [2020-08-21 18:57:27,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-21 18:57:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-21 18:57:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-21 18:57:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-21 18:57:27,796 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-21 18:57:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,797 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-21 18:57:27,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-21 18:57:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 18:57:27,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:57:27,799 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-21 18:57:27,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032132905] [2020-08-21 18:57:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:57:27,819 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:57:27,819 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:57:27,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:57:27,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:57:27 BoogieIcfgContainer [2020-08-21 18:57:27,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:57:27,851 INFO L168 Benchmark]: Toolchain (without parser) took 8334.39 ms. Allocated memory was 142.6 MB in the beginning and 349.2 MB in the end (delta: 206.6 MB). Free memory was 103.6 MB in the beginning and 253.3 MB in the end (delta: -149.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:27,852 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 122.7 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:57:27,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 507.81 ms. Allocated memory was 142.6 MB in the beginning and 205.5 MB in the end (delta: 62.9 MB). Free memory was 103.1 MB in the beginning and 180.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:27,854 INFO L168 Benchmark]: Boogie Preprocessor took 65.74 ms. Allocated memory is still 205.5 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:27,854 INFO L168 Benchmark]: RCFGBuilder took 947.90 ms. Allocated memory is still 205.5 MB. Free memory was 177.9 MB in the beginning and 124.2 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:27,855 INFO L168 Benchmark]: TraceAbstraction took 6807.65 ms. Allocated memory was 205.5 MB in the beginning and 349.2 MB in the end (delta: 143.7 MB). Free memory was 123.6 MB in the beginning and 253.3 MB in the end (delta: -129.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:27,858 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 122.7 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 507.81 ms. Allocated memory was 142.6 MB in the beginning and 205.5 MB in the end (delta: 62.9 MB). Free memory was 103.1 MB in the beginning and 180.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.74 ms. Allocated memory is still 205.5 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 947.90 ms. Allocated memory is still 205.5 MB. Free memory was 177.9 MB in the beginning and 124.2 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6807.65 ms. Allocated memory was 205.5 MB in the beginning and 349.2 MB in the end (delta: 143.7 MB). Free memory was 123.6 MB in the beginning and 253.3 MB in the end (delta: -129.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...