/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 false -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-eb0fd7c [2020-09-21 10:20:27,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:27,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:27,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:27,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:27,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:27,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:27,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:27,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:27,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:27,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:27,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:27,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:27,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:27,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:27,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:27,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:27,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:27,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:27,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:27,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:27,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:27,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:27,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:27,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:27,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:27,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:27,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:27,966 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 [2020-09-21 10:20:27,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:27,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:27,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:27,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:27,993 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:27,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:27,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:27,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:27,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:27,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:27,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:27,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:27,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:27,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:27,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:27,996 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:27,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:27,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:27,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:27,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:27,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:27,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:27,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:27,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:27,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:27,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:27,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:27,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:27,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:27,999 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 -> false [2020-09-21 10:20:28,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:28,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:28,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:28,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:28,509 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:28,511 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-09-21 10:20:28,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1801112d3/fd5c904333e240ff8e1b01ec6e413d70/FLAG78714174d [2020-09-21 10:20:29,215 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:29,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-09-21 10:20:29,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1801112d3/fd5c904333e240ff8e1b01ec6e413d70/FLAG78714174d [2020-09-21 10:20:29,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1801112d3/fd5c904333e240ff8e1b01ec6e413d70 [2020-09-21 10:20:29,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:29,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:29,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:29,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:29,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:29,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:29" (1/1) ... [2020-09-21 10:20:29,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32333996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:29, skipping insertion in model container [2020-09-21 10:20:29,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:29" (1/1) ... [2020-09-21 10:20:29,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:29,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:29,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:29,952 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:30,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:30,163 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:30,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30 WrapperNode [2020-09-21 10:20:30,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:30,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:30,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:30,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:30,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (1/1) ... [2020-09-21 10:20:30,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:30,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:30,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:30,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:30,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (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 [2020-09-21 10:20:30,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:30,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:30,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-21 10:20:30,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:20:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-21 10:20:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-21 10:20:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:30,501 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:31,092 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-21 10:20:31,093 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-21 10:20:31,107 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:31,107 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:31,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:31 BoogieIcfgContainer [2020-09-21 10:20:31,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:31,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:31,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:31,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:31,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:29" (1/3) ... [2020-09-21 10:20:31,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1081d582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:31, skipping insertion in model container [2020-09-21 10:20:31,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:30" (2/3) ... [2020-09-21 10:20:31,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1081d582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:31, skipping insertion in model container [2020-09-21 10:20:31,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:31" (3/3) ... [2020-09-21 10:20:31,125 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-09-21 10:20:31,138 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:31,149 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:31,173 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:31,207 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:31,207 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:31,207 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:31,207 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:31,207 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:31,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:31,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:31,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-09-21 10:20:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:31,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:31,249 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] [2020-09-21 10:20:31,249 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-09-21 10:20:31,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:31,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96741695] [2020-09-21 10:20:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:31,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96741695] [2020-09-21 10:20:31,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:31,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:31,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523704651] [2020-09-21 10:20:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:31,638 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-09-21 10:20:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:32,159 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-09-21 10:20:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:32,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-21 10:20:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:32,186 INFO L225 Difference]: With dead ends: 375 [2020-09-21 10:20:32,187 INFO L226 Difference]: Without dead ends: 194 [2020-09-21 10:20:32,196 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 [2020-09-21 10:20:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-21 10:20:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-09-21 10:20:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-21 10:20:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-09-21 10:20:32,306 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-09-21 10:20:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:32,307 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-09-21 10:20:32,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-09-21 10:20:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:20:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:32,310 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] [2020-09-21 10:20:32,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:32,311 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-09-21 10:20:32,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:32,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182005823] [2020-09-21 10:20:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:32,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182005823] [2020-09-21 10:20:32,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:32,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:32,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390433119] [2020-09-21 10:20:32,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:32,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:32,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:32,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:32,455 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-09-21 10:20:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:32,803 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-09-21 10:20:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:32,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-21 10:20:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:32,808 INFO L225 Difference]: With dead ends: 448 [2020-09-21 10:20:32,808 INFO L226 Difference]: Without dead ends: 260 [2020-09-21 10:20:32,813 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 [2020-09-21 10:20:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-21 10:20:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-09-21 10:20:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-09-21 10:20:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-09-21 10:20:32,855 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-09-21 10:20:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:32,856 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-09-21 10:20:32,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-09-21 10:20:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 10:20:32,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:32,858 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] [2020-09-21 10:20:32,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:32,858 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:32,860 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-09-21 10:20:32,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:32,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556911686] [2020-09-21 10:20:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:32,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556911686] [2020-09-21 10:20:32,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:32,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:32,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352522580] [2020-09-21 10:20:32,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:32,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:32,980 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-09-21 10:20:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,016 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-09-21 10:20:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:33,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-09-21 10:20:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,021 INFO L225 Difference]: With dead ends: 698 [2020-09-21 10:20:33,021 INFO L226 Difference]: Without dead ends: 466 [2020-09-21 10:20:33,023 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 [2020-09-21 10:20:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-09-21 10:20:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-09-21 10:20:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-09-21 10:20:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-09-21 10:20:33,053 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-09-21 10:20:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,054 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-09-21 10:20:33,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-09-21 10:20:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 10:20:33,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,056 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] [2020-09-21 10:20:33,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:33,056 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-09-21 10:20:33,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071002296] [2020-09-21 10:20:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071002296] [2020-09-21 10:20:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:20:33,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100028651] [2020-09-21 10:20:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:20:33,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:20:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:33,181 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-09-21 10:20:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,567 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-09-21 10:20:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:20:33,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 10:20:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,574 INFO L225 Difference]: With dead ends: 1155 [2020-09-21 10:20:33,574 INFO L226 Difference]: Without dead ends: 655 [2020-09-21 10:20:33,577 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 [2020-09-21 10:20:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-09-21 10:20:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-09-21 10:20:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-09-21 10:20:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-09-21 10:20:33,612 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-09-21 10:20:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,612 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-09-21 10:20:33,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:20:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-09-21 10:20:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:20:33,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,622 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] [2020-09-21 10:20:33,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:33,623 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-09-21 10:20:33,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229335030] [2020-09-21 10:20:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229335030] [2020-09-21 10:20:33,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:33,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393067665] [2020-09-21 10:20:33,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:33,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:33,717 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-09-21 10:20:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,737 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-09-21 10:20:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:33,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-09-21 10:20:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,741 INFO L225 Difference]: With dead ends: 1038 [2020-09-21 10:20:33,741 INFO L226 Difference]: Without dead ends: 526 [2020-09-21 10:20:33,743 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 [2020-09-21 10:20:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-09-21 10:20:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-09-21 10:20:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-09-21 10:20:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-09-21 10:20:33,764 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-09-21 10:20:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,764 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-09-21 10:20:33,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-09-21 10:20:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:20:33,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,766 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] [2020-09-21 10:20:33,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:33,767 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-09-21 10:20:33,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959946343] [2020-09-21 10:20:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959946343] [2020-09-21 10:20:33,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:33,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081705109] [2020-09-21 10:20:33,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:33,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:33,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:33,823 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-09-21 10:20:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:33,875 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-09-21 10:20:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:33,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-09-21 10:20:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:33,881 INFO L225 Difference]: With dead ends: 1048 [2020-09-21 10:20:33,882 INFO L226 Difference]: Without dead ends: 536 [2020-09-21 10:20:33,883 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 [2020-09-21 10:20:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-21 10:20:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-09-21 10:20:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-09-21 10:20:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-09-21 10:20:33,909 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-09-21 10:20:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,910 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-09-21 10:20:33,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-09-21 10:20:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 10:20:33,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,913 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] [2020-09-21 10:20:33,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:33,914 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-09-21 10:20:33,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207579954] [2020-09-21 10:20:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207579954] [2020-09-21 10:20:33,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:33,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700778390] [2020-09-21 10:20:33,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:33,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:33,995 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-09-21 10:20:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,246 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-09-21 10:20:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:34,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-09-21 10:20:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,252 INFO L225 Difference]: With dead ends: 1234 [2020-09-21 10:20:34,253 INFO L226 Difference]: Without dead ends: 670 [2020-09-21 10:20:34,254 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 [2020-09-21 10:20:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-21 10:20:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-09-21 10:20:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-09-21 10:20:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-09-21 10:20:34,282 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-09-21 10:20:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:34,282 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-09-21 10:20:34,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-09-21 10:20:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:20:34,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,284 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] [2020-09-21 10:20:34,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:34,285 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-09-21 10:20:34,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387156468] [2020-09-21 10:20:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:34,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387156468] [2020-09-21 10:20:34,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:34,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:34,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546197263] [2020-09-21 10:20:34,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:34,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:34,362 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-09-21 10:20:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,423 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-09-21 10:20:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:34,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-09-21 10:20:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,432 INFO L225 Difference]: With dead ends: 1720 [2020-09-21 10:20:34,433 INFO L226 Difference]: Without dead ends: 1149 [2020-09-21 10:20:34,435 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 [2020-09-21 10:20:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-09-21 10:20:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-09-21 10:20:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-09-21 10:20:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-09-21 10:20:34,481 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-09-21 10:20:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:34,483 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-09-21 10:20:34,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-09-21 10:20:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:20:34,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,484 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] [2020-09-21 10:20:34,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:34,485 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-09-21 10:20:34,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212690390] [2020-09-21 10:20:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:34,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212690390] [2020-09-21 10:20:34,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:34,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:34,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172594928] [2020-09-21 10:20:34,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:34,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:34,574 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-09-21 10:20:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:34,637 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-09-21 10:20:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:34,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-09-21 10:20:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:34,646 INFO L225 Difference]: With dead ends: 2602 [2020-09-21 10:20:34,647 INFO L226 Difference]: Without dead ends: 1734 [2020-09-21 10:20:34,649 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 [2020-09-21 10:20:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-09-21 10:20:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-09-21 10:20:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-09-21 10:20:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-09-21 10:20:34,718 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-09-21 10:20:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:34,718 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-09-21 10:20:34,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-09-21 10:20:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 10:20:34,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:34,720 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] [2020-09-21 10:20:34,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:34,721 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-09-21 10:20:34,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:34,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627580647] [2020-09-21 10:20:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:34,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627580647] [2020-09-21 10:20:34,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:34,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:34,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669959720] [2020-09-21 10:20:34,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:34,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:34,813 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-09-21 10:20:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,010 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-09-21 10:20:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:35,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-09-21 10:20:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,021 INFO L225 Difference]: With dead ends: 3635 [2020-09-21 10:20:35,021 INFO L226 Difference]: Without dead ends: 1924 [2020-09-21 10:20:35,024 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 [2020-09-21 10:20:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-09-21 10:20:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-09-21 10:20:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-09-21 10:20:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-09-21 10:20:35,093 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-09-21 10:20:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,093 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-09-21 10:20:35,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-09-21 10:20:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:20:35,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,095 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] [2020-09-21 10:20:35,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:35,096 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-09-21 10:20:35,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991972577] [2020-09-21 10:20:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:35,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991972577] [2020-09-21 10:20:35,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:35,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698911176] [2020-09-21 10:20:35,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:35,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:35,149 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-09-21 10:20:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,373 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-09-21 10:20:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:35,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-09-21 10:20:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,384 INFO L225 Difference]: With dead ends: 3747 [2020-09-21 10:20:35,384 INFO L226 Difference]: Without dead ends: 1933 [2020-09-21 10:20:35,388 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 [2020-09-21 10:20:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-09-21 10:20:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-09-21 10:20:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-09-21 10:20:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-09-21 10:20:35,473 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-09-21 10:20:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,474 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-09-21 10:20:35,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-09-21 10:20:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:20:35,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,476 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] [2020-09-21 10:20:35,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:35,476 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-09-21 10:20:35,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848422300] [2020-09-21 10:20:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:35,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848422300] [2020-09-21 10:20:35,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:35,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811980111] [2020-09-21 10:20:35,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:35,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:35,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:35,576 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-09-21 10:20:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,770 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-09-21 10:20:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:35,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-09-21 10:20:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,780 INFO L225 Difference]: With dead ends: 3744 [2020-09-21 10:20:35,780 INFO L226 Difference]: Without dead ends: 1930 [2020-09-21 10:20:35,784 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 [2020-09-21 10:20:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-09-21 10:20:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-09-21 10:20:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-09-21 10:20:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-09-21 10:20:35,851 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-09-21 10:20:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,852 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-09-21 10:20:35,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-09-21 10:20:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 10:20:35,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,854 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] [2020-09-21 10:20:35,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:35,854 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-09-21 10:20:35,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519865575] [2020-09-21 10:20:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:35,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519865575] [2020-09-21 10:20:35,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:35,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538740378] [2020-09-21 10:20:35,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:35,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:35,924 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-09-21 10:20:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,125 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-09-21 10:20:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-09-21 10:20:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,135 INFO L225 Difference]: With dead ends: 3741 [2020-09-21 10:20:36,136 INFO L226 Difference]: Without dead ends: 1891 [2020-09-21 10:20:36,140 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 [2020-09-21 10:20:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-09-21 10:20:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-09-21 10:20:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-09-21 10:20:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-09-21 10:20:36,223 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-09-21 10:20:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,224 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-09-21 10:20:36,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-09-21 10:20:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:20:36,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,226 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] [2020-09-21 10:20:36,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:36,227 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,227 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-09-21 10:20:36,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292122036] [2020-09-21 10:20:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292122036] [2020-09-21 10:20:36,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804686980] [2020-09-21 10:20:36,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,368 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-09-21 10:20:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,646 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-09-21 10:20:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-09-21 10:20:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,659 INFO L225 Difference]: With dead ends: 3810 [2020-09-21 10:20:36,660 INFO L226 Difference]: Without dead ends: 1960 [2020-09-21 10:20:36,666 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 [2020-09-21 10:20:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-09-21 10:20:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-09-21 10:20:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-09-21 10:20:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-09-21 10:20:36,782 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-09-21 10:20:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,783 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-09-21 10:20:36,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-09-21 10:20:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 10:20:36,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,790 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] [2020-09-21 10:20:36,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:36,791 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-09-21 10:20:36,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678507723] [2020-09-21 10:20:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678507723] [2020-09-21 10:20:36,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714762783] [2020-09-21 10:20:36,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,899 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-09-21 10:20:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,192 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-09-21 10:20:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-09-21 10:20:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,206 INFO L225 Difference]: With dead ends: 3946 [2020-09-21 10:20:37,207 INFO L226 Difference]: Without dead ends: 2096 [2020-09-21 10:20:37,215 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 [2020-09-21 10:20:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-09-21 10:20:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-09-21 10:20:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-09-21 10:20:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-09-21 10:20:37,346 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-09-21 10:20:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,346 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-09-21 10:20:37,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-09-21 10:20:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:20:37,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,349 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] [2020-09-21 10:20:37,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:37,349 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-09-21 10:20:37,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754637977] [2020-09-21 10:20:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 10:20:37,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754637977] [2020-09-21 10:20:37,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324462065] [2020-09-21 10:20:37,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,422 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-09-21 10:20:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,770 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-09-21 10:20:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-09-21 10:20:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,783 INFO L225 Difference]: With dead ends: 4276 [2020-09-21 10:20:37,783 INFO L226 Difference]: Without dead ends: 2293 [2020-09-21 10:20:37,787 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 [2020-09-21 10:20:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-09-21 10:20:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-09-21 10:20:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-09-21 10:20:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-09-21 10:20:37,871 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-09-21 10:20:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,872 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-09-21 10:20:37,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-09-21 10:20:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:20:37,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,874 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] [2020-09-21 10:20:37,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:37,874 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-09-21 10:20:37,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42182965] [2020-09-21 10:20:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 10:20:37,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42182965] [2020-09-21 10:20:37,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413904878] [2020-09-21 10:20:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,951 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-09-21 10:20:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,027 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-09-21 10:20:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-09-21 10:20:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,044 INFO L225 Difference]: With dead ends: 4420 [2020-09-21 10:20:38,044 INFO L226 Difference]: Without dead ends: 2947 [2020-09-21 10:20:38,048 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 [2020-09-21 10:20:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-09-21 10:20:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-09-21 10:20:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-09-21 10:20:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-09-21 10:20:38,165 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-09-21 10:20:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,165 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-09-21 10:20:38,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-09-21 10:20:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 10:20:38,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,167 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] [2020-09-21 10:20:38,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:38,168 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-09-21 10:20:38,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314002372] [2020-09-21 10:20:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:20:38,200 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:20:38,200 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:20:38,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:38,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:38 BoogieIcfgContainer [2020-09-21 10:20:38,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:38,271 INFO L168 Benchmark]: Toolchain (without parser) took 8731.36 ms. Allocated memory was 140.0 MB in the beginning and 332.4 MB in the end (delta: 192.4 MB). Free memory was 102.7 MB in the beginning and 138.3 MB in the end (delta: -35.6 MB). Peak memory consumption was 156.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:38,275 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:20:38,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 628.30 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 178.3 MB in the end (delta: -76.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:38,280 INFO L168 Benchmark]: Boogie Preprocessor took 64.82 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 175.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:38,280 INFO L168 Benchmark]: RCFGBuilder took 884.69 ms. Allocated memory is still 203.4 MB. Free memory was 175.6 MB in the beginning and 122.4 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:38,281 INFO L168 Benchmark]: TraceAbstraction took 7141.21 ms. Allocated memory was 203.4 MB in the beginning and 332.4 MB in the end (delta: 129.0 MB). Free memory was 121.7 MB in the beginning and 138.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 112.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:38,287 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 628.30 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 178.3 MB in the end (delta: -76.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.82 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 175.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 884.69 ms. Allocated memory is still 203.4 MB. Free memory was 175.6 MB in the beginning and 122.4 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7141.21 ms. Allocated memory was 203.4 MB in the beginning and 332.4 MB in the end (delta: 129.0 MB). Free memory was 121.7 MB in the beginning and 138.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 112.3 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: 7.0s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.8s, 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: 1.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.9s 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...