/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 0.1.25-89f541c [2020-08-27 21:50:41,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:41,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:41,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:41,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:41,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:41,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:41,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:41,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:41,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:41,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:41,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:41,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:41,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:41,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:41,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:41,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:41,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:41,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:41,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:41,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:41,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:41,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:41,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:41,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:50:41,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:50:41,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:50:41,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:50:41,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:50:41,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:50:41,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:50:41,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:50:41,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:50:41,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:50:41,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:50:41,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:50:41,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:50:41,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:50:41,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:41,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:41,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:41,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-27 21:50:41,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:41,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:41,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:41,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:41,830 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:41,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:41,831 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:41,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:41,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:41,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:41,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:41,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:41,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:41,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:41,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:41,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:41,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:41,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:41,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:41,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:41,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:41,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:41,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:41,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:41,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:41,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:41,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:41,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:41,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:41,836 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 [2020-08-27 21:50:42,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:42,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:42,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:42,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:42,368 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:42,370 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-27 21:50:42,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ada5f0df/fed1b60e76144f36a7d6701abd7e4dc0/FLAG0f5211e8a [2020-08-27 21:50:43,073 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:43,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-27 21:50:43,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ada5f0df/fed1b60e76144f36a7d6701abd7e4dc0/FLAG0f5211e8a [2020-08-27 21:50:43,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ada5f0df/fed1b60e76144f36a7d6701abd7e4dc0 [2020-08-27 21:50:43,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:43,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:43,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:43,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:43,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:43,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:43,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16575b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43, skipping insertion in model container [2020-08-27 21:50:43,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:43,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:43,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:43,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:43,785 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:43,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:43,975 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:43,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43 WrapperNode [2020-08-27 21:50:43,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:43,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:43,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:43,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:43,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:43,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:44,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:44,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:44,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:44,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:44,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... [2020-08-27 21:50:44,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:44,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:44,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:44,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:44,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:44,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:44,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:44,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-27 21:50:44,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-27 21:50:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-27 21:50:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-27 21:50:44,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:44,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:44,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:44,403 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:44,967 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-27 21:50:44,968 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-27 21:50:44,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:44,982 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:50:44,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:44 BoogieIcfgContainer [2020-08-27 21:50:44,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:44,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:44,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:44,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:44,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:43" (1/3) ... [2020-08-27 21:50:44,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa0610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:44, skipping insertion in model container [2020-08-27 21:50:44,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:43" (2/3) ... [2020-08-27 21:50:44,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa0610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:44, skipping insertion in model container [2020-08-27 21:50:44,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:44" (3/3) ... [2020-08-27 21:50:45,001 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-27 21:50:45,014 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:45,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:45,050 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:45,083 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:45,083 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:45,083 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:45,083 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:45,084 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:45,084 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:45,084 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:45,084 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-27 21:50:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:50:45,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:45,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:45,121 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-27 21:50:45,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:45,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455572308] [2020-08-27 21:50:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:45,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:45,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455572308] [2020-08-27 21:50:45,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:45,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:50:45,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674630729] [2020-08-27 21:50:45,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:50:45,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:50:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:50:45,510 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-27 21:50:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:46,021 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-27 21:50:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:50:46,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-27 21:50:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:46,043 INFO L225 Difference]: With dead ends: 375 [2020-08-27 21:50:46,043 INFO L226 Difference]: Without dead ends: 194 [2020-08-27 21:50:46,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-27 21:50:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-27 21:50:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-27 21:50:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-27 21:50:46,124 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-27 21:50:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:46,124 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-27 21:50:46,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:50:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-27 21:50:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:50:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:46,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:46,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:46,127 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-27 21:50:46,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:46,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250859341] [2020-08-27 21:50:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:46,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250859341] [2020-08-27 21:50:46,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:46,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:50:46,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227955516] [2020-08-27 21:50:46,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:50:46,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:50:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:50:46,260 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-27 21:50:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:46,663 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-27 21:50:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:50:46,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-27 21:50:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:46,671 INFO L225 Difference]: With dead ends: 448 [2020-08-27 21:50:46,672 INFO L226 Difference]: Without dead ends: 260 [2020-08-27 21:50:46,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-27 21:50:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-27 21:50:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-27 21:50:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-27 21:50:46,722 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-27 21:50:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:46,723 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-27 21:50:46,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:50:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-27 21:50:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-27 21:50:46,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:46,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:46,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:46,727 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-27 21:50:46,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:46,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612753491] [2020-08-27 21:50:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:46,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612753491] [2020-08-27 21:50:46,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:46,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:46,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548090206] [2020-08-27 21:50:46,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:46,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:46,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:46,882 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-27 21:50:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:46,949 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-27 21:50:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:46,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-27 21:50:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:46,955 INFO L225 Difference]: With dead ends: 698 [2020-08-27 21:50:46,956 INFO L226 Difference]: Without dead ends: 466 [2020-08-27 21:50:46,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-27 21:50:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-27 21:50:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-27 21:50:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-27 21:50:47,018 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-27 21:50:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:47,018 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-27 21:50:47,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-27 21:50:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-27 21:50:47,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:47,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:47,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:47,021 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:47,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:47,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-27 21:50:47,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:47,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125189946] [2020-08-27 21:50:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:47,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125189946] [2020-08-27 21:50:47,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:47,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:50:47,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975921361] [2020-08-27 21:50:47,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:50:47,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:50:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:47,111 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-27 21:50:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:47,465 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-27 21:50:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:50:47,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-27 21:50:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:47,470 INFO L225 Difference]: With dead ends: 1155 [2020-08-27 21:50:47,470 INFO L226 Difference]: Without dead ends: 655 [2020-08-27 21:50:47,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:50:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-27 21:50:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-27 21:50:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-27 21:50:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-27 21:50:47,498 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-27 21:50:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:47,499 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-27 21:50:47,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:50:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-27 21:50:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-27 21:50:47,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:47,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:47,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:47,503 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-27 21:50:47,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:47,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146001130] [2020-08-27 21:50:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:47,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146001130] [2020-08-27 21:50:47,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:47,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:47,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004621969] [2020-08-27 21:50:47,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:47,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:47,607 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-27 21:50:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:47,629 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-27 21:50:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:47,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-27 21:50:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:47,633 INFO L225 Difference]: With dead ends: 1038 [2020-08-27 21:50:47,633 INFO L226 Difference]: Without dead ends: 526 [2020-08-27 21:50:47,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-27 21:50:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-27 21:50:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-27 21:50:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-27 21:50:47,657 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-27 21:50:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:47,659 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-27 21:50:47,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-27 21:50:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-27 21:50:47,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:47,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:47,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:47,663 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-27 21:50:47,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:47,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926755619] [2020-08-27 21:50:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:47,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926755619] [2020-08-27 21:50:47,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:47,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:47,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749260023] [2020-08-27 21:50:47,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:47,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:47,722 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-27 21:50:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:47,761 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-27 21:50:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:47,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-27 21:50:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:47,766 INFO L225 Difference]: With dead ends: 1048 [2020-08-27 21:50:47,766 INFO L226 Difference]: Without dead ends: 536 [2020-08-27 21:50:47,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-27 21:50:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-27 21:50:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-27 21:50:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-27 21:50:47,790 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-27 21:50:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:47,791 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-27 21:50:47,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-27 21:50:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-27 21:50:47,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:47,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:47,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:47,794 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:47,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-27 21:50:47,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:47,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104014884] [2020-08-27 21:50:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:47,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104014884] [2020-08-27 21:50:47,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:47,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:47,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252982868] [2020-08-27 21:50:47,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:47,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:47,849 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-27 21:50:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:48,149 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-27 21:50:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:48,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-27 21:50:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:48,155 INFO L225 Difference]: With dead ends: 1234 [2020-08-27 21:50:48,155 INFO L226 Difference]: Without dead ends: 670 [2020-08-27 21:50:48,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-27 21:50:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-27 21:50:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-27 21:50:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-27 21:50:48,193 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-27 21:50:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:48,193 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-27 21:50:48,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-27 21:50:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-27 21:50:48,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:48,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:48,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:50:48,196 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-27 21:50:48,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:48,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369593242] [2020-08-27 21:50:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:48,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:48,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369593242] [2020-08-27 21:50:48,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:48,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:48,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784426122] [2020-08-27 21:50:48,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:48,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:48,282 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-27 21:50:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:48,341 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-27 21:50:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:48,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-27 21:50:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:48,353 INFO L225 Difference]: With dead ends: 1720 [2020-08-27 21:50:48,354 INFO L226 Difference]: Without dead ends: 1149 [2020-08-27 21:50:48,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-27 21:50:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-27 21:50:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-27 21:50:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-27 21:50:48,411 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-27 21:50:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:48,412 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-27 21:50:48,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-27 21:50:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-27 21:50:48,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:48,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:48,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:50:48,415 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-27 21:50:48,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:48,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596184769] [2020-08-27 21:50:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:48,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:48,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596184769] [2020-08-27 21:50:48,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:48,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:48,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262110923] [2020-08-27 21:50:48,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:48,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:48,532 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-27 21:50:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:48,616 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-27 21:50:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:48,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-27 21:50:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:48,628 INFO L225 Difference]: With dead ends: 2602 [2020-08-27 21:50:48,628 INFO L226 Difference]: Without dead ends: 1734 [2020-08-27 21:50:48,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-27 21:50:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-27 21:50:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-27 21:50:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-27 21:50:48,709 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-27 21:50:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:48,710 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-27 21:50:48,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-27 21:50:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-27 21:50:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:48,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:48,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:50:48,714 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-27 21:50:48,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:48,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168227661] [2020-08-27 21:50:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:48,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:48,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168227661] [2020-08-27 21:50:48,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:48,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:48,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7300256] [2020-08-27 21:50:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:48,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:48,803 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-27 21:50:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:49,030 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-27 21:50:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:49,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-27 21:50:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:49,041 INFO L225 Difference]: With dead ends: 3635 [2020-08-27 21:50:49,042 INFO L226 Difference]: Without dead ends: 1924 [2020-08-27 21:50:49,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:49,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-27 21:50:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-27 21:50:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-27 21:50:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-27 21:50:49,126 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-27 21:50:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:49,127 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-27 21:50:49,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-27 21:50:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-27 21:50:49,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:49,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:49,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:50:49,129 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:49,130 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-27 21:50:49,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:49,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541922285] [2020-08-27 21:50:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:49,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541922285] [2020-08-27 21:50:49,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:49,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:49,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976009886] [2020-08-27 21:50:49,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:49,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:49,185 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-27 21:50:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:49,469 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-27 21:50:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:49,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-27 21:50:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:49,481 INFO L225 Difference]: With dead ends: 3747 [2020-08-27 21:50:49,481 INFO L226 Difference]: Without dead ends: 1933 [2020-08-27 21:50:49,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-27 21:50:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-27 21:50:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-27 21:50:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-27 21:50:49,584 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-27 21:50:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:49,585 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-27 21:50:49,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-27 21:50:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-27 21:50:49,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:49,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:49,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:50:49,587 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-27 21:50:49,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:49,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376433636] [2020-08-27 21:50:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:49,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376433636] [2020-08-27 21:50:49,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:49,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:49,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547659803] [2020-08-27 21:50:49,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:49,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:49,677 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-27 21:50:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:49,903 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-27 21:50:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:49,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-27 21:50:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:49,913 INFO L225 Difference]: With dead ends: 3744 [2020-08-27 21:50:49,913 INFO L226 Difference]: Without dead ends: 1930 [2020-08-27 21:50:49,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-27 21:50:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-27 21:50:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-27 21:50:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-27 21:50:49,989 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-27 21:50:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:49,989 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-27 21:50:49,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-27 21:50:49,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-27 21:50:49,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:49,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:49,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:50:49,991 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-27 21:50:49,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:49,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313570070] [2020-08-27 21:50:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:50,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313570070] [2020-08-27 21:50:50,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:50,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:50,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782335358] [2020-08-27 21:50:50,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:50,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:50,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,044 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-27 21:50:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:50,260 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-27 21:50:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:50,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-27 21:50:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:50,270 INFO L225 Difference]: With dead ends: 3741 [2020-08-27 21:50:50,270 INFO L226 Difference]: Without dead ends: 1891 [2020-08-27 21:50:50,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-27 21:50:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-27 21:50:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-27 21:50:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-27 21:50:50,345 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-27 21:50:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:50,346 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-27 21:50:50,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-27 21:50:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-27 21:50:50,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:50,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:50:50,348 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-27 21:50:50,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632163169] [2020-08-27 21:50:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:50,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632163169] [2020-08-27 21:50:50,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:50,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:50,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537512771] [2020-08-27 21:50:50,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:50,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:50,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:50,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,405 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-27 21:50:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:50,640 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-27 21:50:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:50,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-27 21:50:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:50,650 INFO L225 Difference]: With dead ends: 3810 [2020-08-27 21:50:50,650 INFO L226 Difference]: Without dead ends: 1960 [2020-08-27 21:50:50,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-27 21:50:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-27 21:50:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-27 21:50:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-27 21:50:50,726 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-27 21:50:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:50,726 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-27 21:50:50,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-27 21:50:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-27 21:50:50,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:50,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:50:50,728 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-27 21:50:50,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590933701] [2020-08-27 21:50:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:50,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590933701] [2020-08-27 21:50:50,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:50,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:50,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121781766] [2020-08-27 21:50:50,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:50,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,786 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-27 21:50:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,026 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-27 21:50:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-27 21:50:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,038 INFO L225 Difference]: With dead ends: 3946 [2020-08-27 21:50:51,038 INFO L226 Difference]: Without dead ends: 2096 [2020-08-27 21:50:51,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-27 21:50:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-27 21:50:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-27 21:50:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-27 21:50:51,118 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-27 21:50:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,119 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-27 21:50:51,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-27 21:50:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-27 21:50:51,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,120 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:50:51,121 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-27 21:50:51,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173604550] [2020-08-27 21:50:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-27 21:50:51,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173604550] [2020-08-27 21:50:51,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40466] [2020-08-27 21:50:51,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,164 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-27 21:50:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,540 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-27 21:50:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-27 21:50:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,556 INFO L225 Difference]: With dead ends: 4276 [2020-08-27 21:50:51,556 INFO L226 Difference]: Without dead ends: 2293 [2020-08-27 21:50:51,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-27 21:50:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-27 21:50:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-27 21:50:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-27 21:50:51,688 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-27 21:50:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,688 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-27 21:50:51,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-27 21:50:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-27 21:50:51,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:50:51,692 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-27 21:50:51,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987377930] [2020-08-27 21:50:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-27 21:50:51,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987377930] [2020-08-27 21:50:51,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475896598] [2020-08-27 21:50:51,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,758 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-27 21:50:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,868 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-27 21:50:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-27 21:50:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,888 INFO L225 Difference]: With dead ends: 4420 [2020-08-27 21:50:51,888 INFO L226 Difference]: Without dead ends: 2947 [2020-08-27 21:50:51,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-27 21:50:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-27 21:50:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-27 21:50:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-27 21:50:52,028 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-27 21:50:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,028 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-27 21:50:52,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-27 21:50:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-27 21:50:52,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:50:52,032 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-27 21:50:52,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972462890] [2020-08-27 21:50:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:50:52,064 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:50:52,064 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:50:52,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:50:52,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:50:52 BoogieIcfgContainer [2020-08-27 21:50:52,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:50:52,106 INFO L168 Benchmark]: Toolchain (without parser) took 8717.00 ms. Allocated memory was 139.5 MB in the beginning and 328.2 MB in the end (delta: 188.7 MB). Free memory was 102.0 MB in the beginning and 146.2 MB in the end (delta: -44.1 MB). Peak memory consumption was 144.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:52,107 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:50:52,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.03 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 101.8 MB in the beginning and 176.8 MB in the end (delta: -75.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:52,108 INFO L168 Benchmark]: Boogie Preprocessor took 71.40 ms. Allocated memory is still 201.9 MB. Free memory was 176.8 MB in the beginning and 173.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:52,109 INFO L168 Benchmark]: RCFGBuilder took 941.02 ms. Allocated memory is still 201.9 MB. Free memory was 173.4 MB in the beginning and 120.7 MB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:52,110 INFO L168 Benchmark]: TraceAbstraction took 7110.56 ms. Allocated memory was 201.9 MB in the beginning and 328.2 MB in the end (delta: 126.4 MB). Free memory was 120.0 MB in the beginning and 146.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:52,112 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 588.03 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 101.8 MB in the beginning and 176.8 MB in the end (delta: -75.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.40 ms. Allocated memory is still 201.9 MB. Free memory was 176.8 MB in the beginning and 173.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 941.02 ms. Allocated memory is still 201.9 MB. Free memory was 173.4 MB in the beginning and 120.7 MB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7110.56 ms. Allocated memory was 201.9 MB in the beginning and 328.2 MB in the end (delta: 126.4 MB). Free memory was 120.0 MB in the beginning and 146.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 4.0s, 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, 2.0s 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, 0.4s SatisfiabilityAnalysisTime, 0.8s 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...