/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:57:44,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:57:44,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:57:44,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:57:44,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:57:44,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:57:44,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:57:44,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:57:44,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:57:44,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:57:44,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:57:44,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:57:44,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:57:44,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:57:44,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:57:44,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:57:44,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:57:44,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:57:44,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:57:44,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:57:44,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:57:44,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:57:44,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:57:44,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:57:44,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:57:44,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:57:44,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:57:44,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:57:44,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:57:44,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:57:44,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:57:44,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:57:44,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:57:44,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:57:44,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:57:44,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:57:44,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:57:44,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:57:44,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:57:44,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:57:44,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:57:44,905 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:57:44,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:57:44,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:57:44,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:57:44,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:57:44,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:57:44,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:57:44,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:57:44,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:57:44,907 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:57:44,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:57:44,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:57:44,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:57:44,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:57:44,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:57:44,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:57:44,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:57:44,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:57:44,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:57:44,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:57:44,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:57:44,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:57:44,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:57:44,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:57:44,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:57:44,910 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:57:45,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:57:45,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:57:45,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:57:45,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:57:45,400 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:57:45,401 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-24 14:57:45,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3fc6047da/960dd3c8cc694c7a81b5a999661dae2f/FLAGfa8de37fa [2020-09-24 14:57:46,101 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:57:46,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-24 14:57:46,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3fc6047da/960dd3c8cc694c7a81b5a999661dae2f/FLAGfa8de37fa [2020-09-24 14:57:46,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3fc6047da/960dd3c8cc694c7a81b5a999661dae2f [2020-09-24 14:57:46,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:57:46,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:57:46,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:57:46,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:57:46,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:57:46,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:57:46" (1/1) ... [2020-09-24 14:57:46,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8bb1121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:46, skipping insertion in model container [2020-09-24 14:57:46,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:57:46" (1/1) ... [2020-09-24 14:57:46,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:57:46,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:57:46,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:57:46,783 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:57:46,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:57:47,012 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:57:47,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47 WrapperNode [2020-09-24 14:57:47,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:57:47,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:57:47,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:57:47,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:57:47,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:57:47,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:57:47,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:57:47,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:57:47,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:57:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:57:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:57:47,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-24 14:57:47,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:57:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:57:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 14:57:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:57:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-24 14:57:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-09-24 14:57:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-24 14:57:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:57:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:57:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:57:47,420 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-24 14:57:48,319 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-24 14:57:48,320 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-24 14:57:48,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:57:48,338 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 14:57:48,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:57:48 BoogieIcfgContainer [2020-09-24 14:57:48,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:57:48,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:57:48,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:57:48,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:57:48,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:57:46" (1/3) ... [2020-09-24 14:57:48,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b13482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:57:48, skipping insertion in model container [2020-09-24 14:57:48,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47" (2/3) ... [2020-09-24 14:57:48,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b13482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:57:48, skipping insertion in model container [2020-09-24 14:57:48,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:57:48" (3/3) ... [2020-09-24 14:57:48,359 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-09-24 14:57:48,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:57:48,383 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:57:48,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:57:48,452 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:57:48,453 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:57:48,453 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:57:48,453 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:57:48,453 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:57:48,454 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:57:48,454 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:57:48,454 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:57:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states. [2020-09-24 14:57:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 14:57:48,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:48,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:48,533 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1996743066, now seen corresponding path program 1 times [2020-09-24 14:57:48,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:48,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707651946] [2020-09-24 14:57:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:49,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:49,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707651946] [2020-09-24 14:57:49,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:49,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:57:49,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674663529] [2020-09-24 14:57:49,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:57:49,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:49,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:57:49,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:57:49,167 INFO L87 Difference]: Start difference. First operand 471 states. Second operand 6 states. [2020-09-24 14:57:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:49,662 INFO L93 Difference]: Finished difference Result 897 states and 1196 transitions. [2020-09-24 14:57:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:57:49,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2020-09-24 14:57:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:49,688 INFO L225 Difference]: With dead ends: 897 [2020-09-24 14:57:49,688 INFO L226 Difference]: Without dead ends: 505 [2020-09-24 14:57:49,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:57:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-09-24 14:57:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 490. [2020-09-24 14:57:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-09-24 14:57:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 595 transitions. [2020-09-24 14:57:49,795 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 595 transitions. Word has length 161 [2020-09-24 14:57:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:49,797 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 595 transitions. [2020-09-24 14:57:49,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:57:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 595 transitions. [2020-09-24 14:57:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 14:57:49,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:49,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:49,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:57:49,802 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1547598949, now seen corresponding path program 1 times [2020-09-24 14:57:49,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:49,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559130815] [2020-09-24 14:57:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:50,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559130815] [2020-09-24 14:57:50,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:50,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:57:50,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163309454] [2020-09-24 14:57:50,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:57:50,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:50,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:57:50,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:57:50,146 INFO L87 Difference]: Start difference. First operand 490 states and 595 transitions. Second operand 6 states. [2020-09-24 14:57:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:50,542 INFO L93 Difference]: Finished difference Result 937 states and 1192 transitions. [2020-09-24 14:57:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:57:50,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-09-24 14:57:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:50,549 INFO L225 Difference]: With dead ends: 937 [2020-09-24 14:57:50,549 INFO L226 Difference]: Without dead ends: 573 [2020-09-24 14:57:50,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:57:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-09-24 14:57:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 555. [2020-09-24 14:57:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-09-24 14:57:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 691 transitions. [2020-09-24 14:57:50,580 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 691 transitions. Word has length 169 [2020-09-24 14:57:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:50,581 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 691 transitions. [2020-09-24 14:57:50,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:57:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 691 transitions. [2020-09-24 14:57:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-24 14:57:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:50,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:50,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:57:50,587 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2044458217, now seen corresponding path program 1 times [2020-09-24 14:57:50,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:50,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578304297] [2020-09-24 14:57:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 14:57:50,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578304297] [2020-09-24 14:57:50,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:50,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:50,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943463285] [2020-09-24 14:57:50,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:50,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:50,731 INFO L87 Difference]: Start difference. First operand 555 states and 691 transitions. Second operand 3 states. [2020-09-24 14:57:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:50,849 INFO L93 Difference]: Finished difference Result 987 states and 1256 transitions. [2020-09-24 14:57:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:50,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2020-09-24 14:57:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:50,854 INFO L225 Difference]: With dead ends: 987 [2020-09-24 14:57:50,854 INFO L226 Difference]: Without dead ends: 571 [2020-09-24 14:57:50,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-09-24 14:57:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-09-24 14:57:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-09-24 14:57:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 707 transitions. [2020-09-24 14:57:50,874 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 707 transitions. Word has length 186 [2020-09-24 14:57:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:50,875 INFO L479 AbstractCegarLoop]: Abstraction has 571 states and 707 transitions. [2020-09-24 14:57:50,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 707 transitions. [2020-09-24 14:57:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-24 14:57:50,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:50,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:50,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:57:50,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:50,880 INFO L82 PathProgramCache]: Analyzing trace with hash 570616873, now seen corresponding path program 1 times [2020-09-24 14:57:50,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:50,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201925274] [2020-09-24 14:57:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:50,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201925274] [2020-09-24 14:57:50,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:50,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:50,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563700179] [2020-09-24 14:57:50,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:50,999 INFO L87 Difference]: Start difference. First operand 571 states and 707 transitions. Second operand 3 states. [2020-09-24 14:57:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:51,339 INFO L93 Difference]: Finished difference Result 1044 states and 1347 transitions. [2020-09-24 14:57:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:51,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2020-09-24 14:57:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:51,345 INFO L225 Difference]: With dead ends: 1044 [2020-09-24 14:57:51,346 INFO L226 Difference]: Without dead ends: 628 [2020-09-24 14:57:51,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-09-24 14:57:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 599. [2020-09-24 14:57:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-09-24 14:57:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 744 transitions. [2020-09-24 14:57:51,382 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 744 transitions. Word has length 187 [2020-09-24 14:57:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:51,383 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 744 transitions. [2020-09-24 14:57:51,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 744 transitions. [2020-09-24 14:57:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 14:57:51,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:51,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:51,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:57:51,389 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1436054601, now seen corresponding path program 1 times [2020-09-24 14:57:51,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:51,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811737763] [2020-09-24 14:57:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 14:57:51,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811737763] [2020-09-24 14:57:51,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:51,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:51,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861541973] [2020-09-24 14:57:51,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:51,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,546 INFO L87 Difference]: Start difference. First operand 599 states and 744 transitions. Second operand 3 states. [2020-09-24 14:57:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:51,797 INFO L93 Difference]: Finished difference Result 1084 states and 1380 transitions. [2020-09-24 14:57:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:51,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 195 [2020-09-24 14:57:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:51,803 INFO L225 Difference]: With dead ends: 1084 [2020-09-24 14:57:51,804 INFO L226 Difference]: Without dead ends: 615 [2020-09-24 14:57:51,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-09-24 14:57:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2020-09-24 14:57:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-09-24 14:57:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 760 transitions. [2020-09-24 14:57:51,833 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 760 transitions. Word has length 195 [2020-09-24 14:57:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:51,834 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 760 transitions. [2020-09-24 14:57:51,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 760 transitions. [2020-09-24 14:57:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 14:57:51,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:51,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:51,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:57:51,842 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:51,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1774700262, now seen corresponding path program 1 times [2020-09-24 14:57:51,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:51,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096712019] [2020-09-24 14:57:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 14:57:52,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096712019] [2020-09-24 14:57:52,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:52,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269446331] [2020-09-24 14:57:52,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:52,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:52,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:52,063 INFO L87 Difference]: Start difference. First operand 613 states and 760 transitions. Second operand 4 states. [2020-09-24 14:57:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,284 INFO L93 Difference]: Finished difference Result 1162 states and 1468 transitions. [2020-09-24 14:57:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:52,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 200 [2020-09-24 14:57:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,289 INFO L225 Difference]: With dead ends: 1162 [2020-09-24 14:57:52,290 INFO L226 Difference]: Without dead ends: 704 [2020-09-24 14:57:52,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-09-24 14:57:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 643. [2020-09-24 14:57:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-24 14:57:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 794 transitions. [2020-09-24 14:57:52,315 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 794 transitions. Word has length 200 [2020-09-24 14:57:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,316 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 794 transitions. [2020-09-24 14:57:52,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 794 transitions. [2020-09-24 14:57:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 14:57:52,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:57:52,321 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1774597616, now seen corresponding path program 1 times [2020-09-24 14:57:52,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917300266] [2020-09-24 14:57:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 14:57:52,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917300266] [2020-09-24 14:57:52,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:52,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688974732] [2020-09-24 14:57:52,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:52,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:52,425 INFO L87 Difference]: Start difference. First operand 643 states and 794 transitions. Second operand 4 states. [2020-09-24 14:57:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,690 INFO L93 Difference]: Finished difference Result 1198 states and 1507 transitions. [2020-09-24 14:57:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:52,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2020-09-24 14:57:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,696 INFO L225 Difference]: With dead ends: 1198 [2020-09-24 14:57:52,696 INFO L226 Difference]: Without dead ends: 710 [2020-09-24 14:57:52,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-09-24 14:57:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 635. [2020-09-24 14:57:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-09-24 14:57:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 786 transitions. [2020-09-24 14:57:52,728 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 786 transitions. Word has length 201 [2020-09-24 14:57:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,728 INFO L479 AbstractCegarLoop]: Abstraction has 635 states and 786 transitions. [2020-09-24 14:57:52,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 786 transitions. [2020-09-24 14:57:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-09-24 14:57:52,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:57:52,734 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1625465716, now seen corresponding path program 1 times [2020-09-24 14:57:52,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359275920] [2020-09-24 14:57:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:52,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359275920] [2020-09-24 14:57:52,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:52,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110063611] [2020-09-24 14:57:52,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:52,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,876 INFO L87 Difference]: Start difference. First operand 635 states and 786 transitions. Second operand 3 states. [2020-09-24 14:57:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,044 INFO L93 Difference]: Finished difference Result 1148 states and 1455 transitions. [2020-09-24 14:57:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2020-09-24 14:57:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,050 INFO L225 Difference]: With dead ends: 1148 [2020-09-24 14:57:53,050 INFO L226 Difference]: Without dead ends: 668 [2020-09-24 14:57:53,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-09-24 14:57:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 657. [2020-09-24 14:57:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-09-24 14:57:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 811 transitions. [2020-09-24 14:57:53,070 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 811 transitions. Word has length 202 [2020-09-24 14:57:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,071 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 811 transitions. [2020-09-24 14:57:53,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 811 transitions. [2020-09-24 14:57:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 14:57:53,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:53,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:53,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:57:53,076 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1597515948, now seen corresponding path program 1 times [2020-09-24 14:57:53,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:53,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118265538] [2020-09-24 14:57:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:53,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118265538] [2020-09-24 14:57:53,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:53,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:53,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123032216] [2020-09-24 14:57:53,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:53,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:53,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,183 INFO L87 Difference]: Start difference. First operand 657 states and 811 transitions. Second operand 3 states. [2020-09-24 14:57:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,439 INFO L93 Difference]: Finished difference Result 1640 states and 2094 transitions. [2020-09-24 14:57:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2020-09-24 14:57:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,449 INFO L225 Difference]: With dead ends: 1640 [2020-09-24 14:57:53,449 INFO L226 Difference]: Without dead ends: 1138 [2020-09-24 14:57:53,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-09-24 14:57:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1136. [2020-09-24 14:57:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1136 states. [2020-09-24 14:57:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1420 transitions. [2020-09-24 14:57:53,493 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1420 transitions. Word has length 210 [2020-09-24 14:57:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,494 INFO L479 AbstractCegarLoop]: Abstraction has 1136 states and 1420 transitions. [2020-09-24 14:57:53,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1420 transitions. [2020-09-24 14:57:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-09-24 14:57:53,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:53,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:53,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:57:53,500 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1924666477, now seen corresponding path program 1 times [2020-09-24 14:57:53,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:53,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112826837] [2020-09-24 14:57:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:53,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112826837] [2020-09-24 14:57:53,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:53,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:53,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323157151] [2020-09-24 14:57:53,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:53,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:53,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:53,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:53,660 INFO L87 Difference]: Start difference. First operand 1136 states and 1420 transitions. Second operand 4 states. [2020-09-24 14:57:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:54,163 INFO L93 Difference]: Finished difference Result 3282 states and 4260 transitions. [2020-09-24 14:57:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:54,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-09-24 14:57:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:54,175 INFO L225 Difference]: With dead ends: 3282 [2020-09-24 14:57:54,175 INFO L226 Difference]: Without dead ends: 2213 [2020-09-24 14:57:54,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2020-09-24 14:57:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1172. [2020-09-24 14:57:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-09-24 14:57:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1468 transitions. [2020-09-24 14:57:54,225 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1468 transitions. Word has length 213 [2020-09-24 14:57:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:54,225 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1468 transitions. [2020-09-24 14:57:54,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1468 transitions. [2020-09-24 14:57:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-24 14:57:54,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:54,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:54,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:57:54,231 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:54,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1074238856, now seen corresponding path program 1 times [2020-09-24 14:57:54,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:54,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282761105] [2020-09-24 14:57:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:54,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282761105] [2020-09-24 14:57:54,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:54,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:54,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61821426] [2020-09-24 14:57:54,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:54,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,372 INFO L87 Difference]: Start difference. First operand 1172 states and 1468 transitions. Second operand 3 states. [2020-09-24 14:57:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:54,613 INFO L93 Difference]: Finished difference Result 2297 states and 2945 transitions. [2020-09-24 14:57:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:54,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2020-09-24 14:57:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:54,620 INFO L225 Difference]: With dead ends: 2297 [2020-09-24 14:57:54,620 INFO L226 Difference]: Without dead ends: 1280 [2020-09-24 14:57:54,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2020-09-24 14:57:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1268. [2020-09-24 14:57:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1268 states. [2020-09-24 14:57:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1582 transitions. [2020-09-24 14:57:54,662 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1582 transitions. Word has length 230 [2020-09-24 14:57:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:54,662 INFO L479 AbstractCegarLoop]: Abstraction has 1268 states and 1582 transitions. [2020-09-24 14:57:54,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1582 transitions. [2020-09-24 14:57:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-24 14:57:54,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:54,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:54,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:57:54,669 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1305865704, now seen corresponding path program 1 times [2020-09-24 14:57:54,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:54,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779980894] [2020-09-24 14:57:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:54,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779980894] [2020-09-24 14:57:54,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:54,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:54,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808344698] [2020-09-24 14:57:54,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:54,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,767 INFO L87 Difference]: Start difference. First operand 1268 states and 1582 transitions. Second operand 3 states. [2020-09-24 14:57:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:54,947 INFO L93 Difference]: Finished difference Result 2474 states and 3125 transitions. [2020-09-24 14:57:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:54,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2020-09-24 14:57:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:54,954 INFO L225 Difference]: With dead ends: 2474 [2020-09-24 14:57:54,954 INFO L226 Difference]: Without dead ends: 1361 [2020-09-24 14:57:54,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-09-24 14:57:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1330. [2020-09-24 14:57:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1330 states. [2020-09-24 14:57:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1656 transitions. [2020-09-24 14:57:54,995 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1656 transitions. Word has length 230 [2020-09-24 14:57:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:54,996 INFO L479 AbstractCegarLoop]: Abstraction has 1330 states and 1656 transitions. [2020-09-24 14:57:54,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1656 transitions. [2020-09-24 14:57:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-09-24 14:57:55,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:55,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:55,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:57:55,002 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1647539560, now seen corresponding path program 1 times [2020-09-24 14:57:55,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:55,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392923504] [2020-09-24 14:57:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:55,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392923504] [2020-09-24 14:57:55,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:55,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:55,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090662358] [2020-09-24 14:57:55,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:55,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:55,139 INFO L87 Difference]: Start difference. First operand 1330 states and 1656 transitions. Second operand 3 states. [2020-09-24 14:57:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:55,311 INFO L93 Difference]: Finished difference Result 3083 states and 3902 transitions. [2020-09-24 14:57:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:55,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2020-09-24 14:57:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:55,324 INFO L225 Difference]: With dead ends: 3083 [2020-09-24 14:57:55,325 INFO L226 Difference]: Without dead ends: 1908 [2020-09-24 14:57:55,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-09-24 14:57:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1906. [2020-09-24 14:57:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1906 states. [2020-09-24 14:57:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2384 transitions. [2020-09-24 14:57:55,383 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2384 transitions. Word has length 238 [2020-09-24 14:57:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:55,383 INFO L479 AbstractCegarLoop]: Abstraction has 1906 states and 2384 transitions. [2020-09-24 14:57:55,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2384 transitions. [2020-09-24 14:57:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-09-24 14:57:55,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:55,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:55,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:57:55,391 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1847120940, now seen corresponding path program 1 times [2020-09-24 14:57:55,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:55,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44425955] [2020-09-24 14:57:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 14:57:55,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44425955] [2020-09-24 14:57:55,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:55,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:55,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064030131] [2020-09-24 14:57:55,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:55,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:55,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:55,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:55,496 INFO L87 Difference]: Start difference. First operand 1906 states and 2384 transitions. Second operand 3 states. [2020-09-24 14:57:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:55,648 INFO L93 Difference]: Finished difference Result 3622 states and 4566 transitions. [2020-09-24 14:57:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:55,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-09-24 14:57:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:55,659 INFO L225 Difference]: With dead ends: 3622 [2020-09-24 14:57:55,660 INFO L226 Difference]: Without dead ends: 1871 [2020-09-24 14:57:55,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2020-09-24 14:57:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2020-09-24 14:57:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2020-09-24 14:57:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2338 transitions. [2020-09-24 14:57:55,729 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2338 transitions. Word has length 240 [2020-09-24 14:57:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:55,730 INFO L479 AbstractCegarLoop]: Abstraction has 1869 states and 2338 transitions. [2020-09-24 14:57:55,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2338 transitions. [2020-09-24 14:57:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-24 14:57:55,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:55,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:55,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:57:55,735 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 400073983, now seen corresponding path program 1 times [2020-09-24 14:57:55,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:55,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456838129] [2020-09-24 14:57:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:55,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456838129] [2020-09-24 14:57:55,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:55,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:55,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494628532] [2020-09-24 14:57:55,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:55,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:55,894 INFO L87 Difference]: Start difference. First operand 1869 states and 2338 transitions. Second operand 4 states. [2020-09-24 14:57:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:56,424 INFO L93 Difference]: Finished difference Result 5375 states and 6855 transitions. [2020-09-24 14:57:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:56,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-09-24 14:57:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:56,440 INFO L225 Difference]: With dead ends: 5375 [2020-09-24 14:57:56,441 INFO L226 Difference]: Without dead ends: 3661 [2020-09-24 14:57:56,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2020-09-24 14:57:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 1878. [2020-09-24 14:57:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1878 states. [2020-09-24 14:57:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2347 transitions. [2020-09-24 14:57:56,520 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2347 transitions. Word has length 241 [2020-09-24 14:57:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:56,521 INFO L479 AbstractCegarLoop]: Abstraction has 1878 states and 2347 transitions. [2020-09-24 14:57:56,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2347 transitions. [2020-09-24 14:57:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-24 14:57:56,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:56,527 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:56,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:57:56,527 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash -255766369, now seen corresponding path program 1 times [2020-09-24 14:57:56,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:56,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041938705] [2020-09-24 14:57:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:56,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:56,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041938705] [2020-09-24 14:57:56,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:56,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:56,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876746006] [2020-09-24 14:57:56,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:56,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:56,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:56,637 INFO L87 Difference]: Start difference. First operand 1878 states and 2347 transitions. Second operand 4 states. [2020-09-24 14:57:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:57,064 INFO L93 Difference]: Finished difference Result 5427 states and 6873 transitions. [2020-09-24 14:57:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:57,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-09-24 14:57:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:57,081 INFO L225 Difference]: With dead ends: 5427 [2020-09-24 14:57:57,081 INFO L226 Difference]: Without dead ends: 3680 [2020-09-24 14:57:57,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2020-09-24 14:57:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 1918. [2020-09-24 14:57:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-09-24 14:57:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2409 transitions. [2020-09-24 14:57:57,176 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2409 transitions. Word has length 241 [2020-09-24 14:57:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:57,176 INFO L479 AbstractCegarLoop]: Abstraction has 1918 states and 2409 transitions. [2020-09-24 14:57:57,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2409 transitions. [2020-09-24 14:57:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 14:57:57,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:57,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:57,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:57:57,182 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:57,183 INFO L82 PathProgramCache]: Analyzing trace with hash -460241056, now seen corresponding path program 1 times [2020-09-24 14:57:57,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:57,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401542631] [2020-09-24 14:57:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 14:57:57,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401542631] [2020-09-24 14:57:57,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:57,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:57,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837664178] [2020-09-24 14:57:57,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:57,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:57,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:57,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:57,394 INFO L87 Difference]: Start difference. First operand 1918 states and 2409 transitions. Second operand 4 states. [2020-09-24 14:57:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:57,867 INFO L93 Difference]: Finished difference Result 4553 states and 5817 transitions. [2020-09-24 14:57:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:57,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-09-24 14:57:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:57,880 INFO L225 Difference]: With dead ends: 4553 [2020-09-24 14:57:57,881 INFO L226 Difference]: Without dead ends: 2760 [2020-09-24 14:57:57,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2020-09-24 14:57:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 1425. [2020-09-24 14:57:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1425 states. [2020-09-24 14:57:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1761 transitions. [2020-09-24 14:57:57,940 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1761 transitions. Word has length 244 [2020-09-24 14:57:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:57,940 INFO L479 AbstractCegarLoop]: Abstraction has 1425 states and 1761 transitions. [2020-09-24 14:57:57,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1761 transitions. [2020-09-24 14:57:57,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-09-24 14:57:57,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:57,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:57,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:57:57,945 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1274309676, now seen corresponding path program 1 times [2020-09-24 14:57:57,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:57,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882369296] [2020-09-24 14:57:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:58,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:58,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882369296] [2020-09-24 14:57:58,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:58,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:58,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588584330] [2020-09-24 14:57:58,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:58,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:58,065 INFO L87 Difference]: Start difference. First operand 1425 states and 1761 transitions. Second operand 3 states. [2020-09-24 14:57:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:58,247 INFO L93 Difference]: Finished difference Result 2821 states and 3513 transitions. [2020-09-24 14:57:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:58,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2020-09-24 14:57:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:58,255 INFO L225 Difference]: With dead ends: 2821 [2020-09-24 14:57:58,255 INFO L226 Difference]: Without dead ends: 1551 [2020-09-24 14:57:58,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2020-09-24 14:57:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1521. [2020-09-24 14:57:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1521 states. [2020-09-24 14:57:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1869 transitions. [2020-09-24 14:57:58,299 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1869 transitions. Word has length 251 [2020-09-24 14:57:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:58,299 INFO L479 AbstractCegarLoop]: Abstraction has 1521 states and 1869 transitions. [2020-09-24 14:57:58,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1869 transitions. [2020-09-24 14:57:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-09-24 14:57:58,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:58,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:58,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:57:58,305 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:58,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1565810676, now seen corresponding path program 1 times [2020-09-24 14:57:58,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:58,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077817679] [2020-09-24 14:57:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:58,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:58,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077817679] [2020-09-24 14:57:58,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:58,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:58,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064925520] [2020-09-24 14:57:58,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:58,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:58,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:58,450 INFO L87 Difference]: Start difference. First operand 1521 states and 1869 transitions. Second operand 4 states. [2020-09-24 14:57:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:58,993 INFO L93 Difference]: Finished difference Result 4339 states and 5411 transitions. [2020-09-24 14:57:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:58,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 259 [2020-09-24 14:57:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:59,022 INFO L225 Difference]: With dead ends: 4339 [2020-09-24 14:57:59,022 INFO L226 Difference]: Without dead ends: 2961 [2020-09-24 14:57:59,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2020-09-24 14:57:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1543. [2020-09-24 14:57:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-24 14:57:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 1901 transitions. [2020-09-24 14:57:59,078 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 1901 transitions. Word has length 259 [2020-09-24 14:57:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:59,078 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 1901 transitions. [2020-09-24 14:57:59,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 1901 transitions. [2020-09-24 14:57:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-09-24 14:57:59,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:59,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:59,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 14:57:59,082 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1099402533, now seen corresponding path program 1 times [2020-09-24 14:57:59,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:59,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886341829] [2020-09-24 14:57:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:59,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 14:57:59,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886341829] [2020-09-24 14:57:59,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:59,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:59,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694224602] [2020-09-24 14:57:59,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:59,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:59,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:59,199 INFO L87 Difference]: Start difference. First operand 1543 states and 1901 transitions. Second operand 3 states. [2020-09-24 14:57:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:59,369 INFO L93 Difference]: Finished difference Result 3074 states and 3825 transitions. [2020-09-24 14:57:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:59,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2020-09-24 14:57:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:59,390 INFO L225 Difference]: With dead ends: 3074 [2020-09-24 14:57:59,390 INFO L226 Difference]: Without dead ends: 1686 [2020-09-24 14:57:59,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-09-24 14:57:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1609. [2020-09-24 14:57:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-09-24 14:57:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 1979 transitions. [2020-09-24 14:57:59,463 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 1979 transitions. Word has length 263 [2020-09-24 14:57:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:59,464 INFO L479 AbstractCegarLoop]: Abstraction has 1609 states and 1979 transitions. [2020-09-24 14:57:59,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 1979 transitions. [2020-09-24 14:57:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-24 14:57:59,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:59,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:59,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 14:57:59,468 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:59,469 INFO L82 PathProgramCache]: Analyzing trace with hash -962704645, now seen corresponding path program 1 times [2020-09-24 14:57:59,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:59,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899555593] [2020-09-24 14:57:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:59,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-09-24 14:57:59,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899555593] [2020-09-24 14:57:59,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:59,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:59,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976250072] [2020-09-24 14:57:59,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:59,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:59,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:59,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:59,592 INFO L87 Difference]: Start difference. First operand 1609 states and 1979 transitions. Second operand 3 states. [2020-09-24 14:57:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:59,651 INFO L93 Difference]: Finished difference Result 3095 states and 3839 transitions. [2020-09-24 14:57:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:59,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2020-09-24 14:57:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:59,656 INFO L225 Difference]: With dead ends: 3095 [2020-09-24 14:57:59,657 INFO L226 Difference]: Without dead ends: 1641 [2020-09-24 14:57:59,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-09-24 14:57:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1637. [2020-09-24 14:57:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1637 states. [2020-09-24 14:57:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2011 transitions. [2020-09-24 14:57:59,707 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2011 transitions. Word has length 271 [2020-09-24 14:57:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:59,708 INFO L479 AbstractCegarLoop]: Abstraction has 1637 states and 2011 transitions. [2020-09-24 14:57:59,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2011 transitions. [2020-09-24 14:57:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-09-24 14:57:59,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:59,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:59,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 14:57:59,714 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1268615101, now seen corresponding path program 1 times [2020-09-24 14:57:59,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:59,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585813553] [2020-09-24 14:57:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:59,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 14:57:59,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585813553] [2020-09-24 14:57:59,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:59,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:59,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35607164] [2020-09-24 14:57:59,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:59,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:59,908 INFO L87 Difference]: Start difference. First operand 1637 states and 2011 transitions. Second operand 4 states. [2020-09-24 14:58:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:00,310 INFO L93 Difference]: Finished difference Result 4705 states and 5841 transitions. [2020-09-24 14:58:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:58:00,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 272 [2020-09-24 14:58:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:00,317 INFO L225 Difference]: With dead ends: 4705 [2020-09-24 14:58:00,317 INFO L226 Difference]: Without dead ends: 3223 [2020-09-24 14:58:00,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2020-09-24 14:58:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 1643. [2020-09-24 14:58:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2020-09-24 14:58:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2017 transitions. [2020-09-24 14:58:00,371 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2017 transitions. Word has length 272 [2020-09-24 14:58:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:00,372 INFO L479 AbstractCegarLoop]: Abstraction has 1643 states and 2017 transitions. [2020-09-24 14:58:00,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:58:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2017 transitions. [2020-09-24 14:58:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-09-24 14:58:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:00,377 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:00,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 14:58:00,377 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash 794458964, now seen corresponding path program 1 times [2020-09-24 14:58:00,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:00,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944520917] [2020-09-24 14:58:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:00,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-09-24 14:58:00,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944520917] [2020-09-24 14:58:00,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:00,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:58:00,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811051293] [2020-09-24 14:58:00,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:58:00,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:58:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:00,491 INFO L87 Difference]: Start difference. First operand 1643 states and 2017 transitions. Second operand 3 states. [2020-09-24 14:58:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:00,552 INFO L93 Difference]: Finished difference Result 4573 states and 5675 transitions. [2020-09-24 14:58:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:58:00,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2020-09-24 14:58:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:00,558 INFO L225 Difference]: With dead ends: 4573 [2020-09-24 14:58:00,558 INFO L226 Difference]: Without dead ends: 3085 [2020-09-24 14:58:00,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2020-09-24 14:58:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 1645. [2020-09-24 14:58:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-09-24 14:58:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2019 transitions. [2020-09-24 14:58:00,614 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2019 transitions. Word has length 299 [2020-09-24 14:58:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:00,614 INFO L479 AbstractCegarLoop]: Abstraction has 1645 states and 2019 transitions. [2020-09-24 14:58:00,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:58:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2019 transitions. [2020-09-24 14:58:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-09-24 14:58:00,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:00,619 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:00,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 14:58:00,620 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1359318092, now seen corresponding path program 1 times [2020-09-24 14:58:00,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:00,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800753748] [2020-09-24 14:58:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-24 14:58:00,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800753748] [2020-09-24 14:58:00,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:00,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:58:00,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647991885] [2020-09-24 14:58:00,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:58:00,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:58:00,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:00,788 INFO L87 Difference]: Start difference. First operand 1645 states and 2019 transitions. Second operand 3 states. [2020-09-24 14:58:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:00,973 INFO L93 Difference]: Finished difference Result 3276 states and 4059 transitions. [2020-09-24 14:58:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:58:00,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2020-09-24 14:58:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:00,977 INFO L225 Difference]: With dead ends: 3276 [2020-09-24 14:58:00,977 INFO L226 Difference]: Without dead ends: 1786 [2020-09-24 14:58:00,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2020-09-24 14:58:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1725. [2020-09-24 14:58:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1725 states. [2020-09-24 14:58:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2113 transitions. [2020-09-24 14:58:01,022 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2113 transitions. Word has length 299 [2020-09-24 14:58:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:01,022 INFO L479 AbstractCegarLoop]: Abstraction has 1725 states and 2113 transitions. [2020-09-24 14:58:01,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:58:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2113 transitions. [2020-09-24 14:58:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-09-24 14:58:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:01,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:01,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 14:58:01,027 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash 893866712, now seen corresponding path program 1 times [2020-09-24 14:58:01,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:01,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471062241] [2020-09-24 14:58:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:01,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 14:58:01,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471062241] [2020-09-24 14:58:01,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:58:01,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:58:01,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713860078] [2020-09-24 14:58:01,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:58:01,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:58:01,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:58:01,171 INFO L87 Difference]: Start difference. First operand 1725 states and 2113 transitions. Second operand 4 states. [2020-09-24 14:58:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:01,451 INFO L93 Difference]: Finished difference Result 3667 states and 4517 transitions. [2020-09-24 14:58:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:58:01,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 302 [2020-09-24 14:58:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:01,456 INFO L225 Difference]: With dead ends: 3667 [2020-09-24 14:58:01,457 INFO L226 Difference]: Without dead ends: 1993 [2020-09-24 14:58:01,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-09-24 14:58:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1951. [2020-09-24 14:58:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1951 states. [2020-09-24 14:58:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2383 transitions. [2020-09-24 14:58:01,503 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2383 transitions. Word has length 302 [2020-09-24 14:58:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:01,504 INFO L479 AbstractCegarLoop]: Abstraction has 1951 states and 2383 transitions. [2020-09-24 14:58:01,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:58:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2383 transitions. [2020-09-24 14:58:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-09-24 14:58:01,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:01,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:01,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 14:58:01,509 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -444397713, now seen corresponding path program 1 times [2020-09-24 14:58:01,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:01,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495752633] [2020-09-24 14:58:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:01,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 86 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-24 14:58:01,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495752633] [2020-09-24 14:58:01,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:58:01,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:58:01,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925235009] [2020-09-24 14:58:01,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:58:01,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:58:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:58:01,658 INFO L87 Difference]: Start difference. First operand 1951 states and 2383 transitions. Second operand 4 states. [2020-09-24 14:58:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:02,016 INFO L93 Difference]: Finished difference Result 4774 states and 5863 transitions. [2020-09-24 14:58:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:58:02,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2020-09-24 14:58:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:02,044 INFO L225 Difference]: With dead ends: 4774 [2020-09-24 14:58:02,044 INFO L226 Difference]: Without dead ends: 2886 [2020-09-24 14:58:02,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2020-09-24 14:58:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2374. [2020-09-24 14:58:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-09-24 14:58:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 2904 transitions. [2020-09-24 14:58:02,104 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 2904 transitions. Word has length 306 [2020-09-24 14:58:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:02,105 INFO L479 AbstractCegarLoop]: Abstraction has 2374 states and 2904 transitions. [2020-09-24 14:58:02,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:58:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 2904 transitions. [2020-09-24 14:58:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-09-24 14:58:02,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:02,110 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:02,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 14:58:02,111 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:02,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1267878306, now seen corresponding path program 1 times [2020-09-24 14:58:02,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:02,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985355074] [2020-09-24 14:58:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-24 14:58:02,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985355074] [2020-09-24 14:58:02,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:02,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:58:02,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019208091] [2020-09-24 14:58:02,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:58:02,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:02,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:58:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:58:02,291 INFO L87 Difference]: Start difference. First operand 2374 states and 2904 transitions. Second operand 4 states. [2020-09-24 14:58:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:02,784 INFO L93 Difference]: Finished difference Result 6751 states and 8361 transitions. [2020-09-24 14:58:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:58:02,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-09-24 14:58:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:02,793 INFO L225 Difference]: With dead ends: 6751 [2020-09-24 14:58:02,793 INFO L226 Difference]: Without dead ends: 4506 [2020-09-24 14:58:02,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2020-09-24 14:58:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2422. [2020-09-24 14:58:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2020-09-24 14:58:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2964 transitions. [2020-09-24 14:58:02,860 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2964 transitions. Word has length 309 [2020-09-24 14:58:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:02,860 INFO L479 AbstractCegarLoop]: Abstraction has 2422 states and 2964 transitions. [2020-09-24 14:58:02,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:58:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2964 transitions. [2020-09-24 14:58:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-09-24 14:58:02,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:02,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:02,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 14:58:02,865 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash -747447560, now seen corresponding path program 1 times [2020-09-24 14:58:02,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:02,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890184569] [2020-09-24 14:58:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:02,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 14:58:03,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890184569] [2020-09-24 14:58:03,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:58:03,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:58:03,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285953600] [2020-09-24 14:58:03,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:58:03,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:03,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:58:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:03,019 INFO L87 Difference]: Start difference. First operand 2422 states and 2964 transitions. Second operand 5 states. [2020-09-24 14:58:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:03,688 INFO L93 Difference]: Finished difference Result 6975 states and 8625 transitions. [2020-09-24 14:58:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:58:03,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2020-09-24 14:58:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:03,697 INFO L225 Difference]: With dead ends: 6975 [2020-09-24 14:58:03,697 INFO L226 Difference]: Without dead ends: 4604 [2020-09-24 14:58:03,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:58:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2020-09-24 14:58:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 2356. [2020-09-24 14:58:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2356 states. [2020-09-24 14:58:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 2892 transitions. [2020-09-24 14:58:03,769 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 2892 transitions. Word has length 310 [2020-09-24 14:58:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:03,769 INFO L479 AbstractCegarLoop]: Abstraction has 2356 states and 2892 transitions. [2020-09-24 14:58:03,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:58:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 2892 transitions. [2020-09-24 14:58:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-09-24 14:58:03,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:03,774 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:03,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 14:58:03,774 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1909019013, now seen corresponding path program 1 times [2020-09-24 14:58:03,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:03,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230649923] [2020-09-24 14:58:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:03,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-09-24 14:58:03,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230649923] [2020-09-24 14:58:03,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:03,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:58:03,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875086545] [2020-09-24 14:58:03,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:58:03,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:58:03,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:58:03,925 INFO L87 Difference]: Start difference. First operand 2356 states and 2892 transitions. Second operand 4 states. [2020-09-24 14:58:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:04,200 INFO L93 Difference]: Finished difference Result 4839 states and 5953 transitions. [2020-09-24 14:58:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:58:04,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 316 [2020-09-24 14:58:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:04,206 INFO L225 Difference]: With dead ends: 4839 [2020-09-24 14:58:04,207 INFO L226 Difference]: Without dead ends: 2638 [2020-09-24 14:58:04,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2020-09-24 14:58:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2182. [2020-09-24 14:58:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2182 states. [2020-09-24 14:58:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2683 transitions. [2020-09-24 14:58:04,269 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2683 transitions. Word has length 316 [2020-09-24 14:58:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:04,270 INFO L479 AbstractCegarLoop]: Abstraction has 2182 states and 2683 transitions. [2020-09-24 14:58:04,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:58:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2683 transitions. [2020-09-24 14:58:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-24 14:58:04,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:04,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:04,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 14:58:04,275 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1455323989, now seen corresponding path program 1 times [2020-09-24 14:58:04,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:04,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846621151] [2020-09-24 14:58:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:04,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-09-24 14:58:04,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846621151] [2020-09-24 14:58:04,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:04,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:58:04,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915669615] [2020-09-24 14:58:04,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:58:04,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:58:04,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:04,453 INFO L87 Difference]: Start difference. First operand 2182 states and 2683 transitions. Second operand 3 states. [2020-09-24 14:58:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:04,560 INFO L93 Difference]: Finished difference Result 6128 states and 7596 transitions. [2020-09-24 14:58:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:58:04,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-09-24 14:58:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:04,568 INFO L225 Difference]: With dead ends: 6128 [2020-09-24 14:58:04,568 INFO L226 Difference]: Without dead ends: 4101 [2020-09-24 14:58:04,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2020-09-24 14:58:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 4097. [2020-09-24 14:58:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4097 states. [2020-09-24 14:58:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 5063 transitions. [2020-09-24 14:58:04,698 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 5063 transitions. Word has length 328 [2020-09-24 14:58:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:04,699 INFO L479 AbstractCegarLoop]: Abstraction has 4097 states and 5063 transitions. [2020-09-24 14:58:04,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:58:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 5063 transitions. [2020-09-24 14:58:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-09-24 14:58:04,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:04,707 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:04,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-24 14:58:04,708 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:04,708 INFO L82 PathProgramCache]: Analyzing trace with hash 837433633, now seen corresponding path program 1 times [2020-09-24 14:58:04,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:04,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713065195] [2020-09-24 14:58:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:04,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-09-24 14:58:04,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713065195] [2020-09-24 14:58:04,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:04,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:58:04,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172456409] [2020-09-24 14:58:04,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:58:04,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:58:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:04,903 INFO L87 Difference]: Start difference. First operand 4097 states and 5063 transitions. Second operand 3 states. [2020-09-24 14:58:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:05,152 INFO L93 Difference]: Finished difference Result 8155 states and 10119 transitions. [2020-09-24 14:58:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:58:05,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-09-24 14:58:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:05,159 INFO L225 Difference]: With dead ends: 8155 [2020-09-24 14:58:05,159 INFO L226 Difference]: Without dead ends: 4213 [2020-09-24 14:58:05,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2020-09-24 14:58:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4189. [2020-09-24 14:58:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4189 states. [2020-09-24 14:58:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4189 states to 4189 states and 5155 transitions. [2020-09-24 14:58:05,295 INFO L78 Accepts]: Start accepts. Automaton has 4189 states and 5155 transitions. Word has length 329 [2020-09-24 14:58:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:05,296 INFO L479 AbstractCegarLoop]: Abstraction has 4189 states and 5155 transitions. [2020-09-24 14:58:05,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:58:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4189 states and 5155 transitions. [2020-09-24 14:58:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-09-24 14:58:05,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:05,302 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:05,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-24 14:58:05,302 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1972793019, now seen corresponding path program 1 times [2020-09-24 14:58:05,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:05,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676145766] [2020-09-24 14:58:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:05,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-09-24 14:58:05,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676145766] [2020-09-24 14:58:05,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:05,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:58:05,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162015484] [2020-09-24 14:58:05,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:58:05,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:58:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:05,505 INFO L87 Difference]: Start difference. First operand 4189 states and 5155 transitions. Second operand 3 states. [2020-09-24 14:58:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:05,738 INFO L93 Difference]: Finished difference Result 12117 states and 14971 transitions. [2020-09-24 14:58:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:58:05,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-09-24 14:58:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:05,748 INFO L225 Difference]: With dead ends: 12117 [2020-09-24 14:58:05,748 INFO L226 Difference]: Without dead ends: 8083 [2020-09-24 14:58:05,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2020-09-24 14:58:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 4185. [2020-09-24 14:58:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4185 states. [2020-09-24 14:58:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 5147 transitions. [2020-09-24 14:58:05,910 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 5147 transitions. Word has length 331 [2020-09-24 14:58:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:05,910 INFO L479 AbstractCegarLoop]: Abstraction has 4185 states and 5147 transitions. [2020-09-24 14:58:05,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:58:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 5147 transitions. [2020-09-24 14:58:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-09-24 14:58:05,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:05,918 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:05,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-24 14:58:05,919 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -522042299, now seen corresponding path program 1 times [2020-09-24 14:58:05,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:05,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048779225] [2020-09-24 14:58:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:58:05,974 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:58:05,974 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:58:05,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-24 14:58:06,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:58:06 BoogieIcfgContainer [2020-09-24 14:58:06,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:58:06,026 INFO L168 Benchmark]: Toolchain (without parser) took 19653.92 ms. Allocated memory was 138.9 MB in the beginning and 758.1 MB in the end (delta: 619.2 MB). Free memory was 102.0 MB in the beginning and 105.4 MB in the end (delta: -3.4 MB). Peak memory consumption was 615.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:06,027 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 14:58:06,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.82 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.3 MB in the beginning and 176.7 MB in the end (delta: -75.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:06,028 INFO L168 Benchmark]: Boogie Preprocessor took 77.01 ms. Allocated memory is still 202.4 MB. Free memory was 176.7 MB in the beginning and 173.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:06,028 INFO L168 Benchmark]: RCFGBuilder took 1257.04 ms. Allocated memory is still 202.4 MB. Free memory was 173.9 MB in the beginning and 95.4 MB in the end (delta: 78.5 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:06,029 INFO L168 Benchmark]: TraceAbstraction took 17673.34 ms. Allocated memory was 202.4 MB in the beginning and 758.1 MB in the end (delta: 555.7 MB). Free memory was 95.4 MB in the beginning and 105.4 MB in the end (delta: -10.1 MB). Peak memory consumption was 545.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:06,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 637.82 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.3 MB in the beginning and 176.7 MB in the end (delta: -75.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.01 ms. Allocated memory is still 202.4 MB. Free memory was 176.7 MB in the beginning and 173.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1257.04 ms. Allocated memory is still 202.4 MB. Free memory was 173.9 MB in the beginning and 95.4 MB in the end (delta: 78.5 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17673.34 ms. Allocated memory was 202.4 MB in the beginning and 758.1 MB in the end (delta: 555.7 MB). Free memory was 95.4 MB in the beginning and 105.4 MB in the end (delta: -10.1 MB). Peak memory consumption was 545.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L702] int s ; [L703] int tmp ; [L707] s = 8464 [L708] CALL ssl3_accept(s) [L12] int s__info_callback = __VERIFIER_nondet_int() ; [L13] int s__in_handshake = __VERIFIER_nondet_int() ; [L14] int s__state ; [L15] int s__new_session ; [L16] int s__server ; [L17] int s__version = __VERIFIER_nondet_int() ; [L18] int s__type ; [L19] int s__init_num ; [L20] int s__hit = __VERIFIER_nondet_int() ; [L21] int s__rwstate ; [L22] int s__init_buf___0 = 1; [L23] int s__debug = __VERIFIER_nondet_int() ; [L24] int s__shutdown ; [L25] int s__cert = __VERIFIER_nondet_int() ; [L26] int s__options = __VERIFIER_nondet_int() ; [L27] int s__verify_mode = __VERIFIER_nondet_int() ; [L28] int s__session__peer = __VERIFIER_nondet_int() ; [L29] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L30] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L34] int s__s3__tmp__cert_request ; [L35] int s__s3__tmp__reuse_message ; [L36] int s__s3__tmp__use_rsa_tmp ; [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__new_cipher__algorithms ; [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_cipher__algo_strength ; [L41] int s__session__cipher ; [L42] int buf ; [L43] unsigned long l ; [L44] unsigned long Time ; [L45] unsigned long tmp ; [L46] int cb ; [L47] long num1 = __VERIFIER_nondet_long() ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int got_new_session ; [L53] int tmp___1 = __VERIFIER_nondet_int() ; [L54] int tmp___2 = __VERIFIER_nondet_int() ; [L55] int tmp___3 = __VERIFIER_nondet_int() ; [L56] int tmp___4 = __VERIFIER_nondet_int() ; [L57] int tmp___5 = __VERIFIER_nondet_int() ; [L58] int tmp___6 = __VERIFIER_nondet_int() ; [L59] int tmp___7 ; [L60] long tmp___8 = __VERIFIER_nondet_long() ; [L61] int tmp___9 = __VERIFIER_nondet_int() ; [L62] int tmp___10 = __VERIFIER_nondet_int() ; [L63] int blastFlag ; [L64] int __cil_tmp55 ; [L65] unsigned long __cil_tmp56 ; [L66] unsigned long __cil_tmp57 ; [L67] unsigned long __cil_tmp58 ; [L68] unsigned long __cil_tmp59 ; [L69] int __cil_tmp60 ; [L70] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] __cil_tmp56 = 256345 [L307] skip = 1 [L318] s__state = 8528 [L319] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L323] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L324] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L326] __cil_tmp57 = (unsigned long )s__options [L327] COND TRUE __cil_tmp57 + 2097152UL [L328] s__s3__tmp__use_rsa_tmp = 1 [L333] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(blastFlag == 3) [L365] COND FALSE !(ret <= 0) [L382] s__state = 8544 [L383] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND TRUE s__state == 8544 [L387] COND TRUE s__verify_mode + 1 [L388] COND TRUE s__session__peer != 0 [L389] COND TRUE s__verify_mode + 4 [L390] s__verify_mode = 123 [L391] skip = 1 [L392] s__s3__tmp__cert_request = 0 [L393] s__state = 8560 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND TRUE s__state == 8560 [L437] ret = __VERIFIER_nondet_int() [L438] COND FALSE !(ret <= 0) [L441] s__s3__tmp__next_state___0 = 8576 [L442] s__state = 8448 [L443] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND TRUE ! s__s3__tmp__reuse_message [L653] COND TRUE ! skip [L654] COND TRUE state == 8560 [L655] COND TRUE s__state == 8448 [L656] COND TRUE s__verify_mode != -1 [L657] COND TRUE s__verify_mode != -2 [L658] COND TRUE __cil_tmp61 != 9021 [L659] COND TRUE __cil_tmp58 != 4294967294 [L660] COND TRUE blastFlag != 4 [L661] COND TRUE tmp___7 != 1024 [L697] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 471 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.5s, OverallIterations: 33, TraceHistogramMax: 6, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20438 SDtfs, 12801 SDslu, 22036 SDs, 0 SdLazy, 5119 SolverSat, 726 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 224 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4189occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 32 MinimizatonAttempts, 20059 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 8366 NumberOfCodeBlocks, 8366 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 8001 ConstructedInterpolants, 0 QuantifiedInterpolants, 2735745 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 32 InterpolantComputations, 29 PerfectInterpolantSequences, 2828/2842 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...