/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:56:41,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:56:41,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:56:41,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:56:41,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:56:41,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:56:41,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:56:41,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:56:41,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:56:41,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:56:41,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:56:41,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:56:41,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:56:41,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:56:41,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:56:41,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:56:41,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:56:41,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:56:41,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:56:41,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:56:41,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:56:41,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:56:41,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:56:41,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:56:41,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:56:41,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:56:41,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:56:41,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:56:41,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:56:41,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:56:41,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:56:41,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:56:41,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:56:41,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:56:41,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:56:41,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:56:41,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:56:41,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:56:41,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:56:41,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:56:41,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:56:41,519 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 [2020-09-25 00:56:41,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:56:41,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:56:41,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:56:41,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:56:41,573 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:56:41,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:56:41,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:56:41,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:56:41,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:56:41,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:56:41,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:56:41,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:56:41,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:56:41,577 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:56:41,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:56:41,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:56:41,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:56:41,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:56:41,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:56:41,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:56:41,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:56:41,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:56:41,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:56:41,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:56:41,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:56:41,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:56:41,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:56:41,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:56:41,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:56:41,580 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 00:56:42,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:56:42,095 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:56:42,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:56:42,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:56:42,102 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:56:42,103 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-25 00:56:42,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d274caaa1/45cc8503e58649e5acce77606e4044d5/FLAG0873e476a [2020-09-25 00:56:42,787 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:56:42,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-25 00:56:42,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d274caaa1/45cc8503e58649e5acce77606e4044d5/FLAG0873e476a [2020-09-25 00:56:43,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d274caaa1/45cc8503e58649e5acce77606e4044d5 [2020-09-25 00:56:43,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:56:43,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:56:43,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:56:43,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:56:43,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:56:43,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377d8449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43, skipping insertion in model container [2020-09-25 00:56:43,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:56:43,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:56:43,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:56:43,506 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:56:43,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:56:43,683 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:56:43,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43 WrapperNode [2020-09-25 00:56:43,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:56:43,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:56:43,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:56:43,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:56:43,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... [2020-09-25 00:56:43,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:56:43,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:56:43,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:56:43,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:56:43,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:56:43,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:56:43,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:56:43,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-25 00:56:43,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:56:43,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:56:43,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 00:56:43,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:56:43,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-25 00:56:43,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-09-25 00:56:43,841 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-25 00:56:43,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:56:43,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:56:43,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:56:44,078 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-25 00:56:44,826 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-25 00:56:44,826 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-25 00:56:44,845 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:56:44,846 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:56:44,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:56:44 BoogieIcfgContainer [2020-09-25 00:56:44,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:56:44,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:56:44,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:56:44,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:56:44,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:56:43" (1/3) ... [2020-09-25 00:56:44,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670e7646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:56:44, skipping insertion in model container [2020-09-25 00:56:44,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:56:43" (2/3) ... [2020-09-25 00:56:44,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670e7646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:56:44, skipping insertion in model container [2020-09-25 00:56:44,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:56:44" (3/3) ... [2020-09-25 00:56:44,866 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-09-25 00:56:44,878 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:56:44,890 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:56:44,914 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:56:44,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:56:44,951 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:56:44,951 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:56:44,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:56:44,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:56:44,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:56:44,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:56:44,952 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:56:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states. [2020-09-25 00:56:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 00:56:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:45,023 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] [2020-09-25 00:56:45,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1996743066, now seen corresponding path program 1 times [2020-09-25 00:56:45,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:45,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586110161] [2020-09-25 00:56:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:45,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:46,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-25 00:56:46,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:56:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-09-25 00:56:46,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:56:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-09-25 00:56:46,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:56:46,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:56:46,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:46,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:46,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:46,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:46,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586110161] [2020-09-25 00:56:46,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:46,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:56:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912092728] [2020-09-25 00:56:46,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:56:46,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:47,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:56:47,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:56:47,019 INFO L87 Difference]: Start difference. First operand 471 states. Second operand 3 states. [2020-09-25 00:56:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:47,370 INFO L93 Difference]: Finished difference Result 864 states and 1153 transitions. [2020-09-25 00:56:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:56:47,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-09-25 00:56:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:47,395 INFO L225 Difference]: With dead ends: 864 [2020-09-25 00:56:47,395 INFO L226 Difference]: Without dead ends: 452 [2020-09-25 00:56:47,403 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 [2020-09-25 00:56:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-09-25 00:56:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2020-09-25 00:56:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-09-25 00:56:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 545 transitions. [2020-09-25 00:56:47,488 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 545 transitions. Word has length 161 [2020-09-25 00:56:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:47,489 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 545 transitions. [2020-09-25 00:56:47,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:56:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 545 transitions. [2020-09-25 00:56:47,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-25 00:56:47,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:47,495 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] [2020-09-25 00:56:47,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:56:47,496 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:47,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1376475421, now seen corresponding path program 1 times [2020-09-25 00:56:47,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:47,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972478367] [2020-09-25 00:56:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:47,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:47,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:48,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:48,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-09-25 00:56:48,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:48,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-09-25 00:56:48,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:56:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-09-25 00:56:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 00:56:48,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:48,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:48,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:48,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:48,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:48,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:48,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:48,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:48,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:48,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:48,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:48,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:48,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972478367] [2020-09-25 00:56:48,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:48,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:56:48,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557766785] [2020-09-25 00:56:48,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:56:48,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:56:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:56:48,340 INFO L87 Difference]: Start difference. First operand 450 states and 545 transitions. Second operand 4 states. [2020-09-25 00:56:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:48,590 INFO L93 Difference]: Finished difference Result 835 states and 1035 transitions. [2020-09-25 00:56:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:56:48,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-09-25 00:56:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:48,595 INFO L225 Difference]: With dead ends: 835 [2020-09-25 00:56:48,595 INFO L226 Difference]: Without dead ends: 524 [2020-09-25 00:56:48,597 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 [2020-09-25 00:56:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-09-25 00:56:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 488. [2020-09-25 00:56:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-09-25 00:56:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 588 transitions. [2020-09-25 00:56:48,619 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 588 transitions. Word has length 166 [2020-09-25 00:56:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:48,619 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 588 transitions. [2020-09-25 00:56:48,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:56:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 588 transitions. [2020-09-25 00:56:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-25 00:56:48,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:48,623 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] [2020-09-25 00:56:48,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:56:48,623 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:48,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1922098023, now seen corresponding path program 1 times [2020-09-25 00:56:48,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:48,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419002489] [2020-09-25 00:56:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:48,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:48,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:49,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:50,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:50,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-25 00:56:50,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:56:50,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-09-25 00:56:50,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:56:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-25 00:56:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:56:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:50,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:50,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:50,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:50,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:50,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:50,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:50,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419002489] [2020-09-25 00:56:50,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:50,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:56:50,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976468146] [2020-09-25 00:56:50,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:56:50,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:56:50,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:56:50,670 INFO L87 Difference]: Start difference. First operand 488 states and 588 transitions. Second operand 3 states. [2020-09-25 00:56:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:50,917 INFO L93 Difference]: Finished difference Result 898 states and 1135 transitions. [2020-09-25 00:56:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:56:50,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2020-09-25 00:56:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:50,922 INFO L225 Difference]: With dead ends: 898 [2020-09-25 00:56:50,922 INFO L226 Difference]: Without dead ends: 549 [2020-09-25 00:56:50,923 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 [2020-09-25 00:56:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-09-25 00:56:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 533. [2020-09-25 00:56:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-09-25 00:56:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 657 transitions. [2020-09-25 00:56:50,940 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 657 transitions. Word has length 167 [2020-09-25 00:56:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:50,941 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 657 transitions. [2020-09-25 00:56:50,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:56:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 657 transitions. [2020-09-25 00:56:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-25 00:56:50,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:50,944 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] [2020-09-25 00:56:50,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:56:50,944 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1422568045, now seen corresponding path program 1 times [2020-09-25 00:56:50,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:50,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500493110] [2020-09-25 00:56:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:51,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:51,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:51,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-25 00:56:51,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:51,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-09-25 00:56:51,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:56:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-09-25 00:56:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 00:56:51,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:51,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:51,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:51,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:51,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:51,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:51,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:51,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:51,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500493110] [2020-09-25 00:56:51,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:51,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:56:51,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96558250] [2020-09-25 00:56:51,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:56:51,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:56:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:56:51,628 INFO L87 Difference]: Start difference. First operand 533 states and 657 transitions. Second operand 4 states. [2020-09-25 00:56:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:51,910 INFO L93 Difference]: Finished difference Result 964 states and 1220 transitions. [2020-09-25 00:56:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:56:51,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2020-09-25 00:56:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:51,914 INFO L225 Difference]: With dead ends: 964 [2020-09-25 00:56:51,914 INFO L226 Difference]: Without dead ends: 570 [2020-09-25 00:56:51,916 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 [2020-09-25 00:56:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-09-25 00:56:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-09-25 00:56:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-09-25 00:56:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 685 transitions. [2020-09-25 00:56:51,932 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 685 transitions. Word has length 167 [2020-09-25 00:56:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:51,932 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 685 transitions. [2020-09-25 00:56:51,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:56:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 685 transitions. [2020-09-25 00:56:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-25 00:56:51,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:51,936 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] [2020-09-25 00:56:51,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:56:51,936 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash -358793535, now seen corresponding path program 1 times [2020-09-25 00:56:51,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:51,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476252715] [2020-09-25 00:56:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:51,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:52,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:52,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:52,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:54,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:54,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-09-25 00:56:54,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:56:54,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2194 [2020-09-25 00:56:54,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:54,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:56:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 00:56:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 00:56:54,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:54,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:54,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:54,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:54,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:54,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:54,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:54,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:54,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:54,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:54,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476252715] [2020-09-25 00:56:54,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:54,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:56:54,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175519040] [2020-09-25 00:56:54,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:56:54,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:56:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:56:54,234 INFO L87 Difference]: Start difference. First operand 556 states and 685 transitions. Second operand 3 states. [2020-09-25 00:56:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:54,466 INFO L93 Difference]: Finished difference Result 1034 states and 1329 transitions. [2020-09-25 00:56:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:56:54,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-09-25 00:56:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:54,471 INFO L225 Difference]: With dead ends: 1034 [2020-09-25 00:56:54,471 INFO L226 Difference]: Without dead ends: 617 [2020-09-25 00:56:54,472 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 [2020-09-25 00:56:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-09-25 00:56:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 590. [2020-09-25 00:56:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-09-25 00:56:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 736 transitions. [2020-09-25 00:56:54,488 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 736 transitions. Word has length 168 [2020-09-25 00:56:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:54,489 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 736 transitions. [2020-09-25 00:56:54,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:56:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 736 transitions. [2020-09-25 00:56:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 00:56:54,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:54,492 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:56:54,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:56:54,493 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1172377495, now seen corresponding path program 1 times [2020-09-25 00:56:54,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:54,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550294881] [2020-09-25 00:56:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:54,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:54,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:55,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:55,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-09-25 00:56:55,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:55,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-09-25 00:56:55,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:55,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:56:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-09-25 00:56:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 00:56:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:55,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:55,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:55,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:55,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:55,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:55,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:56:55,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:55,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:55,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:55,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:55,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550294881] [2020-09-25 00:56:55,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:55,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:56:55,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121328327] [2020-09-25 00:56:55,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:56:55,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:56:55,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:56:55,073 INFO L87 Difference]: Start difference. First operand 590 states and 736 transitions. Second operand 3 states. [2020-09-25 00:56:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:55,233 INFO L93 Difference]: Finished difference Result 1471 states and 1901 transitions. [2020-09-25 00:56:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:56:55,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2020-09-25 00:56:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:55,239 INFO L225 Difference]: With dead ends: 1471 [2020-09-25 00:56:55,239 INFO L226 Difference]: Without dead ends: 1020 [2020-09-25 00:56:55,241 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 [2020-09-25 00:56:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-09-25 00:56:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1018. [2020-09-25 00:56:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2020-09-25 00:56:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1285 transitions. [2020-09-25 00:56:55,269 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1285 transitions. Word has length 176 [2020-09-25 00:56:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:55,270 INFO L479 AbstractCegarLoop]: Abstraction has 1018 states and 1285 transitions. [2020-09-25 00:56:55,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:56:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1285 transitions. [2020-09-25 00:56:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-25 00:56:55,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:55,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:56:55,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:56:55,274 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:55,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1059203184, now seen corresponding path program 1 times [2020-09-25 00:56:55,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:55,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427402205] [2020-09-25 00:56:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:55,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 00:56:55,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:55,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-09-25 00:56:55,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:55,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:56:55,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:56:55,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 00:56:55,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:56,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:56,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:56,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:56,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:56,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:56,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:56,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427402205] [2020-09-25 00:56:56,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:56,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 00:56:56,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552752795] [2020-09-25 00:56:56,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:56:56,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:56:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:56:56,174 INFO L87 Difference]: Start difference. First operand 1018 states and 1285 transitions. Second operand 6 states. [2020-09-25 00:56:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:56,489 INFO L93 Difference]: Finished difference Result 1981 states and 2548 transitions. [2020-09-25 00:56:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:56:56,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2020-09-25 00:56:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:56,501 INFO L225 Difference]: With dead ends: 1981 [2020-09-25 00:56:56,502 INFO L226 Difference]: Without dead ends: 1102 [2020-09-25 00:56:56,506 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 [2020-09-25 00:56:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2020-09-25 00:56:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1070. [2020-09-25 00:56:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-25 00:56:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1349 transitions. [2020-09-25 00:56:56,552 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1349 transitions. Word has length 179 [2020-09-25 00:56:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:56,553 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1349 transitions. [2020-09-25 00:56:56,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:56:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1349 transitions. [2020-09-25 00:56:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-09-25 00:56:56,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:56,562 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] [2020-09-25 00:56:56,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:56:56,562 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1625465716, now seen corresponding path program 1 times [2020-09-25 00:56:56,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:56,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112110112] [2020-09-25 00:56:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:56,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:56,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:56,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:56,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-09-25 00:56:56,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:56,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-25 00:56:56,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:56,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:56:56,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-25 00:56:56,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 00:56:56,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:57,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:57,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:57,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:57,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:57,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:57,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:56:57,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:57,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 00:56:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:57,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112110112] [2020-09-25 00:56:57,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:57,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:56:57,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220585712] [2020-09-25 00:56:57,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:56:57,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:56:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:56:57,092 INFO L87 Difference]: Start difference. First operand 1070 states and 1349 transitions. Second operand 3 states. [2020-09-25 00:56:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:57,278 INFO L93 Difference]: Finished difference Result 2078 states and 2659 transitions. [2020-09-25 00:56:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:56:57,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2020-09-25 00:56:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:57,284 INFO L225 Difference]: With dead ends: 2078 [2020-09-25 00:56:57,285 INFO L226 Difference]: Without dead ends: 1147 [2020-09-25 00:56:57,287 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 [2020-09-25 00:56:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-09-25 00:56:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1126. [2020-09-25 00:56:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2020-09-25 00:56:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1415 transitions. [2020-09-25 00:56:57,325 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1415 transitions. Word has length 202 [2020-09-25 00:56:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:57,326 INFO L479 AbstractCegarLoop]: Abstraction has 1126 states and 1415 transitions. [2020-09-25 00:56:57,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:56:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1415 transitions. [2020-09-25 00:56:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-25 00:56:57,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:57,331 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] [2020-09-25 00:56:57,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:56:57,331 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1597515948, now seen corresponding path program 1 times [2020-09-25 00:56:57,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:57,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670544783] [2020-09-25 00:56:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:57,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:57,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:57,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:57,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:57,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-09-25 00:56:57,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:57,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-09-25 00:56:57,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:56:57,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-25 00:56:57,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 00:56:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:56:58,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:58,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:58,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:58,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:58,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:58,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:56:58,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:58,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:56:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:56:58,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670544783] [2020-09-25 00:56:58,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:58,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:56:58,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17999754] [2020-09-25 00:56:58,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:56:58,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:56:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:56:58,078 INFO L87 Difference]: Start difference. First operand 1126 states and 1415 transitions. Second operand 4 states. [2020-09-25 00:56:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:58,506 INFO L93 Difference]: Finished difference Result 3168 states and 4057 transitions. [2020-09-25 00:56:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:56:58,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2020-09-25 00:56:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:58,518 INFO L225 Difference]: With dead ends: 3168 [2020-09-25 00:56:58,519 INFO L226 Difference]: Without dead ends: 2181 [2020-09-25 00:56:58,525 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 [2020-09-25 00:56:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-09-25 00:56:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1132. [2020-09-25 00:56:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2020-09-25 00:56:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1421 transitions. [2020-09-25 00:56:58,612 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1421 transitions. Word has length 210 [2020-09-25 00:56:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:58,613 INFO L479 AbstractCegarLoop]: Abstraction has 1132 states and 1421 transitions. [2020-09-25 00:56:58,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:56:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1421 transitions. [2020-09-25 00:56:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-25 00:56:58,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:58,622 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] [2020-09-25 00:56:58,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:56:58,622 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:58,623 INFO L82 PathProgramCache]: Analyzing trace with hash 170459603, now seen corresponding path program 1 times [2020-09-25 00:56:58,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:58,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22335359] [2020-09-25 00:56:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:58,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:58,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:59,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:59,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-25 00:56:59,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:56:59,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-09-25 00:56:59,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:56:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-09-25 00:56:59,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:56:59,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:56:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:59,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:56:59,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:56:59,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:56:59,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:56:59,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:56:59,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:56:59,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:56:59,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:56:59,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:56:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 00:56:59,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22335359] [2020-09-25 00:56:59,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:56:59,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:56:59,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645717695] [2020-09-25 00:56:59,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:56:59,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:56:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:56:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:56:59,210 INFO L87 Difference]: Start difference. First operand 1132 states and 1421 transitions. Second operand 3 states. [2020-09-25 00:56:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:56:59,463 INFO L93 Difference]: Finished difference Result 2233 states and 2873 transitions. [2020-09-25 00:56:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:56:59,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-09-25 00:56:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:56:59,470 INFO L225 Difference]: With dead ends: 2233 [2020-09-25 00:56:59,471 INFO L226 Difference]: Without dead ends: 1240 [2020-09-25 00:56:59,473 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 [2020-09-25 00:56:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-25 00:56:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1228. [2020-09-25 00:56:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2020-09-25 00:56:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1535 transitions. [2020-09-25 00:56:59,520 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1535 transitions. Word has length 229 [2020-09-25 00:56:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:56:59,520 INFO L479 AbstractCegarLoop]: Abstraction has 1228 states and 1535 transitions. [2020-09-25 00:56:59,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:56:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1535 transitions. [2020-09-25 00:56:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-25 00:56:59,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:56:59,526 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] [2020-09-25 00:56:59,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:56:59,526 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:56:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:56:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash 402086451, now seen corresponding path program 1 times [2020-09-25 00:56:59,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:56:59,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986198408] [2020-09-25 00:56:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:56:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:56:59,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:59,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:56:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:00,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:00,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-25 00:57:00,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:57:00,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-09-25 00:57:00,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:57:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-09-25 00:57:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:57:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:00,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:00,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:00,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:00,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:00,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:00,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:00,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 00:57:00,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986198408] [2020-09-25 00:57:00,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:00,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:57:00,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560990681] [2020-09-25 00:57:00,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:57:00,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:57:00,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:57:00,333 INFO L87 Difference]: Start difference. First operand 1228 states and 1535 transitions. Second operand 3 states. [2020-09-25 00:57:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:00,623 INFO L93 Difference]: Finished difference Result 2549 states and 3277 transitions. [2020-09-25 00:57:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:57:00,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-09-25 00:57:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:00,631 INFO L225 Difference]: With dead ends: 2549 [2020-09-25 00:57:00,631 INFO L226 Difference]: Without dead ends: 1420 [2020-09-25 00:57:00,634 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 [2020-09-25 00:57:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2020-09-25 00:57:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1346. [2020-09-25 00:57:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1346 states. [2020-09-25 00:57:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1695 transitions. [2020-09-25 00:57:00,677 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1695 transitions. Word has length 229 [2020-09-25 00:57:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:00,677 INFO L479 AbstractCegarLoop]: Abstraction has 1346 states and 1695 transitions. [2020-09-25 00:57:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:57:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1695 transitions. [2020-09-25 00:57:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-09-25 00:57:00,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:00,685 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] [2020-09-25 00:57:00,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:57:00,686 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -902469965, now seen corresponding path program 1 times [2020-09-25 00:57:00,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:00,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986242511] [2020-09-25 00:57:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:00,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:00,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:01,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:01,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-09-25 00:57:01,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:57:01,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-09-25 00:57:01,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-09-25 00:57:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 00:57:01,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:01,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:01,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:01,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:01,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:01,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:01,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:01,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:01,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:01,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 00:57:01,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986242511] [2020-09-25 00:57:01,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:01,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:01,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385150374] [2020-09-25 00:57:01,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:01,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:01,416 INFO L87 Difference]: Start difference. First operand 1346 states and 1695 transitions. Second operand 4 states. [2020-09-25 00:57:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:01,963 INFO L93 Difference]: Finished difference Result 4065 states and 5276 transitions. [2020-09-25 00:57:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:01,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-09-25 00:57:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:01,977 INFO L225 Difference]: With dead ends: 4065 [2020-09-25 00:57:01,978 INFO L226 Difference]: Without dead ends: 2858 [2020-09-25 00:57:01,983 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 [2020-09-25 00:57:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2020-09-25 00:57:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 1494. [2020-09-25 00:57:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-09-25 00:57:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1943 transitions. [2020-09-25 00:57:02,042 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1943 transitions. Word has length 237 [2020-09-25 00:57:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:02,042 INFO L479 AbstractCegarLoop]: Abstraction has 1494 states and 1943 transitions. [2020-09-25 00:57:02,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1943 transitions. [2020-09-25 00:57:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-09-25 00:57:02,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:02,048 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] [2020-09-25 00:57:02,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:57:02,048 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1492478522, now seen corresponding path program 1 times [2020-09-25 00:57:02,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:02,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632352197] [2020-09-25 00:57:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:02,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:02,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:02,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:02,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-25 00:57:02,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:57:02,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-09-25 00:57:02,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:02,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:02,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-09-25 00:57:02,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 00:57:02,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:02,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:02,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:02,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:02,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:02,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:02,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 00:57:02,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632352197] [2020-09-25 00:57:02,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:02,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:02,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004118433] [2020-09-25 00:57:02,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:02,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:02,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:02,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:02,839 INFO L87 Difference]: Start difference. First operand 1494 states and 1943 transitions. Second operand 4 states. [2020-09-25 00:57:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:03,346 INFO L93 Difference]: Finished difference Result 4460 states and 5861 transitions. [2020-09-25 00:57:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:03,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-09-25 00:57:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:03,360 INFO L225 Difference]: With dead ends: 4460 [2020-09-25 00:57:03,361 INFO L226 Difference]: Without dead ends: 3105 [2020-09-25 00:57:03,369 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 [2020-09-25 00:57:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2020-09-25 00:57:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1596. [2020-09-25 00:57:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2020-09-25 00:57:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2057 transitions. [2020-09-25 00:57:03,438 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2057 transitions. Word has length 238 [2020-09-25 00:57:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:03,439 INFO L479 AbstractCegarLoop]: Abstraction has 1596 states and 2057 transitions. [2020-09-25 00:57:03,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2057 transitions. [2020-09-25 00:57:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-09-25 00:57:03,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:03,445 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] [2020-09-25 00:57:03,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:57:03,446 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash 459909478, now seen corresponding path program 1 times [2020-09-25 00:57:03,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:03,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943743293] [2020-09-25 00:57:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:03,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:03,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:04,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:04,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:04,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-25 00:57:04,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:57:04,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-09-25 00:57:04,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-09-25 00:57:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 00:57:04,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:04,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:04,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:57:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 00:57:04,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943743293] [2020-09-25 00:57:04,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:04,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:04,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58896742] [2020-09-25 00:57:04,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:04,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:04,436 INFO L87 Difference]: Start difference. First operand 1596 states and 2057 transitions. Second operand 4 states. [2020-09-25 00:57:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:04,849 INFO L93 Difference]: Finished difference Result 4664 states and 6073 transitions. [2020-09-25 00:57:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:04,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-09-25 00:57:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:04,865 INFO L225 Difference]: With dead ends: 4664 [2020-09-25 00:57:04,865 INFO L226 Difference]: Without dead ends: 3207 [2020-09-25 00:57:04,870 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 [2020-09-25 00:57:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2020-09-25 00:57:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 1662. [2020-09-25 00:57:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2020-09-25 00:57:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2135 transitions. [2020-09-25 00:57:04,935 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2135 transitions. Word has length 238 [2020-09-25 00:57:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:04,935 INFO L479 AbstractCegarLoop]: Abstraction has 1662 states and 2135 transitions. [2020-09-25 00:57:04,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2135 transitions. [2020-09-25 00:57:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-09-25 00:57:04,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:04,942 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-09-25 00:57:04,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 00:57:04,942 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1907114782, now seen corresponding path program 1 times [2020-09-25 00:57:04,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:04,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802990115] [2020-09-25 00:57:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:05,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:05,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:05,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-09-25 00:57:05,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:57:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-09-25 00:57:05,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:57:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-09-25 00:57:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 00:57:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:05,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:05,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:05,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:05,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:05,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:05,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:05,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-25 00:57:05,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802990115] [2020-09-25 00:57:05,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:05,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:57:05,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390916173] [2020-09-25 00:57:05,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:57:05,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:57:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:57:05,673 INFO L87 Difference]: Start difference. First operand 1662 states and 2135 transitions. Second operand 3 states. [2020-09-25 00:57:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:05,882 INFO L93 Difference]: Finished difference Result 3328 states and 4321 transitions. [2020-09-25 00:57:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:57:05,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2020-09-25 00:57:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:05,891 INFO L225 Difference]: With dead ends: 3328 [2020-09-25 00:57:05,892 INFO L226 Difference]: Without dead ends: 1805 [2020-09-25 00:57:05,895 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 [2020-09-25 00:57:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2020-09-25 00:57:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1728. [2020-09-25 00:57:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2020-09-25 00:57:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2213 transitions. [2020-09-25 00:57:05,950 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2213 transitions. Word has length 260 [2020-09-25 00:57:05,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:05,950 INFO L479 AbstractCegarLoop]: Abstraction has 1728 states and 2213 transitions. [2020-09-25 00:57:05,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:57:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2213 transitions. [2020-09-25 00:57:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-09-25 00:57:05,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:05,955 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] [2020-09-25 00:57:05,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 00:57:05,956 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:05,956 INFO L82 PathProgramCache]: Analyzing trace with hash -677382142, now seen corresponding path program 1 times [2020-09-25 00:57:05,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:05,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437153541] [2020-09-25 00:57:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:07,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:07,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-09-25 00:57:07,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:57:07,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1512 [2020-09-25 00:57:07,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-09-25 00:57:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 00:57:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:07,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:07,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:07,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:07,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:07,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:07,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:57:07,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:07,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:07,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:07,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 00:57:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-25 00:57:07,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437153541] [2020-09-25 00:57:07,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:07,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:07,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462677752] [2020-09-25 00:57:07,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:07,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:07,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:07,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:07,674 INFO L87 Difference]: Start difference. First operand 1728 states and 2213 transitions. Second operand 4 states. [2020-09-25 00:57:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:08,200 INFO L93 Difference]: Finished difference Result 5079 states and 6578 transitions. [2020-09-25 00:57:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:08,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 268 [2020-09-25 00:57:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:08,218 INFO L225 Difference]: With dead ends: 5079 [2020-09-25 00:57:08,218 INFO L226 Difference]: Without dead ends: 3466 [2020-09-25 00:57:08,223 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 [2020-09-25 00:57:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2020-09-25 00:57:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 1772. [2020-09-25 00:57:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1772 states. [2020-09-25 00:57:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2283 transitions. [2020-09-25 00:57:08,305 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2283 transitions. Word has length 268 [2020-09-25 00:57:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:08,306 INFO L479 AbstractCegarLoop]: Abstraction has 1772 states and 2283 transitions. [2020-09-25 00:57:08,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2283 transitions. [2020-09-25 00:57:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-09-25 00:57:08,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:08,312 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, 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] [2020-09-25 00:57:08,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 00:57:08,312 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1332000651, now seen corresponding path program 1 times [2020-09-25 00:57:08,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:08,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363246317] [2020-09-25 00:57:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:08,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:09,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:09,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-09-25 00:57:09,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:57:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-09-25 00:57:09,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:09,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:09,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-09-25 00:57:09,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 00:57:09,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:09,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:09,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:09,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:09,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:09,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:09,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:09,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-25 00:57:09,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363246317] [2020-09-25 00:57:09,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:09,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:09,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101095074] [2020-09-25 00:57:09,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:09,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:09,502 INFO L87 Difference]: Start difference. First operand 1772 states and 2283 transitions. Second operand 4 states. [2020-09-25 00:57:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:09,968 INFO L93 Difference]: Finished difference Result 5056 states and 6589 transitions. [2020-09-25 00:57:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:09,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 287 [2020-09-25 00:57:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:09,986 INFO L225 Difference]: With dead ends: 5056 [2020-09-25 00:57:09,986 INFO L226 Difference]: Without dead ends: 3423 [2020-09-25 00:57:09,991 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 [2020-09-25 00:57:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2020-09-25 00:57:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 1784. [2020-09-25 00:57:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1784 states. [2020-09-25 00:57:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2289 transitions. [2020-09-25 00:57:10,058 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2289 transitions. Word has length 287 [2020-09-25 00:57:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:10,059 INFO L479 AbstractCegarLoop]: Abstraction has 1784 states and 2289 transitions. [2020-09-25 00:57:10,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2289 transitions. [2020-09-25 00:57:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-09-25 00:57:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:10,064 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2020-09-25 00:57:10,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 00:57:10,065 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 956025115, now seen corresponding path program 1 times [2020-09-25 00:57:10,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:10,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199613334] [2020-09-25 00:57:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:10,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:10,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:10,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:10,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:11,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:11,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:11,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-09-25 00:57:11,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:57:11,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1589 [2020-09-25 00:57:11,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:11,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:57:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-09-25 00:57:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 00:57:11,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:11,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:11,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:11,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:11,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:57:11,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-25 00:57:11,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199613334] [2020-09-25 00:57:11,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:11,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:57:11,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113024066] [2020-09-25 00:57:11,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:57:11,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:57:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:57:11,868 INFO L87 Difference]: Start difference. First operand 1784 states and 2289 transitions. Second operand 3 states. [2020-09-25 00:57:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:12,238 INFO L93 Difference]: Finished difference Result 3681 states and 4761 transitions. [2020-09-25 00:57:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:57:12,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 296 [2020-09-25 00:57:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:12,245 INFO L225 Difference]: With dead ends: 3681 [2020-09-25 00:57:12,246 INFO L226 Difference]: Without dead ends: 2004 [2020-09-25 00:57:12,262 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 [2020-09-25 00:57:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2020-09-25 00:57:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1854. [2020-09-25 00:57:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1854 states. [2020-09-25 00:57:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2389 transitions. [2020-09-25 00:57:12,354 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2389 transitions. Word has length 296 [2020-09-25 00:57:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:12,355 INFO L479 AbstractCegarLoop]: Abstraction has 1854 states and 2389 transitions. [2020-09-25 00:57:12,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:57:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2389 transitions. [2020-09-25 00:57:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-09-25 00:57:12,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:12,369 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] [2020-09-25 00:57:12,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 00:57:12,370 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1359941763, now seen corresponding path program 1 times [2020-09-25 00:57:12,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:12,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181017671] [2020-09-25 00:57:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:12,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:13,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:13,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-09-25 00:57:13,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:57:13,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-09-25 00:57:13,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:57:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 248 [2020-09-25 00:57:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:57:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:13,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:13,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:13,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:13,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:13,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-25 00:57:13,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181017671] [2020-09-25 00:57:13,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:13,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:13,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856097712] [2020-09-25 00:57:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:13,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:13,692 INFO L87 Difference]: Start difference. First operand 1854 states and 2389 transitions. Second operand 4 states. [2020-09-25 00:57:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:13,993 INFO L93 Difference]: Finished difference Result 3723 states and 4812 transitions. [2020-09-25 00:57:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:13,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 297 [2020-09-25 00:57:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:14,000 INFO L225 Difference]: With dead ends: 3723 [2020-09-25 00:57:14,000 INFO L226 Difference]: Without dead ends: 2008 [2020-09-25 00:57:14,003 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 [2020-09-25 00:57:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2020-09-25 00:57:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1824. [2020-09-25 00:57:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1824 states. [2020-09-25 00:57:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2333 transitions. [2020-09-25 00:57:14,075 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2333 transitions. Word has length 297 [2020-09-25 00:57:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:14,076 INFO L479 AbstractCegarLoop]: Abstraction has 1824 states and 2333 transitions. [2020-09-25 00:57:14,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2333 transitions. [2020-09-25 00:57:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-09-25 00:57:14,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:14,083 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:14,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 00:57:14,084 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1472523428, now seen corresponding path program 1 times [2020-09-25 00:57:14,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:14,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847767206] [2020-09-25 00:57:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:14,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:14,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:14,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:15,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:16,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-09-25 00:57:16,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 00:57:16,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:16,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:16,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:16,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:16,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:16,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:16,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:16,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:16,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:16,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:16,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-25 00:57:16,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847767206] [2020-09-25 00:57:16,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:16,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:16,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953559604] [2020-09-25 00:57:16,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:16,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:16,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:16,188 INFO L87 Difference]: Start difference. First operand 1824 states and 2333 transitions. Second operand 4 states. [2020-09-25 00:57:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:16,663 INFO L93 Difference]: Finished difference Result 5325 states and 6898 transitions. [2020-09-25 00:57:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:16,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 298 [2020-09-25 00:57:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:16,672 INFO L225 Difference]: With dead ends: 5325 [2020-09-25 00:57:16,673 INFO L226 Difference]: Without dead ends: 3608 [2020-09-25 00:57:16,677 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 [2020-09-25 00:57:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2020-09-25 00:57:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 1908. [2020-09-25 00:57:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2020-09-25 00:57:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2451 transitions. [2020-09-25 00:57:16,745 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2451 transitions. Word has length 298 [2020-09-25 00:57:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:16,745 INFO L479 AbstractCegarLoop]: Abstraction has 1908 states and 2451 transitions. [2020-09-25 00:57:16,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2451 transitions. [2020-09-25 00:57:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-09-25 00:57:16,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:16,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:16,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 00:57:16,752 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:16,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1833387205, now seen corresponding path program 1 times [2020-09-25 00:57:16,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:16,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43273069] [2020-09-25 00:57:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:16,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:16,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:17,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:17,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:20,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3920 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 00:57:20,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:20,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:20,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:20,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:20,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:20,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:57:20,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:20,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:20,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:20,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:20,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-25 00:57:20,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43273069] [2020-09-25 00:57:20,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:20,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:20,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775910788] [2020-09-25 00:57:20,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:20,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:20,797 INFO L87 Difference]: Start difference. First operand 1908 states and 2451 transitions. Second operand 4 states. [2020-09-25 00:57:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:21,330 INFO L93 Difference]: Finished difference Result 5383 states and 6954 transitions. [2020-09-25 00:57:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:57:21,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 304 [2020-09-25 00:57:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:21,340 INFO L225 Difference]: With dead ends: 5383 [2020-09-25 00:57:21,340 INFO L226 Difference]: Without dead ends: 3614 [2020-09-25 00:57:21,344 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 [2020-09-25 00:57:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2020-09-25 00:57:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 1924. [2020-09-25 00:57:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1924 states. [2020-09-25 00:57:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2481 transitions. [2020-09-25 00:57:21,412 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2481 transitions. Word has length 304 [2020-09-25 00:57:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:21,416 INFO L479 AbstractCegarLoop]: Abstraction has 1924 states and 2481 transitions. [2020-09-25 00:57:21,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2481 transitions. [2020-09-25 00:57:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-09-25 00:57:21,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:21,422 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] [2020-09-25 00:57:21,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 00:57:21,423 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1929667931, now seen corresponding path program 1 times [2020-09-25 00:57:21,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:21,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247541874] [2020-09-25 00:57:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:21,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:22,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:22,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:26,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:26,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-09-25 00:57:26,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:57:26,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 00:57:26,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:26,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:57:26,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 256 [2020-09-25 00:57:26,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:57:26,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:26,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:26,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:26,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:57:26,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:57:26,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:26,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-25 00:57:26,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247541874] [2020-09-25 00:57:26,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:57:26,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 00:57:26,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838234048] [2020-09-25 00:57:26,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:57:26,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:57:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:57:26,621 INFO L87 Difference]: Start difference. First operand 1924 states and 2481 transitions. Second operand 5 states. [2020-09-25 00:57:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:27,321 INFO L93 Difference]: Finished difference Result 7303 states and 9422 transitions. [2020-09-25 00:57:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:57:27,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-09-25 00:57:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:27,338 INFO L225 Difference]: With dead ends: 7303 [2020-09-25 00:57:27,338 INFO L226 Difference]: Without dead ends: 5286 [2020-09-25 00:57:27,343 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 [2020-09-25 00:57:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2020-09-25 00:57:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 2147. [2020-09-25 00:57:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-09-25 00:57:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2793 transitions. [2020-09-25 00:57:27,430 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2793 transitions. Word has length 305 [2020-09-25 00:57:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:27,431 INFO L479 AbstractCegarLoop]: Abstraction has 2147 states and 2793 transitions. [2020-09-25 00:57:27,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:57:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2793 transitions. [2020-09-25 00:57:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-09-25 00:57:27,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:27,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:27,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 00:57:27,438 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:27,438 INFO L82 PathProgramCache]: Analyzing trace with hash -649834575, now seen corresponding path program 1 times [2020-09-25 00:57:27,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:27,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958684611] [2020-09-25 00:57:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking...