/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:59:55,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:59:55,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:59:55,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:59:55,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:59:55,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:59:55,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:59:55,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:59:55,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:59:55,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:59:55,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:59:55,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:59:55,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:59:55,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:59:55,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:59:55,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:59:55,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:59:55,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:59:55,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:59:55,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:59:55,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:59:55,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:59:55,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:59:55,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:59:55,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:59:55,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:59:55,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:59:55,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:59:55,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:59:55,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:59:55,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:59:55,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:59:55,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:59:55,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:59:55,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:59:55,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:59:55,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:59:55,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:59:55,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:59:55,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:59:55,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:59:55,682 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 [2020-10-12 20:59:55,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:59:55,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:59:55,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:59:55,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:59:55,707 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:59:55,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:59:55,708 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:59:55,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:59:55,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:59:55,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:59:55,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:59:55,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:59:55,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:59:55,709 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:59:55,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:59:55,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:59:55,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:59:55,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:59:55,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:59:55,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:59:55,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:59:55,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:59:55,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:59:55,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:59:55,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:59:55,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:59:55,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:59:55,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:59:55,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:59:55,712 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:59:56,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:59:56,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:59:56,022 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:59:56,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:59:56,024 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:59:56,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-10-12 20:59:56,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97fd28e31/2058b007c1bf488bb016c8756ff78948/FLAGaf5a26e6d [2020-10-12 20:59:56,623 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:59:56,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-10-12 20:59:56,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97fd28e31/2058b007c1bf488bb016c8756ff78948/FLAGaf5a26e6d [2020-10-12 20:59:56,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97fd28e31/2058b007c1bf488bb016c8756ff78948 [2020-10-12 20:59:56,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:59:56,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:59:56,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:59:56,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:59:56,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:59:56,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:59:56" (1/1) ... [2020-10-12 20:59:56,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ea35b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:56, skipping insertion in model container [2020-10-12 20:59:56,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:59:56" (1/1) ... [2020-10-12 20:59:56,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:59:57,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:59:57,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:59:57,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:59:57,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:59:57,502 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:59:57,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57 WrapperNode [2020-10-12 20:59:57,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:59:57,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:59:57,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:59:57,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:59:57,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (1/1) ... [2020-10-12 20:59:57,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:59:57,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:59:57,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:59:57,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:59:57,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (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 [2020-10-12 20:59:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:59:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:59:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-10-12 20:59:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:59:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:59:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:59:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 20:59:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-12 20:59:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-10-12 20:59:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:59:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:59:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:59:57,846 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-12 20:59:58,399 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-10-12 20:59:58,399 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-10-12 20:59:58,412 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:59:58,412 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 20:59:58,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:59:58 BoogieIcfgContainer [2020-10-12 20:59:58,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:59:58,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:59:58,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:59:58,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:59:58,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:59:56" (1/3) ... [2020-10-12 20:59:58,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701f8aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:59:58, skipping insertion in model container [2020-10-12 20:59:58,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:59:57" (2/3) ... [2020-10-12 20:59:58,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701f8aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:59:58, skipping insertion in model container [2020-10-12 20:59:58,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:59:58" (3/3) ... [2020-10-12 20:59:58,430 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-10-12 20:59:58,442 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:59:58,451 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:59:58,467 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:59:58,495 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:59:58,496 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:59:58,496 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:59:58,496 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:59:58,497 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:59:58,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:59:58,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:59:58,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:59:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-10-12 20:59:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 20:59:58,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:59:58,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:59:58,534 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:59:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:59:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-10-12 20:59:58,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:59:58,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792952818] [2020-10-12 20:59:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:59:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:59:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:59:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:59:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:59:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:59:59,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:59:59,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 20:59:59,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:59:59,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-12 20:59:59,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:59:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:59:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 20:59:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 20:59:59,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:59:59,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:59:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:59:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:59:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:59:59,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 20:59:59,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:59:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 20:59:59,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:59:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:59:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:59:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:59:59,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:59:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:59:59,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792952818] [2020-10-12 20:59:59,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:59:59,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:59:59,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011658252] [2020-10-12 20:59:59,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:59:59,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:59:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:59:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:59:59,629 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 6 states. [2020-10-12 21:00:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:00,004 INFO L93 Difference]: Finished difference Result 366 states and 621 transitions. [2020-10-12 21:00:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 21:00:00,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-12 21:00:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:00,022 INFO L225 Difference]: With dead ends: 366 [2020-10-12 21:00:00,023 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 21:00:00,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 21:00:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 21:00:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2020-10-12 21:00:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 21:00:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2020-10-12 21:00:00,096 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 28 [2020-10-12 21:00:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:00,097 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2020-10-12 21:00:00,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 21:00:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2020-10-12 21:00:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 21:00:00,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:00,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:00,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 21:00:00,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1011027680, now seen corresponding path program 1 times [2020-10-12 21:00:00,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:00,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039128930] [2020-10-12 21:00:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:00,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 21:00:00,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 21:00:00,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-12 21:00:00,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:00,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:00:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 21:00:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 21:00:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:00,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:00,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:00,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:00,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:00,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:00,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:00,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:00,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:00,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 21:00:00,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039128930] [2020-10-12 21:00:00,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:00,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 21:00:00,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370519316] [2020-10-12 21:00:00,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 21:00:00,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 21:00:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 21:00:00,520 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand 4 states. [2020-10-12 21:00:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:00,741 INFO L93 Difference]: Finished difference Result 242 states and 364 transitions. [2020-10-12 21:00:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 21:00:00,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 21:00:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:00,745 INFO L225 Difference]: With dead ends: 242 [2020-10-12 21:00:00,745 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 21:00:00,746 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 [2020-10-12 21:00:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 21:00:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2020-10-12 21:00:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 21:00:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 309 transitions. [2020-10-12 21:00:00,783 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 309 transitions. Word has length 44 [2020-10-12 21:00:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:00,784 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 309 transitions. [2020-10-12 21:00:00,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 21:00:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 309 transitions. [2020-10-12 21:00:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 21:00:00,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:00,787 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 21:00:00,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 21:00:00,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1649194187, now seen corresponding path program 1 times [2020-10-12 21:00:00,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:00,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652086215] [2020-10-12 21:00:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:00,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:01,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 21:00:01,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 21:00:01,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-12 21:00:01,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:00:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 21:00:01,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 21:00:01,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:01,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:01,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:01,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:01,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 21:00:01,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652086215] [2020-10-12 21:00:01,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:01,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 21:00:01,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709222652] [2020-10-12 21:00:01,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 21:00:01,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 21:00:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 21:00:01,556 INFO L87 Difference]: Start difference. First operand 202 states and 309 transitions. Second operand 4 states. [2020-10-12 21:00:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:01,753 INFO L93 Difference]: Finished difference Result 238 states and 360 transitions. [2020-10-12 21:00:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 21:00:01,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-12 21:00:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:01,756 INFO L225 Difference]: With dead ends: 238 [2020-10-12 21:00:01,756 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 21:00:01,757 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 [2020-10-12 21:00:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 21:00:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 186. [2020-10-12 21:00:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 21:00:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 285 transitions. [2020-10-12 21:00:01,770 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 285 transitions. Word has length 45 [2020-10-12 21:00:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:01,771 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 285 transitions. [2020-10-12 21:00:01,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 21:00:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 285 transitions. [2020-10-12 21:00:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 21:00:01,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:01,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:01,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 21:00:01,774 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash -357227306, now seen corresponding path program 1 times [2020-10-12 21:00:01,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:01,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332234903] [2020-10-12 21:00:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:01,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:02,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 21:00:02,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 21:00:02,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-12 21:00:02,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:00:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 21:00:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 21:00:02,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:02,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:02,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:02,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:02,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:02,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:02,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 21:00:02,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332234903] [2020-10-12 21:00:02,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:02,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 21:00:02,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474080291] [2020-10-12 21:00:02,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 21:00:02,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 21:00:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 21:00:02,111 INFO L87 Difference]: Start difference. First operand 186 states and 285 transitions. Second operand 4 states. [2020-10-12 21:00:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:02,312 INFO L93 Difference]: Finished difference Result 254 states and 383 transitions. [2020-10-12 21:00:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 21:00:02,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-12 21:00:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:02,314 INFO L225 Difference]: With dead ends: 254 [2020-10-12 21:00:02,314 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 21:00:02,315 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 [2020-10-12 21:00:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 21:00:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 184. [2020-10-12 21:00:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 21:00:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 283 transitions. [2020-10-12 21:00:02,326 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 283 transitions. Word has length 45 [2020-10-12 21:00:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:02,327 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 283 transitions. [2020-10-12 21:00:02,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 21:00:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 283 transitions. [2020-10-12 21:00:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 21:00:02,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:02,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:02,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 21:00:02,329 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1426934551, now seen corresponding path program 1 times [2020-10-12 21:00:02,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:02,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26954715] [2020-10-12 21:00:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:02,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 21:00:02,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 21:00:02,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-12 21:00:02,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:02,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:00:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 21:00:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 21:00:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:02,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:02,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:02,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:02,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:02,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:00:02,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:02,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:02,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:02,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 21:00:02,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26954715] [2020-10-12 21:00:02,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:02,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 21:00:02,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483058733] [2020-10-12 21:00:02,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 21:00:02,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 21:00:02,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 21:00:02,653 INFO L87 Difference]: Start difference. First operand 184 states and 283 transitions. Second operand 4 states. [2020-10-12 21:00:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:02,900 INFO L93 Difference]: Finished difference Result 252 states and 381 transitions. [2020-10-12 21:00:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 21:00:02,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-12 21:00:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:02,902 INFO L225 Difference]: With dead ends: 252 [2020-10-12 21:00:02,902 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 21:00:02,903 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 [2020-10-12 21:00:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 21:00:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-10-12 21:00:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 21:00:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 283 transitions. [2020-10-12 21:00:02,916 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 283 transitions. Word has length 45 [2020-10-12 21:00:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:02,917 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 283 transitions. [2020-10-12 21:00:02,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 21:00:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 283 transitions. [2020-10-12 21:00:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 21:00:02,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:02,924 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] [2020-10-12 21:00:02,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 21:00:02,924 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:02,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1093691386, now seen corresponding path program 1 times [2020-10-12 21:00:02,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:02,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180074051] [2020-10-12 21:00:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:02,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 21:00:03,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 21:00:03,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-12 21:00:03,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-12 21:00:03,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:00:03,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 21:00:03,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:03,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:03,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:03,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:03,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 21:00:03,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180074051] [2020-10-12 21:00:03,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:03,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:03,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950194132] [2020-10-12 21:00:03,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:03,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:03,180 INFO L87 Difference]: Start difference. First operand 184 states and 283 transitions. Second operand 3 states. [2020-10-12 21:00:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:03,376 INFO L93 Difference]: Finished difference Result 421 states and 659 transitions. [2020-10-12 21:00:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:03,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-10-12 21:00:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:03,379 INFO L225 Difference]: With dead ends: 421 [2020-10-12 21:00:03,379 INFO L226 Difference]: Without dead ends: 238 [2020-10-12 21:00:03,383 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 [2020-10-12 21:00:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-12 21:00:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2020-10-12 21:00:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 21:00:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 339 transitions. [2020-10-12 21:00:03,396 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 339 transitions. Word has length 53 [2020-10-12 21:00:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:03,396 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 339 transitions. [2020-10-12 21:00:03,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 339 transitions. [2020-10-12 21:00:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 21:00:03,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:03,398 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] [2020-10-12 21:00:03,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 21:00:03,398 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash -413633016, now seen corresponding path program 1 times [2020-10-12 21:00:03,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:03,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178416428] [2020-10-12 21:00:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 21:00:03,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:00:03,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-12 21:00:03,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:03,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 21:00:03,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 21:00:03,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:03,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:03,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:03,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:03,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:00:03,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178416428] [2020-10-12 21:00:03,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:03,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:03,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236971414] [2020-10-12 21:00:03,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:03,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:03,587 INFO L87 Difference]: Start difference. First operand 232 states and 339 transitions. Second operand 3 states. [2020-10-12 21:00:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:03,598 INFO L93 Difference]: Finished difference Result 451 states and 661 transitions. [2020-10-12 21:00:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:03,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-10-12 21:00:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:03,602 INFO L225 Difference]: With dead ends: 451 [2020-10-12 21:00:03,602 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 21:00:03,606 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 [2020-10-12 21:00:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 21:00:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-12 21:00:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 21:00:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-10-12 21:00:03,618 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 53 [2020-10-12 21:00:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:03,618 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-10-12 21:00:03,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-10-12 21:00:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 21:00:03,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:03,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:03,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 21:00:03,621 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1255902859, now seen corresponding path program 1 times [2020-10-12 21:00:03,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:03,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867566882] [2020-10-12 21:00:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 21:00:03,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 21:00:03,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-12 21:00:03,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:03,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 21:00:03,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 21:00:03,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:03,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 21:00:03,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867566882] [2020-10-12 21:00:03,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:03,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:03,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583198237] [2020-10-12 21:00:03,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:03,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:03,780 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-10-12 21:00:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:03,806 INFO L93 Difference]: Finished difference Result 654 states and 942 transitions. [2020-10-12 21:00:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:03,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-10-12 21:00:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:03,810 INFO L225 Difference]: With dead ends: 654 [2020-10-12 21:00:03,810 INFO L226 Difference]: Without dead ends: 435 [2020-10-12 21:00:03,811 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 [2020-10-12 21:00:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-12 21:00:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 430. [2020-10-12 21:00:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-12 21:00:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 615 transitions. [2020-10-12 21:00:03,834 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 615 transitions. Word has length 54 [2020-10-12 21:00:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:03,835 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 615 transitions. [2020-10-12 21:00:03,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 615 transitions. [2020-10-12 21:00:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 21:00:03,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:03,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:03,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 21:00:03,837 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash -368212937, now seen corresponding path program 1 times [2020-10-12 21:00:03,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:03,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485345050] [2020-10-12 21:00:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 21:00:03,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-12 21:00:03,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:03,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 21:00:03,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 21:00:03,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:03,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:03,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:03,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:03,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:03,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:03,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:00:03,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485345050] [2020-10-12 21:00:03,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:03,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:03,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141179463] [2020-10-12 21:00:03,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:03,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:03,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:03,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:03,976 INFO L87 Difference]: Start difference. First operand 430 states and 615 transitions. Second operand 3 states. [2020-10-12 21:00:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:04,021 INFO L93 Difference]: Finished difference Result 856 states and 1224 transitions. [2020-10-12 21:00:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:04,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-10-12 21:00:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:04,025 INFO L225 Difference]: With dead ends: 856 [2020-10-12 21:00:04,025 INFO L226 Difference]: Without dead ends: 440 [2020-10-12 21:00:04,026 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 [2020-10-12 21:00:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-12 21:00:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 438. [2020-10-12 21:00:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-12 21:00:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 616 transitions. [2020-10-12 21:00:04,048 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 616 transitions. Word has length 55 [2020-10-12 21:00:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:04,048 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 616 transitions. [2020-10-12 21:00:04,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 616 transitions. [2020-10-12 21:00:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 21:00:04,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:04,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:04,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 21:00:04,050 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1724260221, now seen corresponding path program 1 times [2020-10-12 21:00:04,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:04,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299928891] [2020-10-12 21:00:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:04,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:04,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 21:00:04,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:00:04,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-12 21:00:04,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 21:00:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 21:00:04,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:04,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:04,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:04,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:04,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:04,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:00:04,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299928891] [2020-10-12 21:00:04,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:04,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:04,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448227501] [2020-10-12 21:00:04,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:04,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:04,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:04,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:04,259 INFO L87 Difference]: Start difference. First operand 438 states and 616 transitions. Second operand 3 states. [2020-10-12 21:00:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:04,313 INFO L93 Difference]: Finished difference Result 1283 states and 1808 transitions. [2020-10-12 21:00:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:04,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-10-12 21:00:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:04,318 INFO L225 Difference]: With dead ends: 1283 [2020-10-12 21:00:04,318 INFO L226 Difference]: Without dead ends: 859 [2020-10-12 21:00:04,320 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 [2020-10-12 21:00:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-12 21:00:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 656. [2020-10-12 21:00:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-10-12 21:00:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 924 transitions. [2020-10-12 21:00:04,354 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 924 transitions. Word has length 60 [2020-10-12 21:00:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:04,354 INFO L479 AbstractCegarLoop]: Abstraction has 656 states and 924 transitions. [2020-10-12 21:00:04,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 924 transitions. [2020-10-12 21:00:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 21:00:04,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:04,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:04,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 21:00:04,357 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2089626817, now seen corresponding path program 1 times [2020-10-12 21:00:04,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:04,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205363554] [2020-10-12 21:00:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:04,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:04,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 21:00:04,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:00:04,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 21:00:04,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:04,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:04,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 21:00:04,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 21:00:04,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:04,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:04,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:04,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:04,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:04,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:04,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:04,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:04,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:00:04,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205363554] [2020-10-12 21:00:04,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:04,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:04,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068529748] [2020-10-12 21:00:04,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:04,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:04,555 INFO L87 Difference]: Start difference. First operand 656 states and 924 transitions. Second operand 3 states. [2020-10-12 21:00:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:04,628 INFO L93 Difference]: Finished difference Result 1283 states and 1800 transitions. [2020-10-12 21:00:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:04,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-10-12 21:00:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:04,634 INFO L225 Difference]: With dead ends: 1283 [2020-10-12 21:00:04,634 INFO L226 Difference]: Without dead ends: 859 [2020-10-12 21:00:04,638 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 [2020-10-12 21:00:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-12 21:00:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 651. [2020-10-12 21:00:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-10-12 21:00:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 913 transitions. [2020-10-12 21:00:04,673 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 913 transitions. Word has length 60 [2020-10-12 21:00:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:04,674 INFO L479 AbstractCegarLoop]: Abstraction has 651 states and 913 transitions. [2020-10-12 21:00:04,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 913 transitions. [2020-10-12 21:00:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 21:00:04,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:04,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:04,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 21:00:04,676 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1796569389, now seen corresponding path program 1 times [2020-10-12 21:00:04,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:04,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777746253] [2020-10-12 21:00:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:04,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:04,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 21:00:04,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:04,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 21:00:04,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:00:04,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 21:00:04,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 21:00:04,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:00:04,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:00:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:00:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:00:04,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:00:04,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 21:00:04,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:00:04,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:00:04,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:00:04,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:00:04,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:00:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:00:04,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:00:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:00:04,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777746253] [2020-10-12 21:00:04,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:00:04,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 21:00:04,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691418692] [2020-10-12 21:00:04,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 21:00:04,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:00:04,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 21:00:04,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 21:00:04,843 INFO L87 Difference]: Start difference. First operand 651 states and 913 transitions. Second operand 3 states. [2020-10-12 21:00:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:00:04,909 INFO L93 Difference]: Finished difference Result 1915 states and 2683 transitions. [2020-10-12 21:00:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 21:00:04,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-10-12 21:00:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:00:04,916 INFO L225 Difference]: With dead ends: 1915 [2020-10-12 21:00:04,916 INFO L226 Difference]: Without dead ends: 1279 [2020-10-12 21:00:04,918 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 [2020-10-12 21:00:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2020-10-12 21:00:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1277. [2020-10-12 21:00:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-10-12 21:00:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1771 transitions. [2020-10-12 21:00:04,985 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1771 transitions. Word has length 61 [2020-10-12 21:00:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:00:04,986 INFO L479 AbstractCegarLoop]: Abstraction has 1277 states and 1771 transitions. [2020-10-12 21:00:04,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 21:00:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1771 transitions. [2020-10-12 21:00:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 21:00:04,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:00:04,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:00:04,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 21:00:04,995 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:00:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:00:04,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-10-12 21:00:04,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:00:04,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185192322] [2020-10-12 21:00:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:00:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 21:00:05,017 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 21:00:05,018 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 21:00:05,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 21:00:05,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 09:00:05 BoogieIcfgContainer [2020-10-12 21:00:05,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 21:00:05,069 INFO L168 Benchmark]: Toolchain (without parser) took 8107.66 ms. Allocated memory was 138.4 MB in the beginning and 332.4 MB in the end (delta: 194.0 MB). Free memory was 100.9 MB in the beginning and 203.0 MB in the end (delta: -102.1 MB). Peak memory consumption was 91.9 MB. Max. memory is 7.1 GB. [2020-10-12 21:00:05,070 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 21:00:05,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 541.69 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.7 MB in the beginning and 177.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-10-12 21:00:05,071 INFO L168 Benchmark]: Boogie Preprocessor took 58.44 ms. Allocated memory is still 202.4 MB. Free memory was 177.0 MB in the beginning and 174.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-12 21:00:05,072 INFO L168 Benchmark]: RCFGBuilder took 856.90 ms. Allocated memory is still 202.4 MB. Free memory was 174.2 MB in the beginning and 120.9 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-10-12 21:00:05,073 INFO L168 Benchmark]: TraceAbstraction took 6644.97 ms. Allocated memory was 202.4 MB in the beginning and 332.4 MB in the end (delta: 130.0 MB). Free memory was 120.2 MB in the beginning and 203.0 MB in the end (delta: -82.8 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-10-12 21:00:05,075 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 541.69 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.7 MB in the beginning and 177.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.44 ms. Allocated memory is still 202.4 MB. Free memory was 177.0 MB in the beginning and 174.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 856.90 ms. Allocated memory is still 202.4 MB. Free memory was 174.2 MB in the beginning and 120.9 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6644.97 ms. Allocated memory was 202.4 MB in the beginning and 332.4 MB in the end (delta: 130.0 MB). Free memory was 120.2 MB in the beginning and 203.0 MB in the end (delta: -82.8 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 13, TraceHistogramMax: 2, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2868 SDtfs, 2394 SDslu, 2422 SDs, 0 SdLazy, 1008 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1277occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 659 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 665 NumberOfCodeBlocks, 665 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 74429 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 133/133 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...