/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=NARROWEST --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/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 12:54:46,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 12:54:46,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 12:54:46,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 12:54:46,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 12:54:46,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 12:54:46,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 12:54:46,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 12:54:46,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 12:54:46,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 12:54:46,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 12:54:46,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 12:54:46,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 12:54:46,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 12:54:46,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 12:54:46,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 12:54:46,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 12:54:46,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 12:54:46,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 12:54:46,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 12:54:46,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 12:54:46,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 12:54:46,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 12:54:46,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 12:54:46,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 12:54:46,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 12:54:46,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 12:54:46,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 12:54:46,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 12:54:46,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 12:54:46,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 12:54:46,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 12:54:46,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 12:54:46,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 12:54:46,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 12:54:46,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 12:54:46,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 12:54:46,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 12:54:46,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 12:54:46,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 12:54:46,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 12:54:46,658 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 [2020-10-13 12:54:46,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 12:54:46,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 12:54:46,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 12:54:46,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 12:54:46,703 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 12:54:46,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 12:54:46,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 12:54:46,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 12:54:46,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 12:54:46,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 12:54:46,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 12:54:46,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 12:54:46,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 12:54:46,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 12:54:46,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 12:54:46,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 12:54:46,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 12:54:46,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 12:54:46,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 12:54:46,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 12:54:46,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 12:54:46,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 12:54:46,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 12:54:46,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 12:54:46,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 12:54:46,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 12:54:46,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 12:54:46,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 12:54:46,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 12:54:46,709 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 12:54:47,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 12:54:47,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 12:54:47,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 12:54:47,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 12:54:47,025 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 12:54:47,026 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-10-13 12:54:47,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/172a4a2af/65233bcf2b0542f391744924116a5b73/FLAGb54c2bb32 [2020-10-13 12:54:47,469 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 12:54:47,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-10-13 12:54:47,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/172a4a2af/65233bcf2b0542f391744924116a5b73/FLAGb54c2bb32 [2020-10-13 12:54:47,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/172a4a2af/65233bcf2b0542f391744924116a5b73 [2020-10-13 12:54:47,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 12:54:47,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 12:54:47,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 12:54:47,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 12:54:47,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 12:54:47,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:47" (1/1) ... [2020-10-13 12:54:47,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e6d6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:47, skipping insertion in model container [2020-10-13 12:54:47,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:47" (1/1) ... [2020-10-13 12:54:47,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 12:54:47,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 12:54:48,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:54:48,150 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 12:54:48,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:54:48,185 INFO L208 MainTranslator]: Completed translation [2020-10-13 12:54:48,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48 WrapperNode [2020-10-13 12:54:48,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 12:54:48,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 12:54:48,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 12:54:48,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 12:54:48,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (1/1) ... [2020-10-13 12:54:48,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 12:54:48,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 12:54:48,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 12:54:48,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 12:54:48,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (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 [2020-10-13 12:54:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 12:54:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 12:54:48,390 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-10-13 12:54:48,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 12:54:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 12:54:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 12:54:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-10-13 12:54:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 12:54:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 12:54:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 12:54:48,554 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 12:54:48,554 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 12:54:48,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:48 BoogieIcfgContainer [2020-10-13 12:54:48,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 12:54:48,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 12:54:48,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 12:54:48,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 12:54:48,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:54:47" (1/3) ... [2020-10-13 12:54:48,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6410b951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:54:48, skipping insertion in model container [2020-10-13 12:54:48,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:48" (2/3) ... [2020-10-13 12:54:48,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6410b951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:54:48, skipping insertion in model container [2020-10-13 12:54:48,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:48" (3/3) ... [2020-10-13 12:54:48,566 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-10-13 12:54:48,576 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 12:54:48,583 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 12:54:48,597 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 12:54:48,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 12:54:48,629 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 12:54:48,629 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 12:54:48,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 12:54:48,630 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 12:54:48,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 12:54:48,630 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 12:54:48,631 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 12:54:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 12:54:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 12:54:48,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:48,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:48,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-10-13 12:54:48,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:48,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589998682] [2020-10-13 12:54:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:48,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:48,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 12:54:48,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:48,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 12:54:48,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:48,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:48,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 12:54:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:54:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 12:54:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:54:49,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:49,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:54:49,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:49,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:54:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:49,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 12:54:49,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:49,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:49,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:49,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 12:54:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:49,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589998682] [2020-10-13 12:54:49,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:54:49,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 12:54:49,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416037468] [2020-10-13 12:54:49,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:54:49,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:54:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:54:49,139 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-13 12:54:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:49,272 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-13 12:54:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:54:49,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 12:54:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:49,284 INFO L225 Difference]: With dead ends: 36 [2020-10-13 12:54:49,285 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 12:54:49,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:54:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 12:54:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 12:54:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 12:54:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-13 12:54:49,334 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-10-13 12:54:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:49,334 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-13 12:54:49,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:54:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-13 12:54:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 12:54:49,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:49,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:49,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 12:54:49,338 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-10-13 12:54:49,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:49,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735960002] [2020-10-13 12:54:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 12:54:49,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:49,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-13 12:54:49,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 12:54:49,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:49,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 12:54:49,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:54:49,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:49,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:49,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:49,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:54:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 12:54:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-13 12:54:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 12:54:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:49,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:49,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 12:54:49,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:54:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:54:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:54:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 12:54:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:49,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:49,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:49,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:49,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 12:54:49,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:49,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 12:54:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 12:54:49,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735960002] [2020-10-13 12:54:49,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:49,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 12:54:49,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967943045] [2020-10-13 12:54:49,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:54:49,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:49,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:54:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:54:49,904 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-10-13 12:54:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:50,045 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-10-13 12:54:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:54:50,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 12:54:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:50,049 INFO L225 Difference]: With dead ends: 39 [2020-10-13 12:54:50,049 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 12:54:50,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 12:54:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 12:54:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 12:54:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 12:54:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 12:54:50,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-10-13 12:54:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:50,071 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 12:54:50,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:54:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 12:54:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 12:54:50,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:50,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:50,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 12:54:50,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-10-13 12:54:50,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:50,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467565794] [2020-10-13 12:54:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:50,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:50,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 12:54:50,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-13 12:54:50,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 12:54:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 12:54:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 12:54:50,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:50,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:50,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:54:50,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:50,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:50,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:50,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:50,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:54:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:50,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:50,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:54:50,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:50,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-13 12:54:50,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:50,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 12:54:50,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:50,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 12:54:50,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:50,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:50,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:50,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:54:50,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:50,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 12:54:50,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:54:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:50,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:50,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:54:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:50,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:50,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:50,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:50,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 12:54:50,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:54:50,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467565794] [2020-10-13 12:54:50,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:50,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 12:54:50,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803132864] [2020-10-13 12:54:50,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 12:54:50,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:50,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 12:54:50,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:54:50,825 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 11 states. [2020-10-13 12:54:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:51,010 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-10-13 12:54:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 12:54:51,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 12:54:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:51,013 INFO L225 Difference]: With dead ends: 34 [2020-10-13 12:54:51,013 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 12:54:51,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-13 12:54:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 12:54:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 12:54:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 12:54:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-10-13 12:54:51,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-10-13 12:54:51,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:51,022 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-10-13 12:54:51,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 12:54:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-10-13 12:54:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 12:54:51,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:51,025 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:51,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 12:54:51,025 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1293014720, now seen corresponding path program 2 times [2020-10-13 12:54:51,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:51,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120966974] [2020-10-13 12:54:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:51,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 12:54:51,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 12:54:51,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-13 12:54:51,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 12:54:51,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 12:54:51,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:51,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:51,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:51,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:54:51,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:51,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:51,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:54:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:51,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:51,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 12:54:51,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:54:51,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-13 12:54:51,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:51,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 12:54:51,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 12:54:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:51,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:51,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:51,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:54:51,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 12:54:51,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:51,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:54:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:54:51,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 12:54:51,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:54:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:51,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:51,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:54:51,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:54:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-13 12:54:51,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:54:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 12:54:51,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:51,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:51,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:52,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:54:52,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:52,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 12:54:52,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:52,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:52,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:52,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:54:52,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:52,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:54:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:52,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 12:54:52,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:54:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:54:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 12:54:52,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120966974] [2020-10-13 12:54:52,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:52,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 12:54:52,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396993425] [2020-10-13 12:54:52,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 12:54:52,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 12:54:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:54:52,048 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 7 states. [2020-10-13 12:54:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:52,167 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2020-10-13 12:54:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:54:52,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-13 12:54:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:52,170 INFO L225 Difference]: With dead ends: 51 [2020-10-13 12:54:52,171 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 12:54:52,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-13 12:54:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 12:54:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 12:54:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 12:54:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-13 12:54:52,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 42 [2020-10-13 12:54:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:52,186 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-13 12:54:52,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 12:54:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-13 12:54:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 12:54:52,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:52,192 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:52,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 12:54:52,192 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-10-13 12:54:52,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:52,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337937053] [2020-10-13 12:54:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:52,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:53,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:53,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 12:54:53,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 12:54:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1441 [2020-10-13 12:54:53,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 12:54:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 12:54:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 12:54:53,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:53,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:53,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:53,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:54:53,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:53,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:53,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:53,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:53,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:53,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:53,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:53,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:54:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:53,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:53,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:54,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 12:54:54,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 12:54:54,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-13 12:54:54,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 12:54:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 12:54:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 12:54:54,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:54,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:54:54,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:54:54,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-13 12:54:54,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 12:54:54,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 12:54:54,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:54,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:54,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:54:54,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:54,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 12:54:54,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:54,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:54:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:54,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:54,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:54:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:54,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:54,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:54,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:54,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:54:54,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:54,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:54:54,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:54,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:54:54,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:54,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 12:54:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:54,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:54,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:54,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 12:54:54,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:54,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:54:54,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:54:54,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:54:54,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 12:54:54,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337937053] [2020-10-13 12:54:54,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:54,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 12:54:54,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255810628] [2020-10-13 12:54:54,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 12:54:54,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 12:54:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:54:54,467 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 8 states. [2020-10-13 12:54:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:54,598 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-13 12:54:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:54:54,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 12:54:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:54,601 INFO L225 Difference]: With dead ends: 51 [2020-10-13 12:54:54,602 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 12:54:54,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 12:54:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 12:54:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 12:54:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 12:54:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 12:54:54,615 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 41 [2020-10-13 12:54:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:54,615 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 12:54:54,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 12:54:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 12:54:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 12:54:54,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:54,619 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:54,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 12:54:54,620 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-10-13 12:54:54,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:54,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717343787] [2020-10-13 12:54:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:55,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:55,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 12:54:55,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:54:55,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-13 12:54:55,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 12:54:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 12:54:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 12:54:55,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:55,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:55,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:54:55,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:55,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 12:54:55,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:55,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:55,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:55,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:55,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:55,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:54:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:55,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:55,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:56,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:56,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 12:54:56,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:54:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-13 12:54:56,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 12:54:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 12:54:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:56,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:56,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:57,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:54:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-13 12:54:57,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 12:54:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 12:54:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:57,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:54:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:57,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:54:57,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 12:54:57,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:54:57,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:57,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:54:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:57,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:57,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:54:57,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:57,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 12:54:57,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:57,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:54:57,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:57,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:54:57,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:57,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 12:54:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:57,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:54:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 12:54:57,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:57,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:54:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:54:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 12:54:57,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717343787] [2020-10-13 12:54:57,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:57,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 12:54:57,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534217087] [2020-10-13 12:54:57,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 12:54:57,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 12:54:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 12:54:57,163 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 13 states. [2020-10-13 12:54:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:57,456 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-13 12:54:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 12:54:57,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-13 12:54:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:57,458 INFO L225 Difference]: With dead ends: 39 [2020-10-13 12:54:57,458 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 12:54:57,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-13 12:54:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 12:54:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 12:54:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 12:54:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-13 12:54:57,473 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 42 [2020-10-13 12:54:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:57,476 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-13 12:54:57,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 12:54:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-13 12:54:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 12:54:57,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:57,479 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:57,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 12:54:57,482 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2020-10-13 12:54:57,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:57,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964123447] [2020-10-13 12:54:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:57,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:57,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:58,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:00,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:02,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 12:55:02,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 12:55:02,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 12:55:02,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 12:55:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 12:55:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 12:55:02,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:02,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:02,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:02,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:02,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:02,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:02,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:02,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:02,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:02,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:55:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:02,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:02,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 12:55:06,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 12:55:06,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3874 [2020-10-13 12:55:06,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 12:55:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 12:55:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 12:55:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:55:06,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:06,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 12:55:06,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:55:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 12:55:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:06,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:06,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:06,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 12:55:06,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:55:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:06,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:06,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:55:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:06,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:06,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:55:06,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:55:06,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:06,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:06,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:06,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 12:55:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:55:06,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 12:55:06,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:55:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:55:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 12:55:06,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:06,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:06,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:06,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:06,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 12:55:06,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:55:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:06,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:55:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:06,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:06,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:06,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 12:55:06,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:55:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:06,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 12:55:06,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964123447] [2020-10-13 12:55:06,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:06,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 12:55:06,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256292235] [2020-10-13 12:55:06,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 12:55:06,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 12:55:06,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:55:06,782 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 8 states. [2020-10-13 12:55:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:06,993 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2020-10-13 12:55:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 12:55:06,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-13 12:55:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:06,995 INFO L225 Difference]: With dead ends: 66 [2020-10-13 12:55:06,995 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 12:55:06,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 12:55:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 12:55:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-13 12:55:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 12:55:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-10-13 12:55:07,011 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 55 [2020-10-13 12:55:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:07,012 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-10-13 12:55:07,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 12:55:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-10-13 12:55:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 12:55:07,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:07,017 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:07,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 12:55:07,017 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 6 times [2020-10-13 12:55:07,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:07,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388505417] [2020-10-13 12:55:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:07,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:07,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:07,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:07,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:09,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:12,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:12,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 12:55:12,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 12:55:12,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 12:55:12,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 12:55:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 12:55:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 12:55:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:12,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:12,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:12,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:12,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:12,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 12:55:12,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:12,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:12,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 12:55:12,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 12:55:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:12,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:12,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 12:55:17,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 12:55:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 12:55:17,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 12:55:17,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 12:55:17,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 12:55:17,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 12:55:17,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 12:55:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 12:55:17,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:55:17,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 12:55:17,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 12:55:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 12:55:17,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:17,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:55:17,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 12:55:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:17,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:55:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:17,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:55:17,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:17,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:17,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 12:55:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 12:55:17,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:55:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 12:55:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:55:17,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:55:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 12:55:17,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 12:55:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 12:55:17,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-13 12:55:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:17,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 12:55:17,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:55:17,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:17,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 12:55:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:17,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:17,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:17,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:17,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 12:55:17,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 86 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 12:55:17,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388505417] [2020-10-13 12:55:17,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:17,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 12:55:17,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636807004] [2020-10-13 12:55:17,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 12:55:17,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 12:55:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 12:55:17,584 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 19 states. [2020-10-13 12:55:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:17,917 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 12:55:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 12:55:17,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-10-13 12:55:17,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:17,919 INFO L225 Difference]: With dead ends: 41 [2020-10-13 12:55:17,919 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 12:55:17,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2020-10-13 12:55:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 12:55:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 12:55:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 12:55:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 12:55:17,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-10-13 12:55:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:17,926 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 12:55:17,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 12:55:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 12:55:17,926 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 12:55:17,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 12:55:17,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 12:55:18,087 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-10-13 12:55:18,088 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-10-13 12:55:18,088 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-10-13 12:55:18,088 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-10-13 12:55:18,088 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= 3 fibonacci_~n)) (.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 .cse1 (<= 2 |fibonacci_#t~ret0|)) (and (<= 1 |fibonacci_#t~ret0|) (= 2 fibonacci_~n) .cse1) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 .cse1))) [2020-10-13 12:55:18,089 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-10-13 12:55:18,089 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-10-13 12:55:18,089 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-10-13 12:55:18,089 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-10-13 12:55:18,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 12:55:18,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 12:55:18,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 12:55:18,089 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 12:55:18,090 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 12:55:18,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 12:55:18,090 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-10-13 12:55:18,090 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-10-13 12:55:18,090 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-10-13 12:55:18,090 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-10-13 12:55:18,090 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-10-13 12:55:18,091 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-10-13 12:55:18,091 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-10-13 12:55:18,091 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-10-13 12:55:18,091 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-10-13 12:55:18,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:55:18 BoogieIcfgContainer [2020-10-13 12:55:18,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 12:55:18,099 INFO L168 Benchmark]: Toolchain (without parser) took 30244.48 ms. Allocated memory was 147.3 MB in the beginning and 521.7 MB in the end (delta: 374.3 MB). Free memory was 103.6 MB in the beginning and 141.4 MB in the end (delta: -37.9 MB). Peak memory consumption was 336.5 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:18,100 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 12:55:18,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.62 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 94.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:18,102 INFO L168 Benchmark]: Boogie Preprocessor took 140.72 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 94.0 MB in the beginning and 183.6 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:18,102 INFO L168 Benchmark]: RCFGBuilder took 229.52 ms. Allocated memory is still 205.0 MB. Free memory was 183.0 MB in the beginning and 171.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:18,103 INFO L168 Benchmark]: TraceAbstraction took 29537.60 ms. Allocated memory was 205.0 MB in the beginning and 521.7 MB in the end (delta: 316.7 MB). Free memory was 170.3 MB in the beginning and 141.4 MB in the end (delta: 28.9 MB). Peak memory consumption was 345.6 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:18,107 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.62 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 94.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.72 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 94.0 MB in the beginning and 183.6 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 229.52 ms. Allocated memory is still 205.0 MB. Free memory was 183.0 MB in the beginning and 171.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29537.60 ms. Allocated memory was 205.0 MB in the beginning and 521.7 MB in the end (delta: 316.7 MB). Free memory was 170.3 MB in the beginning and 141.4 MB in the end (delta: 28.9 MB). Peak memory consumption was 345.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.3s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 131 SDslu, 525 SDs, 0 SdLazy, 787 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 59 PreInvPairs, 102 NumberOfFragments, 46 HoareAnnotationTreeSize, 59 FomulaSimplifications, 433 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 129 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 27.1s InterpolantComputationTime, 318 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 38588 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 279/467 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 correct! Received shutdown request...