/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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:55:10,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:55:10,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:55:10,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:55:10,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:55:10,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:55:10,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:55:10,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:55:10,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:55:10,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:55:10,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:55:10,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:55:10,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:55:10,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:55:10,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:55:10,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:55:10,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:55:10,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:55:10,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:55:10,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:55:10,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:55:10,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:55:10,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:55:10,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:55:10,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:55:10,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:55:10,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:55:10,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:55:10,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:55:10,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:55:10,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:55:10,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:55:10,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:55:10,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:55:10,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:55:10,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:55:10,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:55:10,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:55:10,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:55:10,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:55:10,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:55:10,476 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 10:55:10,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:55:10,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:55:10,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:55:10,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:55:10,512 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:55:10,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:55:10,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:55:10,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:55:10,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:55:10,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:55:10,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:55:10,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:55:10,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:55:10,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:55:10,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:55:10,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:55:10,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:55:10,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:55:10,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:55:10,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:55:10,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:55:10,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:10,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:55:10,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:55:10,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:55:10,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:55:10,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:55:10,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:55:10,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:55:10,517 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 10:55:10,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:55:10,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:55:10,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:55:10,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:55:10,846 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:55:10,847 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2020-10-13 10:55:10,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1688cde3b/bf251742f8f348a59fd4afe047336ef3/FLAG804501b89 [2020-10-13 10:55:11,417 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:55:11,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/compact.c [2020-10-13 10:55:11,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1688cde3b/bf251742f8f348a59fd4afe047336ef3/FLAG804501b89 [2020-10-13 10:55:11,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1688cde3b/bf251742f8f348a59fd4afe047336ef3 [2020-10-13 10:55:11,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:55:11,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:55:11,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:11,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:55:11,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:55:11,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:11" (1/1) ... [2020-10-13 10:55:11,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493ee38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:11, skipping insertion in model container [2020-10-13 10:55:11,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:11" (1/1) ... [2020-10-13 10:55:11,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:55:11,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:55:12,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:12,061 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:55:12,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:12,185 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:55:12,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12 WrapperNode [2020-10-13 10:55:12,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:12,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:55:12,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:55:12,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:55:12,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (1/1) ... [2020-10-13 10:55:12,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:55:12,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:55:12,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:55:12,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:55:12,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (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 10:55:12,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:55:12,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:55:12,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:55:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:55:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 10:55:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:55:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:55:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:55:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:55:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:55:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:55:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:55:12,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:55:12,602 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:55:12,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:12 BoogieIcfgContainer [2020-10-13 10:55:12,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:55:12,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:55:12,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:55:12,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:55:12,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:55:11" (1/3) ... [2020-10-13 10:55:12,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494963df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:12, skipping insertion in model container [2020-10-13 10:55:12,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:12" (2/3) ... [2020-10-13 10:55:12,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494963df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:12, skipping insertion in model container [2020-10-13 10:55:12,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:12" (3/3) ... [2020-10-13 10:55:12,615 INFO L109 eAbstractionObserver]: Analyzing ICFG compact.c [2020-10-13 10:55:12,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:55:12,633 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:55:12,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:55:12,670 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:55:12,670 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:55:12,670 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:55:12,670 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:55:12,671 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:55:12,671 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:55:12,671 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:55:12,671 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:55:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-13 10:55:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:55:12,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:12,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:12,697 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash -384233600, now seen corresponding path program 1 times [2020-10-13 10:55:12,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:12,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896215630] [2020-10-13 10:55:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:12,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:12,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:12,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:12,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:55:12,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-13 10:55:12,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:12,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:55:12,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:12,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:55:13,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:13,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:13,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:55:13,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:13,052 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 10:55:13,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896215630] [2020-10-13 10:55:13,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:13,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:55:13,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121710145] [2020-10-13 10:55:13,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:55:13,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:55:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:55:13,079 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-10-13 10:55:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:13,162 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-10-13 10:55:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:55:13,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:55:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:13,175 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:55:13,175 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:55:13,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:55:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:55:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-10-13 10:55:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:55:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:55:13,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:55:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:13,216 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:55:13,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:55:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:55:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:55:13,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:13,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:13,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:55:13,218 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:13,218 INFO L82 PathProgramCache]: Analyzing trace with hash -384412656, now seen corresponding path program 1 times [2020-10-13 10:55:13,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:13,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984163114] [2020-10-13 10:55:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:13,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:55:13,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 10:55:13,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:55:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:55:13,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:13,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:13,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:13,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:13,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:55:13,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:13,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:13,477 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 10:55:13,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984163114] [2020-10-13 10:55:13,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:13,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:55:13,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693958979] [2020-10-13 10:55:13,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:55:13,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:55:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:13,482 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-13 10:55:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:13,561 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-13 10:55:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:55:13,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-13 10:55:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:13,563 INFO L225 Difference]: With dead ends: 25 [2020-10-13 10:55:13,563 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:55:13,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:55:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-10-13 10:55:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:55:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-13 10:55:13,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2020-10-13 10:55:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:13,572 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-13 10:55:13,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:55:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-13 10:55:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:55:13,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:13,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:13,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:55:13,574 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1313634531, now seen corresponding path program 1 times [2020-10-13 10:55:13,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:13,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955802083] [2020-10-13 10:55:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:14,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:14,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:55:14,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:14,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-13 10:55:14,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:14,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:55:14,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:55:14,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:14,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:14,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:14,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:14,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:14,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:14,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:55:14,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955802083] [2020-10-13 10:55:14,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:14,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:55:14,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492259135] [2020-10-13 10:55:14,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:55:14,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:14,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:55:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:14,091 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-13 10:55:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:14,172 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-13 10:55:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:14,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:55:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:14,173 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:55:14,174 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:55:14,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:55:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 10:55:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:55:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 10:55:14,181 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-13 10:55:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:14,181 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 10:55:14,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:55:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 10:55:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:55:14,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:14,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:14,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:55:14,183 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1458887604, now seen corresponding path program 2 times [2020-10-13 10:55:14,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:14,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078146202] [2020-10-13 10:55:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:14,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:14,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:14,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:14,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:55:14,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:14,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-13 10:55:14,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:14,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:14,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:14,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:14,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:14,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:14,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:14,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:14,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:14,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:14,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:55:14,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:55:14,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078146202] [2020-10-13 10:55:14,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:14,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:14,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280617823] [2020-10-13 10:55:14,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:14,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:14,813 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-13 10:55:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:14,952 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-13 10:55:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:55:14,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:55:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:14,954 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:55:14,954 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:55:14,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:55:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 10:55:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:55:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 10:55:14,962 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-10-13 10:55:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:14,962 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 10:55:14,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 10:55:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:55:14,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:14,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:14,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:55:14,964 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -152547009, now seen corresponding path program 3 times [2020-10-13 10:55:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:14,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74640220] [2020-10-13 10:55:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:14,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:15,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:16,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:55:16,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-13 10:55:16,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:16,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:16,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:16,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:55:16,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:16,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:16,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:16,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:16,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:55:16,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74640220] [2020-10-13 10:55:16,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:16,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:55:16,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965871139] [2020-10-13 10:55:16,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:55:16,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:55:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:16,292 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-13 10:55:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:16,437 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-13 10:55:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:55:16,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-13 10:55:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:16,439 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:55:16,440 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:55:16,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:55:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-13 10:55:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:55:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 10:55:16,448 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-13 10:55:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:16,448 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 10:55:16,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:55:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 10:55:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:55:16,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:16,450 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:16,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:55:16,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2023633752, now seen corresponding path program 4 times [2020-10-13 10:55:16,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:16,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105796122] [2020-10-13 10:55:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:16,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:18,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:18,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:55:18,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:18,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1807 [2020-10-13 10:55:18,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:18,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:55:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:55:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:18,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:18,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:18,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:18,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:18,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:55:18,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:18,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:18,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:18,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:18,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:55:18,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105796122] [2020-10-13 10:55:18,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:18,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:55:18,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881127775] [2020-10-13 10:55:18,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:55:18,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:18,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:55:18,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:18,404 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-13 10:55:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:18,589 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-13 10:55:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:55:18,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:55:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:18,591 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:55:18,591 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:55:18,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:55:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-13 10:55:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:55:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 10:55:18,600 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-10-13 10:55:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:18,600 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 10:55:18,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:55:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 10:55:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:55:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:18,602 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:18,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:55:18,602 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1510619547, now seen corresponding path program 5 times [2020-10-13 10:55:18,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:18,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651359799] [2020-10-13 10:55:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:18,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:19,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:21,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:21,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:55:21,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:21,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3359 [2020-10-13 10:55:21,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:55:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:55:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:22,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:22,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:22,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:22,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:22,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 10:55:22,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651359799] [2020-10-13 10:55:22,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:22,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:55:22,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471083567] [2020-10-13 10:55:22,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:55:22,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:55:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:22,116 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 9 states. [2020-10-13 10:55:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:22,324 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-13 10:55:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:55:22,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 10:55:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:22,326 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:55:22,326 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:55:22,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:55:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-13 10:55:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:55:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 10:55:22,334 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2020-10-13 10:55:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:22,335 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 10:55:22,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:55:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 10:55:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:55:22,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:22,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:22,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:55:22,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash -468673796, now seen corresponding path program 6 times [2020-10-13 10:55:22,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:22,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999358323] [2020-10-13 10:55:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:22,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:55:27,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:27,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-13 10:55:27,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:55:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:55:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:27,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:27,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:27,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:55:27,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:27,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:27,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 10:55:27,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999358323] [2020-10-13 10:55:27,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:27,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:27,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93598948] [2020-10-13 10:55:27,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:27,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:27,653 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-10-13 10:55:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:27,947 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-10-13 10:55:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:55:27,948 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 10:55:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:27,949 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:55:27,949 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:55:27,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:55:27,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-13 10:55:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:55:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 10:55:27,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-10-13 10:55:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:27,958 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 10:55:27,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:55:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 10:55:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:55:27,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:27,960 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:27,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:55:27,960 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:27,960 INFO L82 PathProgramCache]: Analyzing trace with hash -671878665, now seen corresponding path program 7 times [2020-10-13 10:55:27,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:27,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354142970] [2020-10-13 10:55:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:33,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:33,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:55:33,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 10:55:33,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:55:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:55:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:33,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:33,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:33,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:33,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:55:33,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 10:55:33,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354142970] [2020-10-13 10:55:33,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:33,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:55:33,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288192983] [2020-10-13 10:55:33,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:55:33,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:55:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:33,233 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 11 states. [2020-10-13 10:55:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:33,535 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2020-10-13 10:55:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:55:33,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 10:55:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:33,536 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:55:33,536 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:55:33,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:55:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:55:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-13 10:55:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:55:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-13 10:55:33,552 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2020-10-13 10:55:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:33,552 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-13 10:55:33,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:55:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-13 10:55:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:55:33,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:33,557 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:33,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:55:33,557 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:33,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1949674848, now seen corresponding path program 8 times [2020-10-13 10:55:33,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:33,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771252355] [2020-10-13 10:55:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:38,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:38,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:55:38,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 10:55:38,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:55:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:55:38,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:38,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:38,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:38,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:38,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:38,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:55:38,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:38,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:38,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:38,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 10:55:38,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771252355] [2020-10-13 10:55:38,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:38,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:55:38,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106682681] [2020-10-13 10:55:38,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:55:38,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:55:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:55:38,798 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 12 states. [2020-10-13 10:55:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:39,126 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-13 10:55:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:55:39,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 10:55:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:39,127 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:55:39,127 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:55:39,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:55:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:55:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-13 10:55:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:55:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 10:55:39,139 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-10-13 10:55:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:39,140 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 10:55:39,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:55:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 10:55:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:55:39,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:39,141 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:39,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:55:39,141 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash -496551341, now seen corresponding path program 9 times [2020-10-13 10:55:39,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:39,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470229781] [2020-10-13 10:55:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:39,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:55:44,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:44,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 10:55:44,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:55:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:55:44,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:44,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:44,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:44,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:44,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 10:55:44,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470229781] [2020-10-13 10:55:44,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:44,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:55:44,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534371015] [2020-10-13 10:55:44,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:55:44,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:44,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:55:44,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:55:44,422 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 13 states. [2020-10-13 10:55:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:44,804 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-13 10:55:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:55:44,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-13 10:55:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:44,805 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:55:44,805 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:55:44,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:55:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:55:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-13 10:55:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:55:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 10:55:44,825 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2020-10-13 10:55:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:44,825 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 10:55:44,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:55:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 10:55:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:55:44,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:44,826 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:44,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:55:44,827 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash -490104252, now seen corresponding path program 10 times [2020-10-13 10:55:44,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:44,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574709134] [2020-10-13 10:55:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:44,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:55:49,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:49,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 10:55:49,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:55:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:55:49,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:50,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:50,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:50,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:50,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:55:50,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:50,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 10:55:50,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574709134] [2020-10-13 10:55:50,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:50,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:55:50,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054526021] [2020-10-13 10:55:50,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:55:50,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:55:50,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:55:50,184 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 14 states. [2020-10-13 10:55:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:50,627 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2020-10-13 10:55:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:55:50,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-13 10:55:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:50,629 INFO L225 Difference]: With dead ends: 103 [2020-10-13 10:55:50,629 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:55:50,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:55:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-13 10:55:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:55:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-13 10:55:50,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2020-10-13 10:55:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:50,639 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-13 10:55:50,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:55:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-13 10:55:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:55:50,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:50,640 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:55:50,640 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -660221265, now seen corresponding path program 11 times [2020-10-13 10:55:50,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:50,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266641881] [2020-10-13 10:55:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:55:55,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:55,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 10:55:55,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:55:55,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:55:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:55,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:55,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:55,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:55:55,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:55,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 10:55:55,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266641881] [2020-10-13 10:55:55,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:55,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:55:55,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358674587] [2020-10-13 10:55:55,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:55:55,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:55:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:55,992 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 15 states. [2020-10-13 10:55:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:56,492 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-13 10:55:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:55:56,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-13 10:55:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:56,495 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:55:56,495 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:55:56,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:55:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:55:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-13 10:55:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:55:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-13 10:55:56,504 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2020-10-13 10:55:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:56,504 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-13 10:55:56,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:55:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-13 10:55:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:55:56,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:56,505 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:56,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:55:56,506 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash 9220584, now seen corresponding path program 12 times [2020-10-13 10:55:56,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:56,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119598777] [2020-10-13 10:55:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:56,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:01,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:56:01,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5158 [2020-10-13 10:56:01,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:56:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:56:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:01,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:01,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:01,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:01,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:01,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:01,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:01,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:01,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:01,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:56:01,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119598777] [2020-10-13 10:56:01,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:01,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:56:01,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912750279] [2020-10-13 10:56:01,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:56:01,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:56:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:56:01,994 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 16 states. [2020-10-13 10:56:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:02,637 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2020-10-13 10:56:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:56:02,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-13 10:56:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:02,640 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:56:02,640 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:56:02,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:56:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-13 10:56:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:56:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 10:56:02,656 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2020-10-13 10:56:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:02,657 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 10:56:02,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:56:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 10:56:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:56:02,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:02,661 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:02,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:56:02,661 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash -479102197, now seen corresponding path program 13 times [2020-10-13 10:56:02,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:02,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75658231] [2020-10-13 10:56:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:02,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:06,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:07,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:07,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:56:07,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:07,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-13 10:56:07,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:07,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:56:07,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:07,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:56:07,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:08,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:08,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:08,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:08,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:08,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:56:08,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:08,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:08,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:08,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:08,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 10:56:08,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75658231] [2020-10-13 10:56:08,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:08,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:56:08,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997031084] [2020-10-13 10:56:08,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:56:08,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:56:08,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:08,284 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 17 states. [2020-10-13 10:56:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:09,008 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2020-10-13 10:56:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:56:09,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-13 10:56:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:09,010 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:56:09,010 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:56:09,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:56:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:56:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-13 10:56:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:56:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-13 10:56:09,031 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2020-10-13 10:56:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:09,031 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-13 10:56:09,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:56:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-13 10:56:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:56:09,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:09,033 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:09,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:56:09,033 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash -988685940, now seen corresponding path program 14 times [2020-10-13 10:56:09,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:09,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323692130] [2020-10-13 10:56:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:09,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:14,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:14,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:56:14,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-10-13 10:56:14,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:56:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:56:14,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:14,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:14,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:14,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:14,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:14,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:56:14,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323692130] [2020-10-13 10:56:14,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:14,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:56:14,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352037267] [2020-10-13 10:56:14,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:56:14,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:14,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:56:14,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:56:14,609 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 18 states. [2020-10-13 10:56:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:15,297 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-10-13 10:56:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:56:15,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-10-13 10:56:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:15,299 INFO L225 Difference]: With dead ends: 135 [2020-10-13 10:56:15,299 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:56:15,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:56:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:56:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-13 10:56:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:56:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-13 10:56:15,306 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2020-10-13 10:56:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:15,306 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-13 10:56:15,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:56:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-13 10:56:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 10:56:15,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:15,307 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:15,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:56:15,308 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:15,308 INFO L82 PathProgramCache]: Analyzing trace with hash -787745945, now seen corresponding path program 15 times [2020-10-13 10:56:15,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:15,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560590364] [2020-10-13 10:56:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:20,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 10:56:20,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:20,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5146 [2020-10-13 10:56:20,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:56:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:56:20,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:20,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:20,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:20,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:20,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:56:20,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:20,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:20,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:20,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 10:56:20,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560590364] [2020-10-13 10:56:20,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:20,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:56:20,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724823831] [2020-10-13 10:56:20,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:56:20,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:20,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:56:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:56:20,805 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 19 states. [2020-10-13 10:56:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:21,606 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-10-13 10:56:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:56:21,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-13 10:56:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:21,607 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:56:21,607 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:56:21,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:56:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:56:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-13 10:56:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:56:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-13 10:56:21,615 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2020-10-13 10:56:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:21,616 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-13 10:56:21,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:56:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-13 10:56:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:56:21,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:21,617 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:21,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:56:21,618 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -52997840, now seen corresponding path program 16 times [2020-10-13 10:56:21,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:21,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779494765] [2020-10-13 10:56:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:21,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5325 [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:56:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:26,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:56:26,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:27,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:27,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:27,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 10:56:27,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779494765] [2020-10-13 10:56:27,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:27,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:56:27,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320280877] [2020-10-13 10:56:27,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:56:27,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:56:27,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:56:27,320 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 20 states. [2020-10-13 10:56:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:28,211 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2020-10-13 10:56:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:56:28,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2020-10-13 10:56:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:28,214 INFO L225 Difference]: With dead ends: 151 [2020-10-13 10:56:28,214 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 10:56:28,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:56:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 10:56:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-13 10:56:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:56:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-13 10:56:28,221 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2020-10-13 10:56:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:28,222 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-13 10:56:28,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:56:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-13 10:56:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 10:56:28,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:28,223 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:28,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:56:28,223 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -248054845, now seen corresponding path program 17 times [2020-10-13 10:56:28,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:28,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109972631] [2020-10-13 10:56:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:56:33,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:33,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:33,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:33,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:33,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:56:33,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 10:56:33,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109972631] [2020-10-13 10:56:33,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:33,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:56:33,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637193876] [2020-10-13 10:56:33,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:56:33,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:33,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:56:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:56:33,820 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-10-13 10:56:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:34,774 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-10-13 10:56:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:56:34,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2020-10-13 10:56:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:34,776 INFO L225 Difference]: With dead ends: 159 [2020-10-13 10:56:34,776 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:56:34,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:56:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:56:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-10-13 10:56:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:56:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-13 10:56:34,784 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2020-10-13 10:56:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:34,784 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-13 10:56:34,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:56:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-13 10:56:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 10:56:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:34,785 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:34,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:56:34,786 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2065999660, now seen corresponding path program 18 times [2020-10-13 10:56:34,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:34,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143104879] [2020-10-13 10:56:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:56:39,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:39,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:56:39,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:40,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:40,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:40,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:40,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:40,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:56:40,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:40,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:40,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:40,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:40,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 10:56:40,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143104879] [2020-10-13 10:56:40,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:40,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:56:40,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19948068] [2020-10-13 10:56:40,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:56:40,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:56:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:56:40,248 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 22 states. [2020-10-13 10:56:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:41,291 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2020-10-13 10:56:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:56:41,292 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-10-13 10:56:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:41,294 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:56:41,294 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:56:41,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:56:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:56:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-10-13 10:56:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:56:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-13 10:56:41,301 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2020-10-13 10:56:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:41,302 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-13 10:56:41,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:56:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-13 10:56:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 10:56:41,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:41,303 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:41,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:56:41,303 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash -248228833, now seen corresponding path program 19 times [2020-10-13 10:56:41,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:41,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926204028] [2020-10-13 10:56:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:41,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:47,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:47,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5703 [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:56:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:47,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:47,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 10:56:47,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926204028] [2020-10-13 10:56:47,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:47,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:56:47,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619102386] [2020-10-13 10:56:47,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:56:47,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:56:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:56:47,455 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 23 states. [2020-10-13 10:56:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:48,595 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2020-10-13 10:56:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:56:48,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-10-13 10:56:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:48,597 INFO L225 Difference]: With dead ends: 175 [2020-10-13 10:56:48,597 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 10:56:48,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:56:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 10:56:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-13 10:56:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:56:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-13 10:56:48,605 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 105 [2020-10-13 10:56:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:48,605 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-13 10:56:48,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:56:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-13 10:56:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 10:56:48,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:48,606 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:48,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:56:48,607 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1855729784, now seen corresponding path program 20 times [2020-10-13 10:56:48,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:48,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974494323] [2020-10-13 10:56:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:56:53,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5290 [2020-10-13 10:56:53,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:56:53,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:53,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:56:53,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:54,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:54,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:54,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:54,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:54,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:54,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:54,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 10:56:54,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974494323] [2020-10-13 10:56:54,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:54,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:56:54,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860342412] [2020-10-13 10:56:54,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:56:54,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:56:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:56:54,401 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 24 states. [2020-10-13 10:56:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:55,651 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2020-10-13 10:56:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:56:55,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2020-10-13 10:56:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:55,655 INFO L225 Difference]: With dead ends: 183 [2020-10-13 10:56:55,655 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:56:55,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:56:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:56:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2020-10-13 10:56:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 10:56:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-10-13 10:56:55,667 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 110 [2020-10-13 10:56:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:55,667 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-10-13 10:56:55,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:56:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-10-13 10:56:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 10:56:55,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:55,668 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:55,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:56:55,669 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1211777925, now seen corresponding path program 21 times [2020-10-13 10:56:55,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:55,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211486740] [2020-10-13 10:56:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:01,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5756 [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:57:01,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:02,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:02,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:02,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:02,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 10:57:02,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211486740] [2020-10-13 10:57:02,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:02,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:57:02,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379178177] [2020-10-13 10:57:02,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:57:02,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:57:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:57:02,021 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 25 states. [2020-10-13 10:57:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:03,379 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2020-10-13 10:57:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:57:03,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-10-13 10:57:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:03,381 INFO L225 Difference]: With dead ends: 191 [2020-10-13 10:57:03,381 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 10:57:03,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:57:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 10:57:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2020-10-13 10:57:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 10:57:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-13 10:57:03,390 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 115 [2020-10-13 10:57:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:03,390 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-13 10:57:03,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:57:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-13 10:57:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:57:03,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:03,392 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:03,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:57:03,392 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:03,392 INFO L82 PathProgramCache]: Analyzing trace with hash 605558812, now seen corresponding path program 22 times [2020-10-13 10:57:03,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:03,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375283245] [2020-10-13 10:57:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:08,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:08,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 10:57:08,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:08,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5231 [2020-10-13 10:57:08,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:57:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:57:08,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:09,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:09,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:09,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:09,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:09,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:09,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:09,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:09,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 10:57:09,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375283245] [2020-10-13 10:57:09,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:09,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:57:09,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977612010] [2020-10-13 10:57:09,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:57:09,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:57:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:57:09,192 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 26 states. [2020-10-13 10:57:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:10,656 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2020-10-13 10:57:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:57:10,657 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 120 [2020-10-13 10:57:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:10,658 INFO L225 Difference]: With dead ends: 199 [2020-10-13 10:57:10,658 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 10:57:10,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:57:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 10:57:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-10-13 10:57:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 10:57:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-10-13 10:57:10,673 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2020-10-13 10:57:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:10,674 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-10-13 10:57:10,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:57:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-10-13 10:57:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 10:57:10,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:10,676 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:10,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:57:10,677 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1093465303, now seen corresponding path program 23 times [2020-10-13 10:57:10,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:10,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562042964] [2020-10-13 10:57:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:15,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:15,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 10:57:15,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:15,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-13 10:57:15,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:15,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:57:15,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:15,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:57:15,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:16,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:16,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:16,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:57:16,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:16,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:16,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:16,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:16,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 10:57:16,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562042964] [2020-10-13 10:57:16,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:16,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:57:16,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298237117] [2020-10-13 10:57:16,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:57:16,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:57:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:57:16,485 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 27 states. [2020-10-13 10:57:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:18,085 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2020-10-13 10:57:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:57:18,086 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2020-10-13 10:57:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:18,087 INFO L225 Difference]: With dead ends: 207 [2020-10-13 10:57:18,087 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:57:18,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:57:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:57:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-13 10:57:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 10:57:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-10-13 10:57:18,096 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 125 [2020-10-13 10:57:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:18,096 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-10-13 10:57:18,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:57:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-10-13 10:57:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 10:57:18,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:18,097 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:18,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:57:18,098 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1949478976, now seen corresponding path program 24 times [2020-10-13 10:57:18,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:18,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613514066] [2020-10-13 10:57:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:23,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:23,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 10:57:23,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:23,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5212 [2020-10-13 10:57:23,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:57:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:57:23,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:23,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:23,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:23,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:23,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:23,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:23,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:57:23,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:23,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 10:57:23,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613514066] [2020-10-13 10:57:23,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:23,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:57:23,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700425443] [2020-10-13 10:57:23,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:57:23,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:57:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:57:23,980 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 28 states. [2020-10-13 10:57:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:25,732 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2020-10-13 10:57:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:57:25,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 130 [2020-10-13 10:57:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:25,734 INFO L225 Difference]: With dead ends: 215 [2020-10-13 10:57:25,734 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 10:57:25,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:57:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 10:57:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-10-13 10:57:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:57:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-10-13 10:57:25,743 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 130 [2020-10-13 10:57:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:25,743 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-10-13 10:57:25,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:57:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-10-13 10:57:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 10:57:25,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:25,745 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:25,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:57:25,745 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2066464051, now seen corresponding path program 25 times [2020-10-13 10:57:25,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:25,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657455827] [2020-10-13 10:57:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:33,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:33,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 10:57:33,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7777 [2020-10-13 10:57:33,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:57:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:57:33,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:34,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:34,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:34,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:34,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:57:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 10:57:34,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657455827] [2020-10-13 10:57:34,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:34,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:57:34,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029075754] [2020-10-13 10:57:34,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:57:34,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:57:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:57:34,215 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 29 states. [2020-10-13 10:57:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:36,090 INFO L93 Difference]: Finished difference Result 223 states and 226 transitions. [2020-10-13 10:57:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:57:36,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 135 [2020-10-13 10:57:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:36,092 INFO L225 Difference]: With dead ends: 223 [2020-10-13 10:57:36,092 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 10:57:36,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:57:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 10:57:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-10-13 10:57:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:57:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-13 10:57:36,099 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 135 [2020-10-13 10:57:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:36,100 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-13 10:57:36,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:57:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-13 10:57:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 10:57:36,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:36,101 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:36,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:57:36,101 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:36,102 INFO L82 PathProgramCache]: Analyzing trace with hash 750393188, now seen corresponding path program 26 times [2020-10-13 10:57:36,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:36,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081725402] [2020-10-13 10:57:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:41,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:41,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:57:41,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:41,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5627 [2020-10-13 10:57:41,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:41,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:57:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:57:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:42,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:42,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:42,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:42,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:42,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:42,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:42,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:42,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:42,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:42,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-13 10:57:42,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081725402] [2020-10-13 10:57:42,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:42,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:57:42,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297253277] [2020-10-13 10:57:42,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:57:42,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:57:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:57:42,495 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 30 states. [2020-10-13 10:57:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:44,541 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2020-10-13 10:57:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:57:44,542 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 140 [2020-10-13 10:57:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:44,544 INFO L225 Difference]: With dead ends: 231 [2020-10-13 10:57:44,544 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:57:44,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:57:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:57:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-13 10:57:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 10:57:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-10-13 10:57:44,549 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 140 [2020-10-13 10:57:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:44,550 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-10-13 10:57:44,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:57:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-10-13 10:57:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 10:57:44,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:44,551 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:44,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:57:44,551 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash 553899407, now seen corresponding path program 27 times [2020-10-13 10:57:44,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882753919] [2020-10-13 10:57:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:51,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:51,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 10:57:51,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:51,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7262 [2020-10-13 10:57:51,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:51,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:57:51,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:51,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:57:51,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:52,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:52,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:52,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 10:57:52,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882753919] [2020-10-13 10:57:52,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:52,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:57:52,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593147942] [2020-10-13 10:57:52,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:57:52,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:52,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:57:52,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:57:52,584 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 31 states. [2020-10-13 10:57:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:54,755 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2020-10-13 10:57:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:57:54,756 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 145 [2020-10-13 10:57:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:54,758 INFO L225 Difference]: With dead ends: 239 [2020-10-13 10:57:54,758 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 10:57:54,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:57:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 10:57:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-10-13 10:57:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:57:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-10-13 10:57:54,765 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 145 [2020-10-13 10:57:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:54,766 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-10-13 10:57:54,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:57:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-10-13 10:57:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 10:57:54,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:54,767 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:54,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:57:54,767 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:54,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1381805832, now seen corresponding path program 28 times [2020-10-13 10:57:54,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:54,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493583797] [2020-10-13 10:57:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:59,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 10:57:59,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:59,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 10:57:59,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:57:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:57:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:57:59,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:00,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 10:58:00,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493583797] [2020-10-13 10:58:00,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:00,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:58:00,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851268545] [2020-10-13 10:58:00,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:58:00,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:58:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:58:00,649 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 32 states. [2020-10-13 10:58:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:02,961 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2020-10-13 10:58:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:58:02,961 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 150 [2020-10-13 10:58:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:02,963 INFO L225 Difference]: With dead ends: 247 [2020-10-13 10:58:02,963 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 10:58:02,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:58:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 10:58:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2020-10-13 10:58:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 10:58:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2020-10-13 10:58:02,972 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 150 [2020-10-13 10:58:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:02,972 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2020-10-13 10:58:02,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:58:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2020-10-13 10:58:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 10:58:02,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:02,973 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:02,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:58:02,974 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1753809429, now seen corresponding path program 29 times [2020-10-13 10:58:02,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:02,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896348051] [2020-10-13 10:58:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:14,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:14,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11528 [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:58:14,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:15,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:15,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:15,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:15,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:58:15,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 10:58:15,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896348051] [2020-10-13 10:58:15,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:15,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:58:15,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851933089] [2020-10-13 10:58:15,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:58:15,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:58:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:58:15,381 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 33 states. [2020-10-13 10:58:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:17,851 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2020-10-13 10:58:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:58:17,852 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 155 [2020-10-13 10:58:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:17,854 INFO L225 Difference]: With dead ends: 255 [2020-10-13 10:58:17,854 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 10:58:17,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:58:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 10:58:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-13 10:58:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 10:58:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-10-13 10:58:17,862 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 155 [2020-10-13 10:58:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:17,862 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-10-13 10:58:17,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:58:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-10-13 10:58:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 10:58:17,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:17,864 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:17,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:58:17,864 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash 817059500, now seen corresponding path program 30 times [2020-10-13 10:58:17,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:17,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890088277] [2020-10-13 10:58:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:17,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:24,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:24,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 10:58:24,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:24,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6649 [2020-10-13 10:58:24,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:58:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:58:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:58:24,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:25,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:25,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:25,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:25,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:25,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:58:25,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-13 10:58:25,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890088277] [2020-10-13 10:58:25,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:25,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:58:25,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164100582] [2020-10-13 10:58:25,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:58:25,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:58:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:58:25,441 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 34 states. [2020-10-13 10:58:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:28,112 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2020-10-13 10:58:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:58:28,112 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 160 [2020-10-13 10:58:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:28,114 INFO L225 Difference]: With dead ends: 263 [2020-10-13 10:58:28,114 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 10:58:28,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:58:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 10:58:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-13 10:58:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 10:58:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2020-10-13 10:58:28,124 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2020-10-13 10:58:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:28,124 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2020-10-13 10:58:28,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:58:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2020-10-13 10:58:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 10:58:28,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:28,126 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:28,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:58:28,126 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash -926484921, now seen corresponding path program 31 times [2020-10-13 10:58:28,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:28,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61696323] [2020-10-13 10:58:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:35,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:35,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 10:58:35,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7032 [2020-10-13 10:58:35,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:58:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:58:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:58:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:36,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:36,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:36,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:36,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:36,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:58:36,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 10:58:36,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61696323] [2020-10-13 10:58:36,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:36,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:58:36,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016242083] [2020-10-13 10:58:36,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:58:36,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:58:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:58:36,141 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 35 states. [2020-10-13 10:58:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:39,003 INFO L93 Difference]: Finished difference Result 271 states and 274 transitions. [2020-10-13 10:58:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:58:39,003 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 165 [2020-10-13 10:58:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:39,005 INFO L225 Difference]: With dead ends: 271 [2020-10-13 10:58:39,005 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 10:58:39,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:58:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 10:58:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-13 10:58:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 10:58:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-10-13 10:58:39,014 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 165 [2020-10-13 10:58:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:39,014 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-10-13 10:58:39,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:58:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-10-13 10:58:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 10:58:39,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:39,016 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:39,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:58:39,016 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 138169936, now seen corresponding path program 32 times [2020-10-13 10:58:39,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:39,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145466206] [2020-10-13 10:58:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:46,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:46,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 10:58:46,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:46,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7216 [2020-10-13 10:58:46,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:58:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:58:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:58:46,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:47,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:47,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:47,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:47,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:47,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:58:47,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:47,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:47,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:47,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 10:58:47,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145466206] [2020-10-13 10:58:47,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:47,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:58:47,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465353080] [2020-10-13 10:58:47,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:58:47,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:58:47,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:58:47,256 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 36 states. [2020-10-13 10:58:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:50,266 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2020-10-13 10:58:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:58:50,266 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 170 [2020-10-13 10:58:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:50,268 INFO L225 Difference]: With dead ends: 279 [2020-10-13 10:58:50,268 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 10:58:50,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:58:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 10:58:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-10-13 10:58:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 10:58:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2020-10-13 10:58:50,281 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 170 [2020-10-13 10:58:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:50,282 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2020-10-13 10:58:50,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:58:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2020-10-13 10:58:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 10:58:50,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:50,283 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:50,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:58:50,283 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash 11894435, now seen corresponding path program 33 times [2020-10-13 10:58:50,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:50,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277426499] [2020-10-13 10:58:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:50,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:50,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:58,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:58,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 10:58:58,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:58,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7883 [2020-10-13 10:58:58,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:58:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:58:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:58:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:59,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:59,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:59,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:59,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:59,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:58:59,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 10:58:59,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277426499] [2020-10-13 10:58:59,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:59,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:58:59,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277589752] [2020-10-13 10:58:59,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:58:59,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:58:59,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:58:59,234 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 37 states. [2020-10-13 10:59:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:02,419 INFO L93 Difference]: Finished difference Result 287 states and 290 transitions. [2020-10-13 10:59:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:59:02,420 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 175 [2020-10-13 10:59:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:02,422 INFO L225 Difference]: With dead ends: 287 [2020-10-13 10:59:02,422 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 10:59:02,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:59:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 10:59:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-10-13 10:59:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 10:59:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-10-13 10:59:02,431 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 175 [2020-10-13 10:59:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:02,431 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-10-13 10:59:02,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:59:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-10-13 10:59:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 10:59:02,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:02,433 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:02,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:59:02,433 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1240847860, now seen corresponding path program 34 times [2020-10-13 10:59:02,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:02,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215594844] [2020-10-13 10:59:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:02,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking...