/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/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:15:45,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:15:45,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:15:45,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:15:45,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:15:45,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:15:45,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:15:45,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:15:45,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:15:45,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:15:45,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:15:45,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:15:45,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:15:45,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:15:45,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:15:45,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:15:45,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:15:45,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:15:45,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:15:45,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:15:45,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:15:45,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:15:45,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:15:45,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:15:45,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:15:45,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:15:45,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:15:45,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:15:45,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:15:45,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:15:45,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:15:45,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:15:45,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:15:45,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:15:45,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:15:45,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:15:45,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:15:45,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:15:45,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:15:45,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:15:45,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:15:45,371 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 10:15:45,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:15:45,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:15:45,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:15:45,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:15:45,431 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:15:45,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:15:45,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:15:45,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:15:45,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:15:45,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:15:45,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:15:45,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:15:45,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:15:45,433 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:15:45,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:15:45,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:15:45,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:15:45,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:15:45,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:15:45,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:15:45,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:15:45,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:15:45,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:15:45,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:15:45,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:15:45,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:15:45,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:15:45,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:15:45,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:15:45,437 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 10:15:45,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:15:45,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:15:45,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:15:45,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:15:45,841 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:15:45,842 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2020-10-13 10:15:45,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07656ef5f/a35dbf63a8b04153b479eec222fd7a6e/FLAG986e1a28a [2020-10-13 10:15:46,412 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:15:46,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2020-10-13 10:15:46,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07656ef5f/a35dbf63a8b04153b479eec222fd7a6e/FLAG986e1a28a [2020-10-13 10:15:46,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07656ef5f/a35dbf63a8b04153b479eec222fd7a6e [2020-10-13 10:15:46,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:15:46,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:15:46,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:46,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:15:46,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:15:46,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:46" (1/1) ... [2020-10-13 10:15:46,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156e2246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:46, skipping insertion in model container [2020-10-13 10:15:46,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:46" (1/1) ... [2020-10-13 10:15:46,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:15:46,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:15:47,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:47,050 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:15:47,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:47,082 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:15:47,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47 WrapperNode [2020-10-13 10:15:47,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:47,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:15:47,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:15:47,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:15:47,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... [2020-10-13 10:15:47,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:15:47,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:15:47,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:15:47,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:15:47,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:15:47,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:15:47,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:15:47,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:15:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:15:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:15:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:15:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:15:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:15:47,478 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:15:47,479 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 10:15:47,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:47 BoogieIcfgContainer [2020-10-13 10:15:47,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:15:47,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:15:47,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:15:47,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:15:47,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:15:46" (1/3) ... [2020-10-13 10:15:47,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1eaeab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:47, skipping insertion in model container [2020-10-13 10:15:47,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:47" (2/3) ... [2020-10-13 10:15:47,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1eaeab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:47, skipping insertion in model container [2020-10-13 10:15:47,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:47" (3/3) ... [2020-10-13 10:15:47,495 INFO L109 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2020-10-13 10:15:47,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:15:47,517 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:15:47,551 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:15:47,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:15:47,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:15:47,602 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:15:47,602 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:15:47,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:15:47,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:15:47,604 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:15:47,604 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:15:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-13 10:15:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:15:47,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:47,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:47,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -509317623, now seen corresponding path program 1 times [2020-10-13 10:15:47,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:47,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120096473] [2020-10-13 10:15:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:47,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:47,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:15:47,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:15:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 10:15:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:15:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:15:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:15:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:48,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:48,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:48,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:15:48,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:48,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:15:48,057 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 10:15:48,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120096473] [2020-10-13 10:15:48,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:48,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:15:48,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557449623] [2020-10-13 10:15:48,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:15:48,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:48,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:15:48,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:15:48,100 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-10-13 10:15:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:48,204 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-13 10:15:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:15:48,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:15:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:48,218 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:15:48,218 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:15:48,222 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 10:15:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:15:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:15:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:15:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-13 10:15:48,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-13 10:15:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:48,261 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-13 10:15:48,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:15:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-13 10:15:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:15:48,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:48,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:48,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:15:48,263 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash -472704980, now seen corresponding path program 1 times [2020-10-13 10:15:48,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:48,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472650054] [2020-10-13 10:15:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:48,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:15:48,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:15:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-13 10:15:48,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:15:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:15:48,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:15:48,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:48,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:48,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:48,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:15:48,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:48,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472650054] [2020-10-13 10:15:48,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:48,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:15:48,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561263635] [2020-10-13 10:15:48,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:48,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:48,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:48,558 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-13 10:15:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:48,634 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-10-13 10:15:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:15:48,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 10:15:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:48,637 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:15:48,637 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:15:48,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:15:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:15:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:15:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:15:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-13 10:15:48,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-10-13 10:15:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:48,645 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-13 10:15:48,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:15:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-13 10:15:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:15:48,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:48,647 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:48,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:15:48,647 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash 662286953, now seen corresponding path program 2 times [2020-10-13 10:15:48,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:48,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841715389] [2020-10-13 10:15:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:48,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:15:48,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:15:48,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 10:15:48,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:15:48,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:15:48,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:15:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:15:48,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:48,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:48,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:48,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:48,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:15:48,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:48,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:48,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:48,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:15:48,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841715389] [2020-10-13 10:15:48,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:48,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:15:48,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875469778] [2020-10-13 10:15:48,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:48,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:48,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:48,827 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-10-13 10:15:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:48,917 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-13 10:15:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:15:48,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:15:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:48,919 INFO L225 Difference]: With dead ends: 20 [2020-10-13 10:15:48,919 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:15:48,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:15:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:15:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:15:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:15:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-13 10:15:48,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-10-13 10:15:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:48,936 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-13 10:15:48,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:15:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-13 10:15:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:15:48,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:48,939 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:48,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:15:48,940 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash 677390990, now seen corresponding path program 1 times [2020-10-13 10:15:48,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:48,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575814221] [2020-10-13 10:15:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:48,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:15:49,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 10:15:49,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:15:49,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:49,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:15:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:15:49,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:49,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:49,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:49,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:49,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:49,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:49,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575814221] [2020-10-13 10:15:49,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:49,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:15:49,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851531561] [2020-10-13 10:15:49,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:15:49,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:15:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:15:49,111 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-13 10:15:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:49,216 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-13 10:15:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:15:49,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 10:15:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:49,218 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:15:49,218 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:15:49,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:15:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:15:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:15:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:15:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 10:15:49,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-13 10:15:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:49,224 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 10:15:49,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:15:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 10:15:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:15:49,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:49,225 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:49,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:15:49,226 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1502402545, now seen corresponding path program 2 times [2020-10-13 10:15:49,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:49,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918465293] [2020-10-13 10:15:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:15:49,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 10:15:49,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:15:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:15:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:49,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:49,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:49,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:49,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:49,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918465293] [2020-10-13 10:15:49,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:49,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:15:49,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113115506] [2020-10-13 10:15:49,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:15:49,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:15:49,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:15:49,324 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-10-13 10:15:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:49,411 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-13 10:15:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:15:49,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-13 10:15:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:49,413 INFO L225 Difference]: With dead ends: 25 [2020-10-13 10:15:49,413 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:15:49,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:15:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:15:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 10:15:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:15:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 10:15:49,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-13 10:15:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:49,419 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 10:15:49,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:15:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 10:15:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:15:49,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:49,420 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:49,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:15:49,421 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1307956974, now seen corresponding path program 3 times [2020-10-13 10:15:49,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:49,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68790233] [2020-10-13 10:15:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:15:49,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 10:15:49,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:15:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:15:49,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:49,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:49,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:49,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68790233] [2020-10-13 10:15:49,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:49,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:15:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52966552] [2020-10-13 10:15:49,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:15:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:15:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:15:49,531 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-10-13 10:15:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:49,636 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-13 10:15:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:15:49,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-13 10:15:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:49,638 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:15:49,638 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:15:49,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:15:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:15:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:15:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:15:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-13 10:15:49,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-13 10:15:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:49,644 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-13 10:15:49,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:15:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-13 10:15:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:15:49,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:49,646 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:49,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:15:49,646 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash -424888431, now seen corresponding path program 4 times [2020-10-13 10:15:49,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:49,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867062208] [2020-10-13 10:15:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:15:49,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 10:15:49,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:15:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:49,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:15:49,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:49,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:49,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:49,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:49,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867062208] [2020-10-13 10:15:49,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:49,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:15:49,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898842955] [2020-10-13 10:15:49,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:15:49,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:49,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:15:49,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:15:49,771 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2020-10-13 10:15:49,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:49,886 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-13 10:15:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:15:49,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-13 10:15:49,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:49,887 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:15:49,888 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:15:49,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:15:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:15:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:15:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:15:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 10:15:49,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-13 10:15:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:49,895 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 10:15:49,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:15:49,895 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 10:15:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:15:49,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:49,896 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:49,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:15:49,897 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1691478862, now seen corresponding path program 5 times [2020-10-13 10:15:49,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:49,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643236230] [2020-10-13 10:15:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:49,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:49,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:15:49,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:49,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 10:15:49,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:49,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:15:49,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:49,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:15:49,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:50,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:50,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:50,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:50,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:50,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:50,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:50,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:50,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643236230] [2020-10-13 10:15:50,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:50,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:15:50,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767089964] [2020-10-13 10:15:50,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:15:50,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:15:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:15:50,059 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-10-13 10:15:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:50,190 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-13 10:15:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:15:50,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-13 10:15:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:50,191 INFO L225 Difference]: With dead ends: 28 [2020-10-13 10:15:50,191 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:15:50,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:15:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:15:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:15:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:15:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 10:15:50,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-13 10:15:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:50,197 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 10:15:50,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:15:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 10:15:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:15:50,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:50,198 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:50,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:15:50,199 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1420611791, now seen corresponding path program 6 times [2020-10-13 10:15:50,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:50,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926902274] [2020-10-13 10:15:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:50,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:50,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:50,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:15:50,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:50,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 10:15:50,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:15:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:15:50,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:50,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:50,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:50,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:50,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:50,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:50,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:50,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:50,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:50,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:50,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:50,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926902274] [2020-10-13 10:15:50,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:50,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:15:50,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370702363] [2020-10-13 10:15:50,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:15:50,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:15:50,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:15:50,353 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-10-13 10:15:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:50,497 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-13 10:15:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:15:50,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-13 10:15:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:50,498 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:15:50,499 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:15:50,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:15:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:15:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:15:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:15:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 10:15:50,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-13 10:15:50,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:50,505 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 10:15:50,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:15:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 10:15:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:15:50,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:50,506 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:50,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:15:50,506 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:50,507 INFO L82 PathProgramCache]: Analyzing trace with hash 888825774, now seen corresponding path program 7 times [2020-10-13 10:15:50,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:50,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729442846] [2020-10-13 10:15:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:50,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:50,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:15:50,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:50,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-13 10:15:50,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:50,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:15:50,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:50,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:15:50,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:50,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:50,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:50,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:50,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:50,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:50,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:50,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:50,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729442846] [2020-10-13 10:15:50,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:50,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:15:50,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434446257] [2020-10-13 10:15:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:15:50,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:15:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:15:50,673 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2020-10-13 10:15:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:50,859 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-13 10:15:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:15:50,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-13 10:15:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:50,860 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:15:50,861 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:15:50,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:15:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:15:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:15:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:15:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 10:15:50,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-13 10:15:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:50,866 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 10:15:50,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:15:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 10:15:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:15:50,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:50,867 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:50,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:15:50,868 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -533053743, now seen corresponding path program 8 times [2020-10-13 10:15:50,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:50,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951110521] [2020-10-13 10:15:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:50,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:50,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:15:50,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:50,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 10:15:50,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:15:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:50,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:15:50,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:51,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:51,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:51,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:51,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:51,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:51,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:51,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:51,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:51,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:51,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:51,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:51,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951110521] [2020-10-13 10:15:51,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:51,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:15:51,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178048709] [2020-10-13 10:15:51,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:15:51,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:15:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:15:51,124 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2020-10-13 10:15:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:51,373 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-13 10:15:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:15:51,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-13 10:15:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:51,375 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:15:51,375 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:15:51,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:15:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:15:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:15:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:15:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 10:15:51,382 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-13 10:15:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:51,383 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 10:15:51,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:15:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 10:15:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:15:51,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:51,385 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:51,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:15:51,386 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1661645810, now seen corresponding path program 9 times [2020-10-13 10:15:51,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:51,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255550744] [2020-10-13 10:15:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:51,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:51,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:51,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:15:51,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:51,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 10:15:51,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:15:51,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:51,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:15:51,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:51,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:51,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:51,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:51,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:51,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:51,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:51,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:51,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255550744] [2020-10-13 10:15:51,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:51,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:15:51,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639052411] [2020-10-13 10:15:51,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:15:51,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:15:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:15:51,656 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2020-10-13 10:15:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:51,881 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 10:15:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:15:51,882 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-13 10:15:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:51,882 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:15:51,883 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:15:51,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:15:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:15:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 10:15:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:15:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 10:15:51,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-13 10:15:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:51,889 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 10:15:51,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:15:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 10:15:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:15:51,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:51,891 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:51,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:15:51,891 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2006705777, now seen corresponding path program 10 times [2020-10-13 10:15:51,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:51,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157815844] [2020-10-13 10:15:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:51,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:52,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:52,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:15:52,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:52,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 10:15:52,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:15:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:15:52,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:52,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:52,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:52,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:52,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:52,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:52,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:52,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:52,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157815844] [2020-10-13 10:15:52,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:52,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:15:52,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804804051] [2020-10-13 10:15:52,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:15:52,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:15:52,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:15:52,179 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 15 states. [2020-10-13 10:15:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:52,463 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-13 10:15:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:15:52,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-13 10:15:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:52,464 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:15:52,465 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:15:52,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:15:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:15:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:15:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:15:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 10:15:52,471 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-13 10:15:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:52,471 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 10:15:52,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:15:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 10:15:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:15:52,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:52,473 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:52,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:15:52,473 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash -238512018, now seen corresponding path program 11 times [2020-10-13 10:15:52,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:52,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680324980] [2020-10-13 10:15:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:52,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:52,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:15:52,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:52,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-13 10:15:52,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:52,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:15:52,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:52,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:15:52,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:52,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:52,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:52,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:52,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:52,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:52,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:52,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:52,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:52,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680324980] [2020-10-13 10:15:52,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:52,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:15:52,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105107675] [2020-10-13 10:15:52,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:15:52,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:15:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:15:52,823 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 16 states. [2020-10-13 10:15:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:53,116 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 10:15:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:15:53,116 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-13 10:15:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:53,117 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:15:53,117 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:15:53,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:15:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:15:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:15:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:15:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-13 10:15:53,123 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-13 10:15:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:53,124 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-13 10:15:53,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:15:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-13 10:15:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:15:53,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:53,125 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:15:53,126 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1120786927, now seen corresponding path program 12 times [2020-10-13 10:15:53,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:53,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449796841] [2020-10-13 10:15:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:53,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:53,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:53,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:15:53,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:53,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 10:15:53,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:15:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:15:53,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:53,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:53,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:53,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:53,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:53,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:53,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:53,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:53,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449796841] [2020-10-13 10:15:53,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:53,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:15:53,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476778122] [2020-10-13 10:15:53,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:15:53,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:15:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:15:53,483 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 17 states. [2020-10-13 10:15:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:53,813 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-13 10:15:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:15:53,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-13 10:15:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:53,815 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:15:53,815 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:15:53,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:15:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:15:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 10:15:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:15:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 10:15:53,828 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-13 10:15:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:53,829 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 10:15:53,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:15:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 10:15:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:15:53,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:53,832 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:53,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:15:53,833 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1593461966, now seen corresponding path program 13 times [2020-10-13 10:15:53,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:53,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889412605] [2020-10-13 10:15:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:53,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:54,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:54,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:15:54,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 10:15:54,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:15:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:15:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:54,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:54,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:54,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:54,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:54,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:54,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:54,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:54,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:54,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:54,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:54,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:54,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889412605] [2020-10-13 10:15:54,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:54,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:15:54,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549602802] [2020-10-13 10:15:54,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:15:54,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:15:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:15:54,251 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 18 states. [2020-10-13 10:15:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:54,594 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 10:15:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:15:54,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-13 10:15:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:54,595 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:15:54,596 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:15:54,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:15:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:15:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:15:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:15:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-13 10:15:54,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-13 10:15:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:54,602 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-13 10:15:54,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:15:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-13 10:15:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:15:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:54,604 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:54,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:15:54,604 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash -164168271, now seen corresponding path program 14 times [2020-10-13 10:15:54,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:54,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939176561] [2020-10-13 10:15:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:54,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:54,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:54,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:15:54,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:54,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-13 10:15:54,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:54,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:15:54,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:54,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:15:54,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:55,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:55,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:55,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:55,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:55,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:55,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:55,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939176561] [2020-10-13 10:15:55,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:55,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:15:55,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297091620] [2020-10-13 10:15:55,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:15:55,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:15:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:15:55,045 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 19 states. [2020-10-13 10:15:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:55,413 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-13 10:15:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:15:55,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-13 10:15:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:55,415 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:15:55,415 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:15:55,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:15:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:15:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 10:15:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:15:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-13 10:15:55,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-13 10:15:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:55,422 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-13 10:15:55,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:15:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-13 10:15:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:15:55,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:55,423 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:55,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:15:55,423 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1183869230, now seen corresponding path program 15 times [2020-10-13 10:15:55,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:55,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769520296] [2020-10-13 10:15:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:55,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:55,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:55,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:15:55,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:55,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-13 10:15:55,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:15:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:15:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:55,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:55,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:55,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:55,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:55,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:15:55,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:55,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:55,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:55,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769520296] [2020-10-13 10:15:55,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:55,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:15:55,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671616955] [2020-10-13 10:15:55,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:15:55,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:55,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:15:55,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:15:55,933 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 20 states. [2020-10-13 10:15:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:56,353 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 10:15:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:15:56,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-13 10:15:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:56,354 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:15:56,354 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:15:56,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:15:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:15:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:15:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:15:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 10:15:56,360 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-13 10:15:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:56,361 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 10:15:56,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:15:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 10:15:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:15:56,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:56,362 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:56,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:15:56,362 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash 23358801, now seen corresponding path program 16 times [2020-10-13 10:15:56,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:56,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827202084] [2020-10-13 10:15:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:56,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:56,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:15:56,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:56,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-13 10:15:56,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:56,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:15:56,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:56,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:15:56,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:56,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:56,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:56,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:56,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:56,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:56,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:56,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:56,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:56,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827202084] [2020-10-13 10:15:56,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:56,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:15:56,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979265275] [2020-10-13 10:15:56,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:15:56,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:15:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:15:56,820 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 21 states. [2020-10-13 10:15:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:57,222 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-13 10:15:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:15:57,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-13 10:15:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:57,223 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:15:57,223 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:15:57,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:15:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:15:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 10:15:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:15:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-13 10:15:57,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-13 10:15:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:57,232 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-13 10:15:57,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:15:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-13 10:15:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:15:57,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:57,233 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:57,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:15:57,234 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1592726130, now seen corresponding path program 17 times [2020-10-13 10:15:57,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:57,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880990255] [2020-10-13 10:15:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:57,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:57,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:15:57,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:57,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-13 10:15:57,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:15:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:15:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:57,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:57,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:57,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:57,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:57,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:57,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:57,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:57,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880990255] [2020-10-13 10:15:57,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:57,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:15:57,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405105426] [2020-10-13 10:15:57,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:15:57,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:15:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:15:57,765 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 22 states. [2020-10-13 10:15:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:58,189 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 10:15:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:15:58,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-13 10:15:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:58,190 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:15:58,190 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:15:58,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:15:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:15:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 10:15:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:15:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 10:15:58,199 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-13 10:15:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:58,199 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 10:15:58,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:15:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 10:15:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:15:58,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:58,201 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:58,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:15:58,201 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash -151751439, now seen corresponding path program 18 times [2020-10-13 10:15:58,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:58,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076744448] [2020-10-13 10:15:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:58,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:58,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:58,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:15:58,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:58,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-13 10:15:58,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:15:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:15:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:58,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:58,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:58,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:58,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:15:58,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:58,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:58,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076744448] [2020-10-13 10:15:58,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:58,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:15:58,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594179655] [2020-10-13 10:15:58,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:15:58,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:58,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:15:58,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:15:58,817 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 23 states. [2020-10-13 10:15:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:59,254 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-13 10:15:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:15:59,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-13 10:15:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:59,255 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:15:59,256 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:15:59,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:15:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:15:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 10:15:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:15:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 10:15:59,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-13 10:15:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:59,262 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 10:15:59,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:15:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 10:15:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:15:59,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:59,264 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:59,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:15:59,264 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1568791022, now seen corresponding path program 19 times [2020-10-13 10:15:59,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:59,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430629247] [2020-10-13 10:15:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:59,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:59,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:59,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:15:59,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-13 10:15:59,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:15:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:15:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:15:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:59,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:59,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:59,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:59,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:59,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:15:59,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:59,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430629247] [2020-10-13 10:15:59,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:59,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:15:59,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569368853] [2020-10-13 10:15:59,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:15:59,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:15:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:15:59,910 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 24 states. [2020-10-13 10:16:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:00,364 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-13 10:16:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:16:00,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-13 10:16:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:00,367 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:16:00,367 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:16:00,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:16:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:16:00,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:16:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:16:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-13 10:16:00,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-13 10:16:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:00,380 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-13 10:16:00,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:16:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-13 10:16:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:16:00,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:00,381 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:00,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:16:00,382 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash -928967535, now seen corresponding path program 20 times [2020-10-13 10:16:00,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:00,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820280777] [2020-10-13 10:16:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:00,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:00,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:16:00,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:00,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-13 10:16:00,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:16:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:16:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:01,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:01,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:01,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:01,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:01,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:01,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:01,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:01,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820280777] [2020-10-13 10:16:01,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:01,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:16:01,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390210067] [2020-10-13 10:16:01,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:16:01,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:16:01,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:16:01,094 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 25 states. [2020-10-13 10:16:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:01,620 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-13 10:16:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:16:01,621 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-13 10:16:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:01,622 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:16:01,622 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:16:01,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:16:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:16:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 10:16:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:16:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 10:16:01,629 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-13 10:16:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:01,630 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 10:16:01,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:16:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 10:16:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:16:01,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:01,632 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:01,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:16:01,632 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1050071474, now seen corresponding path program 21 times [2020-10-13 10:16:01,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:01,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378283868] [2020-10-13 10:16:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:01,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:01,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:01,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:16:01,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:01,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-13 10:16:01,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:16:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:16:01,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:02,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:02,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:02,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:02,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:02,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:02,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:02,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:02,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:02,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:02,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:02,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:02,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378283868] [2020-10-13 10:16:02,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:02,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:16:02,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703834247] [2020-10-13 10:16:02,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:16:02,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:02,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:16:02,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:16:02,421 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 26 states. [2020-10-13 10:16:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:03,074 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-13 10:16:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:16:03,074 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-13 10:16:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:03,075 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:16:03,075 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:16:03,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:16:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:16:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 10:16:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:16:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 10:16:03,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-13 10:16:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:03,082 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 10:16:03,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:16:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 10:16:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:16:03,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:03,083 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:03,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:16:03,084 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:03,084 INFO L82 PathProgramCache]: Analyzing trace with hash -509326287, now seen corresponding path program 22 times [2020-10-13 10:16:03,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:03,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930123687] [2020-10-13 10:16:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:03,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:16:03,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-13 10:16:03,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:16:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:16:03,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:03,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:03,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:03,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:03,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:03,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:03,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:03,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930123687] [2020-10-13 10:16:03,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:03,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:16:03,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724842372] [2020-10-13 10:16:03,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:16:03,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:16:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:16:03,877 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 27 states. [2020-10-13 10:16:04,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:04,479 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-13 10:16:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:16:04,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-13 10:16:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:04,481 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:16:04,481 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:16:04,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:16:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:16:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 10:16:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:16:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 10:16:04,491 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-13 10:16:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:04,491 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 10:16:04,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:16:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 10:16:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:16:04,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:04,503 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:04,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:16:04,503 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:04,504 INFO L82 PathProgramCache]: Analyzing trace with hash -926094674, now seen corresponding path program 23 times [2020-10-13 10:16:04,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:04,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688119896] [2020-10-13 10:16:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:04,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:04,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:04,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:16:04,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:04,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-13 10:16:04,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:16:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:16:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:05,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:05,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:05,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:05,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:05,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:05,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:05,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:05,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688119896] [2020-10-13 10:16:05,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:05,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:16:05,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767349258] [2020-10-13 10:16:05,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:16:05,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:16:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:16:05,295 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 28 states. [2020-10-13 10:16:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:05,930 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-13 10:16:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:16:05,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-13 10:16:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:05,931 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:16:05,931 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:16:05,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:16:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:16:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:16:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:16:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-13 10:16:05,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-13 10:16:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:05,942 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-13 10:16:05,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:16:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-13 10:16:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:16:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:05,943 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:05,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:16:05,943 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -961012783, now seen corresponding path program 24 times [2020-10-13 10:16:05,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:05,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958695731] [2020-10-13 10:16:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:06,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:06,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:16:06,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:06,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-13 10:16:06,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:16:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:16:06,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:06,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:06,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:06,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:06,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:06,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:06,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:06,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:06,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958695731] [2020-10-13 10:16:06,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:06,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:16:06,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450337833] [2020-10-13 10:16:06,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:16:06,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:16:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:16:06,806 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2020-10-13 10:16:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:07,614 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-13 10:16:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:16:07,614 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-13 10:16:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:07,615 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:16:07,615 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:16:07,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:16:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:16:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 10:16:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:16:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 10:16:07,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-13 10:16:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:07,626 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 10:16:07,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:16:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 10:16:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:16:07,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:07,627 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:07,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:16:07,627 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2043474162, now seen corresponding path program 25 times [2020-10-13 10:16:07,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:07,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5620228] [2020-10-13 10:16:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:07,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:08,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:08,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:16:08,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:08,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-13 10:16:08,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:16:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:08,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:16:08,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:08,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:08,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:08,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:08,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:08,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:08,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5620228] [2020-10-13 10:16:08,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:08,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:16:08,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461002488] [2020-10-13 10:16:08,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:16:08,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:16:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:16:08,519 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 30 states. [2020-10-13 10:16:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:09,328 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 10:16:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:16:09,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-13 10:16:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:09,329 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:16:09,329 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:16:09,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:16:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:16:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:16:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:16:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 10:16:09,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-13 10:16:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:09,343 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 10:16:09,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:16:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 10:16:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:16:09,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:09,347 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:09,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:16:09,348 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1240038543, now seen corresponding path program 26 times [2020-10-13 10:16:09,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:09,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844311913] [2020-10-13 10:16:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:09,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:09,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:09,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:16:09,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:09,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-13 10:16:09,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:16:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:16:09,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:10,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:10,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:10,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:10,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:10,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:10,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844311913] [2020-10-13 10:16:10,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:10,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:16:10,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227177262] [2020-10-13 10:16:10,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:16:10,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:16:10,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:16:10,270 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 31 states. [2020-10-13 10:16:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:11,069 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-13 10:16:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:16:11,070 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-13 10:16:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:11,071 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:16:11,071 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:16:11,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:16:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:16:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 10:16:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:16:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 10:16:11,078 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-13 10:16:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:11,079 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 10:16:11,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:16:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 10:16:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:16:11,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:11,079 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:11,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:16:11,080 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2103338130, now seen corresponding path program 27 times [2020-10-13 10:16:11,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:11,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116485747] [2020-10-13 10:16:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:11,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:11,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:16:11,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:11,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-13 10:16:11,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:11,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:16:11,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:11,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:16:11,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:12,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:12,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:12,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:12,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:12,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:12,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:12,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:12,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:12,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116485747] [2020-10-13 10:16:12,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:12,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:16:12,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197482654] [2020-10-13 10:16:12,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:16:12,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:12,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:16:12,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:16:12,081 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 32 states. [2020-10-13 10:16:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:12,878 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 10:16:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:16:12,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-13 10:16:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:12,880 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:16:12,880 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:16:12,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:16:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:16:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:16:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:16:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 10:16:12,887 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-13 10:16:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:12,888 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 10:16:12,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:16:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 10:16:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:16:12,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:12,888 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:12,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:16:12,889 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1199145745, now seen corresponding path program 28 times [2020-10-13 10:16:12,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:12,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104114156] [2020-10-13 10:16:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:13,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:13,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:16:13,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-13 10:16:13,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:16:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:16:13,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:13,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:13,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:13,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:13,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:13,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:13,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:13,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:13,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:13,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:13,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:13,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:13,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104114156] [2020-10-13 10:16:13,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:13,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:16:13,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363406128] [2020-10-13 10:16:13,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:16:13,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:13,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:16:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:16:13,843 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 33 states. [2020-10-13 10:16:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:14,750 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-13 10:16:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:16:14,751 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-13 10:16:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:14,752 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:16:14,752 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:16:14,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:16:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:16:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:16:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:16:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-13 10:16:14,758 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-13 10:16:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:14,759 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-13 10:16:14,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:16:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-13 10:16:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:16:14,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:14,760 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:14,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:16:14,760 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash 496930766, now seen corresponding path program 29 times [2020-10-13 10:16:14,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:14,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499142279] [2020-10-13 10:16:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:14,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:15,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:15,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:16:15,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-13 10:16:15,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:16:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:16:15,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:15,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:15,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:15,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:15,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:15,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499142279] [2020-10-13 10:16:15,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:15,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:16:15,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766618847] [2020-10-13 10:16:15,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:16:15,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:16:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:16:15,783 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 34 states. [2020-10-13 10:16:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:16,741 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 10:16:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:16:16,742 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-13 10:16:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:16,743 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:16:16,743 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:16:16,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:16:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:16:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 10:16:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:16:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 10:16:16,749 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-13 10:16:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:16,750 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 10:16:16,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:16:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 10:16:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:16:16,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:16,751 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:16,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:16:16,751 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:16,752 INFO L82 PathProgramCache]: Analyzing trace with hash 203102897, now seen corresponding path program 30 times [2020-10-13 10:16:16,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:16,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255049891] [2020-10-13 10:16:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:17,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:17,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:16:17,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:17,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-13 10:16:17,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:16:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:16:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:17,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:17,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:17,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:17,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:17,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:17,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:17,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:17,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:17,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:17,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:17,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255049891] [2020-10-13 10:16:17,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:17,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:16:17,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962277456] [2020-10-13 10:16:17,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:16:17,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:17,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:16:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:16:17,883 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 35 states. [2020-10-13 10:16:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:18,886 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-13 10:16:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:16:18,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-13 10:16:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:18,887 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:16:18,888 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:16:18,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:16:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:16:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:16:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:16:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 10:16:18,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-13 10:16:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:18,896 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 10:16:18,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:16:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 10:16:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:16:18,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:18,897 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:18,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:16:18,898 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash -315626450, now seen corresponding path program 31 times [2020-10-13 10:16:18,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:18,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656817996] [2020-10-13 10:16:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:18,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:19,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:19,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:16:19,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-13 10:16:19,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:16:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:19,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:16:19,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:20,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:20,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:20,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:20,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:20,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:20,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:20,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:20,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:20,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:20,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:20,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:20,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656817996] [2020-10-13 10:16:20,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:20,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:16:20,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733321862] [2020-10-13 10:16:20,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:16:20,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:16:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:16:20,074 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 36 states. [2020-10-13 10:16:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:21,111 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 10:16:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:16:21,112 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-13 10:16:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:21,113 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:16:21,113 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:16:21,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:16:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:16:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:16:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:16:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 10:16:21,120 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-13 10:16:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:21,120 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 10:16:21,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:16:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 10:16:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:16:21,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:21,121 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:21,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:16:21,121 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash 783632977, now seen corresponding path program 32 times [2020-10-13 10:16:21,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:21,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497794255] [2020-10-13 10:16:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:21,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:21,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:21,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:16:21,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:21,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-13 10:16:21,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:16:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:16:21,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:22,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:22,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:22,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:22,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:16:22,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:22,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497794255] [2020-10-13 10:16:22,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:22,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:16:22,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677533342] [2020-10-13 10:16:22,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:16:22,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:16:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:16:22,295 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 37 states. [2020-10-13 10:16:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:23,385 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-13 10:16:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:16:23,386 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-13 10:16:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:23,387 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:16:23,387 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:16:23,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:16:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:16:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 10:16:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:16:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 10:16:23,393 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-13 10:16:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:23,394 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 10:16:23,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:16:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 10:16:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:16:23,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:23,394 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:23,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:16:23,395 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:23,395 INFO L82 PathProgramCache]: Analyzing trace with hash 500936846, now seen corresponding path program 33 times [2020-10-13 10:16:23,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:23,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670189698] [2020-10-13 10:16:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:23,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:23,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:16:23,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:23,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-13 10:16:23,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:16:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:16:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:24,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:24,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:24,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:24,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:24,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:24,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:24,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:24,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670189698] [2020-10-13 10:16:24,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:24,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:16:24,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027728698] [2020-10-13 10:16:24,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:16:24,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:16:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:16:24,772 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 38 states. [2020-10-13 10:16:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:25,921 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 10:16:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:16:25,921 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-13 10:16:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:25,922 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:16:25,922 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:16:25,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:16:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:16:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 10:16:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:16:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 10:16:25,929 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-13 10:16:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:25,929 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 10:16:25,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:16:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 10:16:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:16:25,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:25,932 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:25,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:16:25,932 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash 327291377, now seen corresponding path program 34 times [2020-10-13 10:16:25,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:25,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289377511] [2020-10-13 10:16:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:25,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:26,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:16:26,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:26,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-13 10:16:26,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:16:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:16:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:27,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:27,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:27,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:27,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:27,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:27,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:27,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:27,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289377511] [2020-10-13 10:16:27,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:27,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:16:27,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799772057] [2020-10-13 10:16:27,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:16:27,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:27,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:16:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:16:27,214 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 39 states. [2020-10-13 10:16:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:28,319 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-13 10:16:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:16:28,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-13 10:16:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:28,321 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:16:28,321 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:16:28,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:16:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:16:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 10:16:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:16:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 10:16:28,328 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-13 10:16:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:28,329 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 10:16:28,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:16:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 10:16:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:16:28,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:28,330 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:28,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:16:28,330 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -760750866, now seen corresponding path program 35 times [2020-10-13 10:16:28,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:28,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325149432] [2020-10-13 10:16:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:28,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:28,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:28,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:16:28,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:28,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-13 10:16:28,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:16:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:16:28,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:29,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:29,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:29,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:29,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:29,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:29,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:29,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325149432] [2020-10-13 10:16:29,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:29,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:16:29,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194980816] [2020-10-13 10:16:29,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:16:29,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:29,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:16:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:16:29,707 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 40 states. [2020-10-13 10:16:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:30,859 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-13 10:16:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:16:30,860 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-13 10:16:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:30,861 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:16:30,861 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:16:30,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 10:16:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:16:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:16:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:16:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-13 10:16:30,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-13 10:16:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:30,871 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-13 10:16:30,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:16:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-13 10:16:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:16:30,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:30,872 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:30,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:16:30,872 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:30,873 INFO L82 PathProgramCache]: Analyzing trace with hash -130322031, now seen corresponding path program 36 times [2020-10-13 10:16:30,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:30,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132330129] [2020-10-13 10:16:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:30,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:31,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:31,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:16:31,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:31,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-13 10:16:31,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:16:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:16:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:32,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:32,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:32,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:32,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:32,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132330129] [2020-10-13 10:16:32,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:32,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:16:32,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640798445] [2020-10-13 10:16:32,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:16:32,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:16:32,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:16:32,238 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 41 states. [2020-10-13 10:16:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:33,412 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-13 10:16:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:16:33,413 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-13 10:16:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:33,414 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:16:33,414 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:16:33,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 10:16:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:16:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 10:16:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:16:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 10:16:33,419 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-13 10:16:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:33,420 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 10:16:33,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:16:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 10:16:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:16:33,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:33,420 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:33,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:16:33,421 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2061864626, now seen corresponding path program 37 times [2020-10-13 10:16:33,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:33,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338881716] [2020-10-13 10:16:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:33,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:33,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:16:33,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:34,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:34,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:34,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338881716] [2020-10-13 10:16:34,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:34,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:16:34,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406336057] [2020-10-13 10:16:34,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:16:34,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:16:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:16:34,768 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 42 states. [2020-10-13 10:16:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:36,030 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 10:16:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:16:36,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-13 10:16:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:36,032 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:16:36,032 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:16:36,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 10:16:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:16:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 10:16:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:16:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-13 10:16:36,043 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-13 10:16:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:36,043 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-13 10:16:36,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:16:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-13 10:16:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:16:36,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:36,044 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:36,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:16:36,045 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1810142927, now seen corresponding path program 38 times [2020-10-13 10:16:36,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:36,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685006211] [2020-10-13 10:16:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:36,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:36,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:16:36,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-13 10:16:36,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:16:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:16:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:37,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:37,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:37,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:37,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:37,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:37,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685006211] [2020-10-13 10:16:37,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:37,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:16:37,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647656145] [2020-10-13 10:16:37,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:16:37,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:37,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:16:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:16:37,516 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 43 states. [2020-10-13 10:16:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:38,903 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 10:16:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:16:38,904 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-13 10:16:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:38,905 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:16:38,905 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:16:38,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 10:16:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:16:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 10:16:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:16:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 10:16:38,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-13 10:16:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:38,912 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 10:16:38,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:16:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 10:16:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:16:38,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:38,914 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:38,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:16:38,914 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1698262446, now seen corresponding path program 39 times [2020-10-13 10:16:38,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:38,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484372875] [2020-10-13 10:16:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:38,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:39,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:16:39,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-13 10:16:39,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:16:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:16:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:40,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:40,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:40,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:40,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:40,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:40,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:40,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484372875] [2020-10-13 10:16:40,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:40,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:16:40,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753646432] [2020-10-13 10:16:40,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:16:40,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:40,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:16:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:16:40,573 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 44 states. [2020-10-13 10:16:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:42,146 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-13 10:16:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:16:42,147 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-13 10:16:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:42,148 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:16:42,148 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:16:42,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 10:16:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:16:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:16:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:16:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 10:16:42,154 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-13 10:16:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:42,154 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 10:16:42,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:16:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 10:16:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:16:42,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:42,155 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:42,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:16:42,155 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:42,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:42,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1210320687, now seen corresponding path program 40 times [2020-10-13 10:16:42,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:42,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665453690] [2020-10-13 10:16:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:42,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:42,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:16:42,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-13 10:16:42,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:16:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:16:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:43,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:43,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:43,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:43,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:43,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665453690] [2020-10-13 10:16:43,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:43,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:16:43,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049354109] [2020-10-13 10:16:43,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:16:43,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:16:43,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:16:43,802 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 45 states. [2020-10-13 10:16:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:45,431 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-13 10:16:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:16:45,432 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-13 10:16:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:45,433 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:16:45,433 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:16:45,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 10:16:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:16:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 10:16:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:16:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 10:16:45,440 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-13 10:16:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:45,441 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 10:16:45,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:16:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 10:16:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:16:45,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:45,442 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:45,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:16:45,442 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:45,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1182084594, now seen corresponding path program 41 times [2020-10-13 10:16:45,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:45,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078038466] [2020-10-13 10:16:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:45,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:45,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:45,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:16:45,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:45,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-13 10:16:45,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:16:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:16:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:47,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:47,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:47,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:47,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:47,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:47,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:47,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:47,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:47,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:47,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:47,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:47,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078038466] [2020-10-13 10:16:47,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:47,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:16:47,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460591335] [2020-10-13 10:16:47,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:16:47,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:16:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:16:47,154 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 46 states. [2020-10-13 10:16:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:48,765 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 10:16:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:16:48,765 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-13 10:16:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:48,767 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:16:48,767 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:16:48,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-13 10:16:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:16:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 10:16:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:16:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 10:16:48,772 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-13 10:16:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:48,772 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 10:16:48,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:16:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 10:16:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:16:48,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:48,773 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:48,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:16:48,774 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -306765711, now seen corresponding path program 42 times [2020-10-13 10:16:48,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:48,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526508365] [2020-10-13 10:16:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:48,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:49,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:49,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:16:49,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:49,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-13 10:16:49,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:16:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:16:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:50,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:50,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:50,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:50,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:50,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:50,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:50,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:50,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526508365] [2020-10-13 10:16:50,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:50,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:16:50,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116249980] [2020-10-13 10:16:50,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:16:50,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:50,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:16:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:16:50,704 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 47 states. [2020-10-13 10:16:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:52,287 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-13 10:16:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:16:52,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-13 10:16:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:52,289 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:16:52,289 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:16:52,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-13 10:16:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:16:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 10:16:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:16:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 10:16:52,296 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-13 10:16:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:52,297 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 10:16:52,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:16:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 10:16:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:16:52,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:52,298 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:52,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:16:52,298 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1058315886, now seen corresponding path program 43 times [2020-10-13 10:16:52,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:52,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5068755] [2020-10-13 10:16:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:52,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:52,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:16:52,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:52,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-13 10:16:52,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:16:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:16:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:54,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:54,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:54,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:54,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:54,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:54,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:54,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:54,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:54,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:54,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:54,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5068755] [2020-10-13 10:16:54,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:54,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:16:54,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320631830] [2020-10-13 10:16:54,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:16:54,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:16:54,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:16:54,290 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 48 states. [2020-10-13 10:16:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:56,162 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 10:16:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:16:56,163 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-13 10:16:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:56,165 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:16:56,165 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:16:56,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-13 10:16:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:16:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 10:16:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:16:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-13 10:16:56,171 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-13 10:16:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:56,171 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-13 10:16:56,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:16:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-13 10:16:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:16:56,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:56,174 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:56,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:16:56,174 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:56,175 INFO L82 PathProgramCache]: Analyzing trace with hash 426172433, now seen corresponding path program 44 times [2020-10-13 10:16:56,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:56,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316759194] [2020-10-13 10:16:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:56,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:56,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:16:56,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:56,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-13 10:16:56,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:56,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:16:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:16:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:58,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:58,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:58,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:58,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:58,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:16:58,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:58,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316759194] [2020-10-13 10:16:58,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:58,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:16:58,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391779235] [2020-10-13 10:16:58,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:16:58,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:16:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:16:58,246 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 49 states. [2020-10-13 10:17:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:00,161 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-13 10:17:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:17:00,162 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-13 10:17:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:00,163 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:17:00,163 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:17:00,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-13 10:17:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:17:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 10:17:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:17:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 10:17:00,171 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-13 10:17:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:00,171 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 10:17:00,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:17:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 10:17:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:17:00,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:00,172 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:00,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:17:00,172 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1990405426, now seen corresponding path program 45 times [2020-10-13 10:17:00,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:00,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530516947] [2020-10-13 10:17:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:00,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:17:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:02,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:02,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:02,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:02,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:02,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:02,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:02,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:02,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:02,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:02,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:02,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530516947] [2020-10-13 10:17:02,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:02,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:17:02,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191452702] [2020-10-13 10:17:02,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:17:02,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:17:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:17:02,268 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 50 states. [2020-10-13 10:17:04,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:04,245 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 10:17:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:17:04,245 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-13 10:17:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:04,247 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:17:04,247 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:17:04,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-13 10:17:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:17:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 10:17:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:17:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 10:17:04,253 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-13 10:17:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:04,254 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 10:17:04,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:17:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 10:17:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:17:04,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:04,254 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:04,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:17:04,255 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash 405092273, now seen corresponding path program 46 times [2020-10-13 10:17:04,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:04,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170001708] [2020-10-13 10:17:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:04,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:04,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:04,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:17:04,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:04,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-13 10:17:04,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:17:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:17:04,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:06,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:06,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:06,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:06,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:06,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:06,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:06,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:06,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:06,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:06,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170001708] [2020-10-13 10:17:06,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:06,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:17:06,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967625760] [2020-10-13 10:17:06,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:17:06,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:17:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:17:06,470 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 51 states. [2020-10-13 10:17:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:08,608 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-13 10:17:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:17:08,609 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-13 10:17:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:08,610 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:17:08,610 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:17:08,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-13 10:17:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:17:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-13 10:17:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:17:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 10:17:08,616 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-13 10:17:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:08,617 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 10:17:08,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:17:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 10:17:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:17:08,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:08,618 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:08,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:17:08,618 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1651076910, now seen corresponding path program 47 times [2020-10-13 10:17:08,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:08,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400624844] [2020-10-13 10:17:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:09,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:09,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:17:09,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:09,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-13 10:17:09,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:17:09,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:09,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:17:09,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:10,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:10,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:10,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:10,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:10,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:10,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:10,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400624844] [2020-10-13 10:17:10,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:10,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:17:10,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975997745] [2020-10-13 10:17:10,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:17:10,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:10,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:17:10,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:17:10,961 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 52 states. [2020-10-13 10:17:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:13,070 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 10:17:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:17:13,070 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-13 10:17:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:13,071 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:17:13,071 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:17:13,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-13 10:17:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:17:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 10:17:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:17:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-13 10:17:13,077 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-13 10:17:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:13,077 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-13 10:17:13,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:17:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-13 10:17:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:17:13,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:13,078 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:13,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:17:13,078 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1621894993, now seen corresponding path program 48 times [2020-10-13 10:17:13,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:13,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791829140] [2020-10-13 10:17:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:13,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:13,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:17:13,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-13 10:17:13,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:17:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:17:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:15,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:15,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:15,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791829140] [2020-10-13 10:17:15,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:15,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 10:17:15,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017789444] [2020-10-13 10:17:15,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 10:17:15,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 10:17:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:17:15,520 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 53 states. [2020-10-13 10:17:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:17,815 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-13 10:17:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 10:17:17,816 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 61 [2020-10-13 10:17:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:17,818 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:17:17,818 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:17:17,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-13 10:17:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:17:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 10:17:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:17:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 10:17:17,822 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2020-10-13 10:17:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:17,823 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 10:17:17,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 10:17:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 10:17:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:17:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:17,826 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:17,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:17:17,826 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 717255566, now seen corresponding path program 49 times [2020-10-13 10:17:17,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:17,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504897397] [2020-10-13 10:17:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:17,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:18,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:18,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:17:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:20,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:20,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:20,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:20,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:20,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:17:20,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:20,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:20,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:20,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:20,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:20,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504897397] [2020-10-13 10:17:20,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:20,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 10:17:20,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149475688] [2020-10-13 10:17:20,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 10:17:20,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 10:17:20,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:17:20,088 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 54 states. [2020-10-13 10:17:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:22,167 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 10:17:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 10:17:22,168 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 62 [2020-10-13 10:17:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:22,169 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:17:22,169 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:17:22,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-13 10:17:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:17:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 10:17:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:17:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-13 10:17:22,175 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-13 10:17:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:22,176 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-13 10:17:22,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 10:17:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-13 10:17:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:17:22,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:22,177 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:22,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:17:22,177 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:22,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1556762895, now seen corresponding path program 50 times [2020-10-13 10:17:22,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:22,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030601990] [2020-10-13 10:17:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:22,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:22,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:22,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:17:22,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:22,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-13 10:17:22,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 10:17:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:17:22,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:24,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:24,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030601990] [2020-10-13 10:17:24,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:24,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 10:17:24,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95421260] [2020-10-13 10:17:24,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 10:17:24,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 10:17:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:17:24,524 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 55 states. [2020-10-13 10:17:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:26,841 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-13 10:17:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:17:26,842 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 63 [2020-10-13 10:17:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:26,843 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:17:26,844 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:17:26,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-13 10:17:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:17:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 10:17:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:17:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-13 10:17:26,850 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2020-10-13 10:17:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:26,850 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-13 10:17:26,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 10:17:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-13 10:17:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:17:26,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:26,851 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:26,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:17:26,851 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 963108846, now seen corresponding path program 51 times [2020-10-13 10:17:26,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:26,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273902817] [2020-10-13 10:17:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:26,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:27,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:27,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:17:27,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-13 10:17:27,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 10:17:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:17:27,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:29,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:29,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:29,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:29,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:29,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:29,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:29,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:29,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:29,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:29,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:29,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273902817] [2020-10-13 10:17:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 10:17:29,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532360464] [2020-10-13 10:17:29,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 10:17:29,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 10:17:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:17:29,238 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 56 states. [2020-10-13 10:17:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:31,656 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-13 10:17:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:17:31,659 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2020-10-13 10:17:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:31,660 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:17:31,660 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:17:31,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-13 10:17:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:17:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 10:17:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:17:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 10:17:31,666 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-13 10:17:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:31,666 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 10:17:31,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 10:17:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 10:17:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:17:31,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:31,668 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:31,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:17:31,668 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1769721489, now seen corresponding path program 52 times [2020-10-13 10:17:31,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:31,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915137180] [2020-10-13 10:17:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:31,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:32,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:32,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:17:32,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:32,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-13 10:17:32,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:32,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:17:32,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:32,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:17:32,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:34,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:34,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:34,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:34,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:34,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:34,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:34,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:34,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915137180] [2020-10-13 10:17:34,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:34,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 10:17:34,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669859768] [2020-10-13 10:17:34,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 10:17:34,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:34,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 10:17:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:17:34,213 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 57 states. [2020-10-13 10:17:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:36,520 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-13 10:17:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 10:17:36,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 65 [2020-10-13 10:17:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:36,521 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:17:36,522 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:17:36,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-13 10:17:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:17:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 10:17:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:17:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-13 10:17:36,527 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-13 10:17:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:36,528 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-13 10:17:36,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 10:17:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-13 10:17:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:17:36,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:36,529 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:36,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:17:36,529 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1004909646, now seen corresponding path program 53 times [2020-10-13 10:17:36,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:36,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35306504] [2020-10-13 10:17:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:36,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:37,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:37,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:17:37,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-13 10:17:37,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 10:17:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:17:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:39,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:39,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:39,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:39,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:39,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:39,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:39,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:39,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35306504] [2020-10-13 10:17:39,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:39,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 10:17:39,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905136985] [2020-10-13 10:17:39,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 10:17:39,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 10:17:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:17:39,156 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 58 states. [2020-10-13 10:17:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:41,755 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-13 10:17:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 10:17:41,756 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 66 [2020-10-13 10:17:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:41,757 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:17:41,757 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:17:41,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-13 10:17:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:17:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 10:17:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:17:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-13 10:17:41,762 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-13 10:17:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:41,763 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-13 10:17:41,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 10:17:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-13 10:17:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:17:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:41,764 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:41,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:17:41,764 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1229421007, now seen corresponding path program 54 times [2020-10-13 10:17:41,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:41,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913083989] [2020-10-13 10:17:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:41,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:42,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:42,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:17:42,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:42,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-13 10:17:42,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 10:17:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:17:42,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:44,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:44,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:44,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:44,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:44,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:44,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:44,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:44,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:44,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913083989] [2020-10-13 10:17:44,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:44,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 10:17:44,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780393540] [2020-10-13 10:17:44,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 10:17:44,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 10:17:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:17:44,512 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 59 states. [2020-10-13 10:17:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:47,245 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-13 10:17:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 10:17:47,246 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 67 [2020-10-13 10:17:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:47,247 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:17:47,247 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:17:47,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-13 10:17:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:17:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 10:17:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:17:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 10:17:47,253 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2020-10-13 10:17:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:47,253 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 10:17:47,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 10:17:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 10:17:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:17:47,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:47,254 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:47,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:17:47,254 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1774194514, now seen corresponding path program 55 times [2020-10-13 10:17:47,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:47,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400156334] [2020-10-13 10:17:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:48,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:17:48,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:50,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:50,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:50,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:50,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:50,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:17:50,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:50,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:50,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400156334] [2020-10-13 10:17:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:50,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 10:17:50,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447869089] [2020-10-13 10:17:50,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 10:17:50,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:50,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 10:17:50,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:17:50,197 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 60 states. [2020-10-13 10:17:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:53,020 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-13 10:17:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 10:17:53,021 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 68 [2020-10-13 10:17:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:53,022 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:17:53,022 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:17:53,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-13 10:17:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:17:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 10:17:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:17:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-13 10:17:53,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-13 10:17:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:53,027 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-13 10:17:53,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 10:17:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-13 10:17:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:17:53,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:53,028 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:53,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:17:53,028 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1482304047, now seen corresponding path program 56 times [2020-10-13 10:17:53,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:53,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076043077] [2020-10-13 10:17:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:53,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:17:53,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:55,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:55,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:55,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:55,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:55,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076043077] [2020-10-13 10:17:55,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:55,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 10:17:55,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003541330] [2020-10-13 10:17:55,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 10:17:55,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 10:17:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:17:55,995 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 61 states. [2020-10-13 10:17:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:58,742 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-13 10:17:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 10:17:58,743 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 69 [2020-10-13 10:17:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:58,744 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:17:58,744 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:17:58,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-13 10:17:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:17:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 10:17:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:17:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 10:17:58,750 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-13 10:17:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:58,751 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 10:17:58,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 10:17:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 10:17:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:17:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:58,752 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:58,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:17:58,752 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1023634162, now seen corresponding path program 57 times [2020-10-13 10:17:58,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:58,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618670019] [2020-10-13 10:17:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:58,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:59,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:59,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:17:59,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:59,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-13 10:17:59,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:59,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 10:17:59,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:59,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:17:59,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:01,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:01,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:01,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:01,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:01,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:18:01,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:01,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:01,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:01,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:01,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:01,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618670019] [2020-10-13 10:18:01,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:01,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 10:18:01,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84019070] [2020-10-13 10:18:01,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 10:18:01,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 10:18:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:18:01,859 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 62 states. [2020-10-13 10:18:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:04,852 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-13 10:18:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 10:18:04,854 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 70 [2020-10-13 10:18:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:04,855 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:18:04,855 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:18:04,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2020-10-13 10:18:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:18:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 10:18:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:18:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 10:18:04,860 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-13 10:18:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:04,860 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 10:18:04,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 10:18:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 10:18:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:18:04,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:04,861 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:04,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:18:04,861 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash 310230385, now seen corresponding path program 58 times [2020-10-13 10:18:04,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:04,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248653952] [2020-10-13 10:18:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:04,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:05,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:05,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:18:05,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:05,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-13 10:18:05,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 10:18:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:18:05,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:07,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:07,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:07,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:07,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248653952] [2020-10-13 10:18:07,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:07,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 10:18:07,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059094220] [2020-10-13 10:18:07,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 10:18:07,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 10:18:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:18:07,967 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 63 states. [2020-10-13 10:18:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:10,872 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-13 10:18:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:18:10,873 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 71 [2020-10-13 10:18:10,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:10,874 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:18:10,874 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:18:10,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2020-10-13 10:18:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:18:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 10:18:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:18:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 10:18:10,879 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2020-10-13 10:18:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:10,880 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 10:18:10,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 10:18:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 10:18:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:18:10,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:10,881 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:10,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:18:10,882 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:10,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1289641618, now seen corresponding path program 59 times [2020-10-13 10:18:10,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:10,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920891808] [2020-10-13 10:18:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:11,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:18:11,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:14,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:14,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:14,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:14,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920891808] [2020-10-13 10:18:14,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:14,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 10:18:14,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966324746] [2020-10-13 10:18:14,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 10:18:14,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:14,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 10:18:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:18:14,189 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 64 states. [2020-10-13 10:18:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:17,113 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-13 10:18:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:18:17,114 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 72 [2020-10-13 10:18:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:17,115 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:18:17,115 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:18:17,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2020-10-13 10:18:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:18:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 10:18:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:18:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-13 10:18:17,120 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-13 10:18:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:17,120 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-13 10:18:17,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 10:18:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-13 10:18:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:18:17,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:17,121 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:17,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:18:17,121 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 653933841, now seen corresponding path program 60 times [2020-10-13 10:18:17,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:17,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984348126] [2020-10-13 10:18:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:18:18,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:20,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:20,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:20,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:20,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:20,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:20,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:18:20,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:20,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:20,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:20,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:20,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:20,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984348126] [2020-10-13 10:18:20,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:20,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 10:18:20,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859288213] [2020-10-13 10:18:20,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 10:18:20,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 10:18:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:18:20,470 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 65 states. [2020-10-13 10:18:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:23,742 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-13 10:18:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 10:18:23,743 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 73 [2020-10-13 10:18:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:23,745 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:18:23,745 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:18:23,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2020-10-13 10:18:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:18:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 10:18:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:18:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 10:18:23,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2020-10-13 10:18:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:23,750 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 10:18:23,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 10:18:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 10:18:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:18:23,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:23,751 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:23,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:18:23,752 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash 775230926, now seen corresponding path program 61 times [2020-10-13 10:18:23,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:23,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300116121] [2020-10-13 10:18:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:23,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:24,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:24,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:18:24,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:27,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:27,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:27,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:27,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:18:27,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:27,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300116121] [2020-10-13 10:18:27,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:27,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 10:18:27,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554630968] [2020-10-13 10:18:27,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 10:18:27,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 10:18:27,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:18:27,222 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 66 states. [2020-10-13 10:18:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:30,629 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-13 10:18:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 10:18:30,630 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 74 [2020-10-13 10:18:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:30,631 INFO L225 Difference]: With dead ends: 84 [2020-10-13 10:18:30,631 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:18:30,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2020-10-13 10:18:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:18:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 10:18:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:18:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-13 10:18:30,636 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-13 10:18:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:30,637 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-13 10:18:30,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 10:18:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-13 10:18:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:18:30,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:30,638 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:30,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:18:30,638 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash 240473265, now seen corresponding path program 62 times [2020-10-13 10:18:30,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:30,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516794712] [2020-10-13 10:18:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:30,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:31,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:31,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:18:31,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:31,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-13 10:18:31,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 10:18:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:18:31,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:34,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:34,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:34,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:34,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:34,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:18:34,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:34,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:34,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:34,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516794712] [2020-10-13 10:18:34,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:34,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 10:18:34,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469448527] [2020-10-13 10:18:34,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 10:18:34,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 10:18:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:18:34,231 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 67 states. [2020-10-13 10:18:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:37,737 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-13 10:18:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 10:18:37,738 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 75 [2020-10-13 10:18:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:37,739 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:18:37,739 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:18:37,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2020-10-13 10:18:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:18:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 10:18:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 10:18:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-13 10:18:37,744 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-10-13 10:18:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:37,744 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-13 10:18:37,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 10:18:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-13 10:18:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:18:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:37,745 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:37,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:18:37,745 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash 842854958, now seen corresponding path program 63 times [2020-10-13 10:18:37,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:37,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806491825] [2020-10-13 10:18:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:37,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:18:38,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:41,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:41,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:41,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:41,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:18:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:41,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806491825] [2020-10-13 10:18:41,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:41,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 10:18:41,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640811814] [2020-10-13 10:18:41,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 10:18:41,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 10:18:41,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:18:41,548 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 68 states. [2020-10-13 10:18:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:45,195 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-13 10:18:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 10:18:45,196 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 76 [2020-10-13 10:18:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:45,197 INFO L225 Difference]: With dead ends: 86 [2020-10-13 10:18:45,197 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:18:45,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2020-10-13 10:18:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:18:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 10:18:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:18:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 10:18:45,201 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-13 10:18:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:45,202 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 10:18:45,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-13 10:18:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 10:18:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 10:18:45,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:45,202 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:45,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:18:45,203 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1958149039, now seen corresponding path program 64 times [2020-10-13 10:18:45,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:45,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735273555] [2020-10-13 10:18:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:46,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:18:46,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:49,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:49,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:49,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:49,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:49,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:49,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:18:49,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:49,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:49,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:49,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:49,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:49,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735273555] [2020-10-13 10:18:49,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:49,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-13 10:18:49,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618936147] [2020-10-13 10:18:49,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-13 10:18:49,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-13 10:18:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:18:49,057 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 69 states. [2020-10-13 10:18:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:52,827 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-13 10:18:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 10:18:52,828 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 77 [2020-10-13 10:18:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:52,829 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:18:52,829 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:18:52,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2020-10-13 10:18:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:18:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 10:18:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:18:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 10:18:52,837 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2020-10-13 10:18:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:52,837 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 10:18:52,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-13 10:18:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 10:18:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:18:52,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:52,838 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:52,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 10:18:52,838 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1405040270, now seen corresponding path program 65 times [2020-10-13 10:18:52,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:52,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408635389] [2020-10-13 10:18:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:53,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:18:53,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:56,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:56,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:56,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:56,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:56,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:18:56,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:56,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:56,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:56,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408635389] [2020-10-13 10:18:56,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:56,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 10:18:56,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608623161] [2020-10-13 10:18:56,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 10:18:56,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 10:18:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:18:56,918 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 70 states. [2020-10-13 10:19:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:00,741 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 10:19:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-13 10:19:00,742 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 78 [2020-10-13 10:19:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:00,743 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:19:00,743 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 10:19:00,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2020-10-13 10:19:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 10:19:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 10:19:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:19:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-13 10:19:00,747 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-13 10:19:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:00,747 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-13 10:19:00,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-13 10:19:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-13 10:19:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:19:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:00,748 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:00,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 10:19:00,748 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1710273551, now seen corresponding path program 66 times [2020-10-13 10:19:00,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:00,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137020683] [2020-10-13 10:19:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:01,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:19:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:05,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:05,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:05,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:05,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:19:05,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:05,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:05,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137020683] [2020-10-13 10:19:05,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:05,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 10:19:05,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71782842] [2020-10-13 10:19:05,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 10:19:05,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 10:19:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:19:05,060 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 71 states. [2020-10-13 10:19:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:09,075 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-13 10:19:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-13 10:19:09,076 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 79 [2020-10-13 10:19:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:09,078 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:19:09,078 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:19:09,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2020-10-13 10:19:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:19:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:19:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:19:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 10:19:09,084 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-10-13 10:19:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:09,084 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 10:19:09,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 10:19:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 10:19:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:19:09,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:09,085 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:09,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 10:19:09,085 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 499245806, now seen corresponding path program 67 times [2020-10-13 10:19:09,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:09,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561415948] [2020-10-13 10:19:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:10,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:19:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:13,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:13,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:13,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561415948] [2020-10-13 10:19:13,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:13,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-13 10:19:13,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721556357] [2020-10-13 10:19:13,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-13 10:19:13,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:13,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-13 10:19:13,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 10:19:13,518 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 72 states. [2020-10-13 10:19:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:17,747 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-13 10:19:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 10:19:17,748 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 80 [2020-10-13 10:19:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:17,749 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:19:17,749 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:19:17,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2020-10-13 10:19:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:19:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 10:19:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:19:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-13 10:19:17,753 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-13 10:19:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:17,754 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-13 10:19:17,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-13 10:19:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-13 10:19:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:19:17,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:17,754 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:17,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 10:19:17,755 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 274869137, now seen corresponding path program 68 times [2020-10-13 10:19:17,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:17,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77419861] [2020-10-13 10:19:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:17,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:18,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:19:18,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:22,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:22,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:22,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:22,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77419861] [2020-10-13 10:19:22,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:22,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-13 10:19:22,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258020340] [2020-10-13 10:19:22,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-13 10:19:22,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:22,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-13 10:19:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:19:22,296 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 73 states. [2020-10-13 10:19:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:26,417 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-13 10:19:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 10:19:26,418 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 81 [2020-10-13 10:19:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:26,419 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:19:26,419 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:19:26,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2020-10-13 10:19:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:19:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-13 10:19:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 10:19:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-13 10:19:26,425 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2020-10-13 10:19:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:26,425 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-13 10:19:26,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-13 10:19:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-13 10:19:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:19:26,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:26,426 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:26,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 10:19:26,426 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1909126990, now seen corresponding path program 69 times [2020-10-13 10:19:26,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:26,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446267516] [2020-10-13 10:19:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:26,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:27,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1231 [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:19:27,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:31,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:31,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:31,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:31,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:19:31,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:31,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446267516] [2020-10-13 10:19:31,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:31,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-13 10:19:31,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095216958] [2020-10-13 10:19:31,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-13 10:19:31,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-13 10:19:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 10:19:31,145 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 74 states. [2020-10-13 10:19:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:35,617 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-13 10:19:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-13 10:19:35,618 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 82 [2020-10-13 10:19:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:35,619 INFO L225 Difference]: With dead ends: 92 [2020-10-13 10:19:35,619 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:19:35,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2020-10-13 10:19:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:19:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 10:19:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:19:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-13 10:19:35,625 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-13 10:19:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:35,626 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-13 10:19:35,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-13 10:19:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-13 10:19:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 10:19:35,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:35,626 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:35,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-13 10:19:35,627 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1031512881, now seen corresponding path program 70 times [2020-10-13 10:19:35,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:35,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231037044] [2020-10-13 10:19:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking...