/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:01:10,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:01:10,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:01:10,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:01:10,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:01:10,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:01:10,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:01:10,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:01:10,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:01:10,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:01:10,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:01:10,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:01:10,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:01:10,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:01:10,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:01:10,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:01:10,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:01:10,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:01:10,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:01:10,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:01:10,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:01:10,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:01:10,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:01:10,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:01:10,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:01:10,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:01:10,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:01:10,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:01:10,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:01:10,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:01:10,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:01:10,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:01:10,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:01:10,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:01:10,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:01:10,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:01:10,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:01:10,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:01:10,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:01:10,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:01:10,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:01:10,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:01:10,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:01:10,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:01:10,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:01:10,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:01:10,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:01:10,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:01:10,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:01:10,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:01:10,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:01:10,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:01:10,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:01:10,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:01:10,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:01:10,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:01:10,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:01:10,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:01:10,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:01:10,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:01:10,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:01:10,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:01:10,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:01:10,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:01:10,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:01:10,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:01:10,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:01:10,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:01:10,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:01:10,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:01:10,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:01:10,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:01:10,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:01:10,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:01:10,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:01:10,815 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:01:10,815 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:01:10,816 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-12 16:01:10,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe9b61d01/cf0954f19c9543e689a6afee7436d157/FLAG95a755af1 [2020-10-12 16:01:11,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:01:11,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-12 16:01:11,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe9b61d01/cf0954f19c9543e689a6afee7436d157/FLAG95a755af1 [2020-10-12 16:01:11,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe9b61d01/cf0954f19c9543e689a6afee7436d157 [2020-10-12 16:01:11,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:01:11,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:01:11,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:01:11,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:01:11,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:01:11,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:11,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e3b0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11, skipping insertion in model container [2020-10-12 16:01:11,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:11,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:01:11,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:01:11,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:01:11,958 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:01:11,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:01:11,986 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:01:11,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11 WrapperNode [2020-10-12 16:01:11,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:01:11,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:01:11,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:01:11,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:01:11,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... [2020-10-12 16:01:12,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:01:12,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:01:12,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:01:12,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:01:12,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:01:12,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:01:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:01:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:01:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:01:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:01:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:01:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:01:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:01:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:01:12,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:01:12,329 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:01:12,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:01:12 BoogieIcfgContainer [2020-10-12 16:01:12,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:01:12,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:01:12,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:01:12,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:01:12,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:01:11" (1/3) ... [2020-10-12 16:01:12,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f4b6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:01:12, skipping insertion in model container [2020-10-12 16:01:12,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:01:11" (2/3) ... [2020-10-12 16:01:12,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f4b6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:01:12, skipping insertion in model container [2020-10-12 16:01:12,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:01:12" (3/3) ... [2020-10-12 16:01:12,341 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2020-10-12 16:01:12,351 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:01:12,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:01:12,373 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:01:12,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:01:12,395 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:01:12,395 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:01:12,395 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:01:12,395 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:01:12,395 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:01:12,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:01:12,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:01:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-12 16:01:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:01:12,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:12,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:12,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-12 16:01:12,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:12,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100197994] [2020-10-12 16:01:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:12,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:12,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:12,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:01:12,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 16:01:12,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:01:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:01:12,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:01:12,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:12,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:12,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:12,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:12,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:01:12,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:12,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:12,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:12,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:12,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:12,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100197994] [2020-10-12 16:01:12,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:01:12,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:01:12,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572202589] [2020-10-12 16:01:12,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:01:12,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:01:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:01:12,812 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-12 16:01:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:12,843 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-12 16:01:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:01:12,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-12 16:01:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:12,852 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:01:12,852 INFO L226 Difference]: Without dead ends: 12 [2020-10-12 16:01:12,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:01:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-12 16:01:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-12 16:01:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-12 16:01:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-12 16:01:12,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-12 16:01:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:12,890 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-12 16:01:12,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:01:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-12 16:01:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:01:12,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:12,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:12,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:01:12,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-12 16:01:12,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:12,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114413673] [2020-10-12 16:01:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:13,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:13,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:01:13,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:13,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-12 16:01:13,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:01:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:13,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:01:13,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:13,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:13,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:13,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:13,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:13,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:01:13,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:13,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:13,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:13,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:13,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114413673] [2020-10-12 16:01:13,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:13,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:01:13,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27927851] [2020-10-12 16:01:13,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:01:13,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:13,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:01:13,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:01:13,096 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-12 16:01:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:13,116 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-12 16:01:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:01:13,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-12 16:01:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:13,119 INFO L225 Difference]: With dead ends: 18 [2020-10-12 16:01:13,119 INFO L226 Difference]: Without dead ends: 13 [2020-10-12 16:01:13,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:01:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-12 16:01:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-12 16:01:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 16:01:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-12 16:01:13,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-12 16:01:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:13,127 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-12 16:01:13,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:01:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-12 16:01:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:01:13,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:13,129 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:13,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:01:13,129 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:13,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-12 16:01:13,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:13,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052973404] [2020-10-12 16:01:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:13,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:13,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:01:13,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:13,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-12 16:01:13,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:13,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:01:13,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:13,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:01:13,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:13,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:13,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:13,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:13,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:13,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:13,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:01:13,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:13,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:13,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:13,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052973404] [2020-10-12 16:01:13,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:13,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:01:13,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776810431] [2020-10-12 16:01:13,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:01:13,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:01:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:01:13,446 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-12 16:01:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:13,468 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-12 16:01:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:01:13,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-12 16:01:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:13,470 INFO L225 Difference]: With dead ends: 19 [2020-10-12 16:01:13,470 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 16:01:13,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:01:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 16:01:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 16:01:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:01:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-12 16:01:13,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-12 16:01:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:13,477 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-12 16:01:13,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:01:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-12 16:01:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:01:13,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:13,478 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:13,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:01:13,479 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-12 16:01:13,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:13,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815225440] [2020-10-12 16:01:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:13,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:13,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:01:13,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:13,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-12 16:01:13,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:01:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:01:13,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:01:13,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:13,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:13,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:13,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:13,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:13,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:13,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:13,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815225440] [2020-10-12 16:01:13,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:13,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:01:13,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9553426] [2020-10-12 16:01:13,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:01:13,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:01:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:01:13,779 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-12 16:01:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:13,805 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-12 16:01:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:01:13,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 16:01:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:13,807 INFO L225 Difference]: With dead ends: 20 [2020-10-12 16:01:13,807 INFO L226 Difference]: Without dead ends: 15 [2020-10-12 16:01:13,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:01:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-12 16:01:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-12 16:01:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:01:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 16:01:13,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-12 16:01:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:13,813 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 16:01:13,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:01:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 16:01:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:01:13,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:13,815 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:13,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:01:13,815 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-12 16:01:13,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:13,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966808154] [2020-10-12 16:01:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:13,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:14,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:14,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:01:14,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:14,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-12 16:01:14,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:01:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:01:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:14,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:14,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:14,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:14,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:14,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:14,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:14,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:14,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:14,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966808154] [2020-10-12 16:01:14,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:14,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:01:14,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164947252] [2020-10-12 16:01:14,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:01:14,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:14,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:01:14,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:01:14,118 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-12 16:01:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:14,169 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-12 16:01:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:01:14,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-12 16:01:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:14,171 INFO L225 Difference]: With dead ends: 21 [2020-10-12 16:01:14,171 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:01:14,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:01:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:01:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:01:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:01:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-12 16:01:14,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-12 16:01:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:14,182 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-12 16:01:14,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:01:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-12 16:01:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:01:14,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:14,183 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:14,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:01:14,184 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-12 16:01:14,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:14,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922660484] [2020-10-12 16:01:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:14,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:14,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:14,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:01:14,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:14,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-12 16:01:14,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:14,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:01:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:01:14,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:14,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:14,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:14,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:14,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:14,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:14,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:14,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:14,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922660484] [2020-10-12 16:01:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:01:14,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048486417] [2020-10-12 16:01:14,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:01:14,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:14,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:01:14,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:01:14,486 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-12 16:01:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:14,528 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-12 16:01:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:01:14,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-12 16:01:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:14,530 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:01:14,530 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:01:14,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:01:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:01:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:01:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:01:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-12 16:01:14,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-12 16:01:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:14,536 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-12 16:01:14,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:01:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-12 16:01:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:01:14,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:14,537 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:14,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:01:14,538 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-12 16:01:14,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:14,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810522668] [2020-10-12 16:01:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:14,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:14,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:14,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:01:14,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-12 16:01:14,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:01:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:01:14,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:14,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:14,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:14,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:14,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:14,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:14,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:14,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:14,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:14,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810522668] [2020-10-12 16:01:14,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:14,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:01:14,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854802247] [2020-10-12 16:01:14,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:01:14,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:14,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:01:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:01:14,828 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-12 16:01:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:14,878 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-12 16:01:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:01:14,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-12 16:01:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:14,880 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:01:14,880 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:01:14,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:01:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:01:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 16:01:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:01:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-12 16:01:14,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-12 16:01:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:14,886 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-12 16:01:14,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:01:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-12 16:01:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:01:14,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:14,887 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:14,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:01:14,888 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -6162383, now seen corresponding path program 7 times [2020-10-12 16:01:14,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:14,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765380258] [2020-10-12 16:01:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:14,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:01:15,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-12 16:01:15,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:01:15,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:15,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:01:15,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:15,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:15,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:15,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:15,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:15,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765380258] [2020-10-12 16:01:15,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:15,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:01:15,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557603915] [2020-10-12 16:01:15,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:01:15,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:01:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:01:15,153 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-10-12 16:01:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:15,208 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-12 16:01:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:01:15,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-12 16:01:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:15,209 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:01:15,210 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:01:15,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:01:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:01:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:01:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:01:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-12 16:01:15,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-12 16:01:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:15,215 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-12 16:01:15,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:01:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-12 16:01:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:01:15,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:15,217 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:15,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:01:15,217 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:15,218 INFO L82 PathProgramCache]: Analyzing trace with hash -154572610, now seen corresponding path program 8 times [2020-10-12 16:01:15,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:15,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084211921] [2020-10-12 16:01:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:01:15,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 16:01:15,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:01:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:01:15,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:15,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:15,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:15,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:15,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:15,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:15,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084211921] [2020-10-12 16:01:15,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:15,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:01:15,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652006896] [2020-10-12 16:01:15,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:01:15,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:15,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:01:15,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:01:15,551 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2020-10-12 16:01:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:15,628 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-12 16:01:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:01:15,629 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-12 16:01:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:15,630 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:01:15,630 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:01:15,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:01:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:01:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:01:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:01:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-12 16:01:15,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-12 16:01:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:15,636 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-12 16:01:15,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:01:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-12 16:01:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:01:15,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:15,637 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:15,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:01:15,638 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash -460322351, now seen corresponding path program 9 times [2020-10-12 16:01:15,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:15,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055225362] [2020-10-12 16:01:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:15,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:01:15,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-12 16:01:15,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:01:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:01:15,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:15,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:15,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:15,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:15,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:15,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:15,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:16,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055225362] [2020-10-12 16:01:16,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:16,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:01:16,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392883477] [2020-10-12 16:01:16,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:01:16,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:01:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:01:16,002 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2020-10-12 16:01:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:16,106 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-12 16:01:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:01:16,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-12 16:01:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:16,108 INFO L225 Difference]: With dead ends: 26 [2020-10-12 16:01:16,108 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 16:01:16,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:01:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 16:01:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 16:01:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:01:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-12 16:01:16,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-12 16:01:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:16,113 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-12 16:01:16,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:01:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-12 16:01:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:01:16,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:16,115 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:16,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:01:16,115 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 10 times [2020-10-12 16:01:16,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:16,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927535559] [2020-10-12 16:01:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:16,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:16,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:01:16,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-12 16:01:16,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:16,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:01:16,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:16,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:01:16,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:16,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:16,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:16,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:16,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:01:16,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:16,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:16,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927535559] [2020-10-12 16:01:16,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:16,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:01:16,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684475827] [2020-10-12 16:01:16,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:01:16,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:16,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:01:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:01:16,553 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2020-10-12 16:01:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:16,650 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-12 16:01:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:01:16,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-12 16:01:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:16,652 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:01:16,652 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:01:16,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:01:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:01:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:01:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:01:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-12 16:01:16,657 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-12 16:01:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:16,658 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-12 16:01:16,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:01:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-12 16:01:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:01:16,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:16,659 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:16,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:01:16,659 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1178612593, now seen corresponding path program 11 times [2020-10-12 16:01:16,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:16,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155719160] [2020-10-12 16:01:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:16,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:16,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:01:16,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-12 16:01:16,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:01:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:01:16,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:17,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:17,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:17,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:17,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:17,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:17,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:17,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:17,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155719160] [2020-10-12 16:01:17,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:17,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:01:17,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146898100] [2020-10-12 16:01:17,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:01:17,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:01:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:01:17,125 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2020-10-12 16:01:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:17,251 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-12 16:01:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:01:17,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-12 16:01:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:17,252 INFO L225 Difference]: With dead ends: 28 [2020-10-12 16:01:17,252 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:01:17,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:01:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:01:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:01:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:01:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-12 16:01:17,258 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-12 16:01:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:17,259 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-12 16:01:17,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:01:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-12 16:01:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:01:17,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:17,260 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:17,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:01:17,260 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:17,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2081254018, now seen corresponding path program 12 times [2020-10-12 16:01:17,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:17,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804254351] [2020-10-12 16:01:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:17,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:17,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:17,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:01:17,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:17,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-12 16:01:17,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:01:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:01:17,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:17,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:17,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:17,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:17,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:17,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:17,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:17,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:17,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:17,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:17,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804254351] [2020-10-12 16:01:17,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:17,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:01:17,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347546204] [2020-10-12 16:01:17,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:01:17,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:01:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:01:17,777 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-10-12 16:01:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:17,892 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-12 16:01:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:01:17,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-12 16:01:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:17,893 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:01:17,893 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:01:17,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:01:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:01:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 16:01:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:01:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-12 16:01:17,898 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-12 16:01:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:17,898 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-12 16:01:17,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:01:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-12 16:01:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:01:17,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:17,899 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:17,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:01:17,900 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash -57903855, now seen corresponding path program 13 times [2020-10-12 16:01:17,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:17,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187183767] [2020-10-12 16:01:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:18,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:18,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:01:18,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:18,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 16:01:18,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:01:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:01:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:18,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:18,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:18,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:18,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:18,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:18,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:18,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:18,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:18,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:18,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:18,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187183767] [2020-10-12 16:01:18,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:18,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:01:18,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428697011] [2020-10-12 16:01:18,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:01:18,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:18,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:01:18,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:01:18,470 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2020-10-12 16:01:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:18,623 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-12 16:01:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:01:18,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-10-12 16:01:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:18,624 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:01:18,625 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:01:18,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:01:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:01:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:01:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:01:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-12 16:01:18,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-12 16:01:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:18,630 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-12 16:01:18,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:01:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-12 16:01:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:01:18,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:18,632 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:18,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:01:18,632 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1758558242, now seen corresponding path program 14 times [2020-10-12 16:01:18,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:18,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116111594] [2020-10-12 16:01:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:18,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:18,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:01:18,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-12 16:01:18,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:01:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:01:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:19,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:19,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:19,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:19,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:19,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:19,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:19,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:19,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:19,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:19,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:19,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:19,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116111594] [2020-10-12 16:01:19,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:19,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:01:19,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986070290] [2020-10-12 16:01:19,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:01:19,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:19,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:01:19,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:01:19,202 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-10-12 16:01:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:19,354 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-12 16:01:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:01:19,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-12 16:01:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:19,355 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:01:19,355 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:01:19,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:01:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:01:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:01:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:01:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-12 16:01:19,360 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-12 16:01:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:19,361 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-12 16:01:19,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:01:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-12 16:01:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:01:19,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:19,362 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:19,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:01:19,362 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1355730609, now seen corresponding path program 15 times [2020-10-12 16:01:19,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:19,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986739047] [2020-10-12 16:01:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:19,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:19,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:19,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:01:19,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:19,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-12 16:01:19,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:01:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:01:19,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:20,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:20,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:20,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:20,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:20,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:20,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:20,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:20,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:20,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986739047] [2020-10-12 16:01:20,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:20,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:01:20,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843424156] [2020-10-12 16:01:20,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:01:20,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:01:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:01:20,042 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2020-10-12 16:01:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:20,203 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-12 16:01:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:01:20,204 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-10-12 16:01:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:20,205 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:01:20,205 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:01:20,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:01:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:01:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 16:01:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:01:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-12 16:01:20,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-12 16:01:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:20,210 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-12 16:01:20,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:01:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-12 16:01:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:01:20,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:20,211 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:20,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:01:20,212 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash -885562818, now seen corresponding path program 16 times [2020-10-12 16:01:20,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:20,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398981369] [2020-10-12 16:01:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:20,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:01:20,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-12 16:01:20,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:01:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:01:20,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:20,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:20,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:20,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:20,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:20,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:20,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:20,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:20,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:20,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:20,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398981369] [2020-10-12 16:01:20,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:20,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:01:20,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606691347] [2020-10-12 16:01:20,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:01:20,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:01:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:01:20,981 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2020-10-12 16:01:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:21,166 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-12 16:01:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:01:21,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-12 16:01:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:21,168 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:01:21,168 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:01:21,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:01:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:01:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:01:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:01:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-12 16:01:21,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-12 16:01:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:21,173 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-12 16:01:21,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:01:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-12 16:01:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:01:21,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:21,174 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:21,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:01:21,175 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1646182319, now seen corresponding path program 17 times [2020-10-12 16:01:21,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:21,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645700117] [2020-10-12 16:01:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:21,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:01:21,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-12 16:01:21,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:01:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:01:21,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:22,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:22,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:22,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:22,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:22,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:22,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:22,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:22,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645700117] [2020-10-12 16:01:22,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:22,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:01:22,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044750495] [2020-10-12 16:01:22,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:01:22,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:22,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:01:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:01:22,154 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2020-10-12 16:01:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:22,449 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-12 16:01:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:01:22,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-10-12 16:01:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:22,450 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:01:22,450 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:01:22,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:01:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:01:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-12 16:01:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:01:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-12 16:01:22,458 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-12 16:01:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:22,459 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-12 16:01:22,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:01:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-12 16:01:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:01:22,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:22,463 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:22,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:01:22,463 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash 544416926, now seen corresponding path program 18 times [2020-10-12 16:01:22,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:22,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976198760] [2020-10-12 16:01:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:22,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:22,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:01:22,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-12 16:01:22,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:01:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:01:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:23,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:23,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:23,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:23,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:23,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:23,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:23,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:23,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:23,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976198760] [2020-10-12 16:01:23,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:23,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:01:23,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872960850] [2020-10-12 16:01:23,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:01:23,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:01:23,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:01:23,390 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2020-10-12 16:01:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:23,613 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-12 16:01:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:01:23,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-12 16:01:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:23,614 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:01:23,614 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:01:23,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:01:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:01:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 16:01:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:01:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-12 16:01:23,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-12 16:01:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:23,620 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-12 16:01:23,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:01:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-12 16:01:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:01:23,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:23,621 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:23,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:01:23,621 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash -266483215, now seen corresponding path program 19 times [2020-10-12 16:01:23,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:23,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069245936] [2020-10-12 16:01:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:24,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:24,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:01:24,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:24,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-12 16:01:24,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:01:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:01:24,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:24,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:24,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:24,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:24,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:24,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:24,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069245936] [2020-10-12 16:01:24,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:24,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:01:24,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281134573] [2020-10-12 16:01:24,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:01:24,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:01:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:01:24,623 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2020-10-12 16:01:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:24,881 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-12 16:01:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:01:24,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-10-12 16:01:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:24,883 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:01:24,883 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:01:24,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:01:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:01:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 16:01:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:01:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-12 16:01:24,888 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-12 16:01:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:24,888 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-12 16:01:24,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:01:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-12 16:01:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:01:24,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:24,889 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:24,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:01:24,890 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:24,890 INFO L82 PathProgramCache]: Analyzing trace with hash 365416190, now seen corresponding path program 20 times [2020-10-12 16:01:24,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:24,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003988479] [2020-10-12 16:01:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:24,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:25,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:25,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:01:25,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-12 16:01:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:01:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:01:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:26,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:26,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:26,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:26,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:26,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:26,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:26,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:26,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:26,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003988479] [2020-10-12 16:01:26,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:26,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:01:26,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915366290] [2020-10-12 16:01:26,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:01:26,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:01:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:01:26,029 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2020-10-12 16:01:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:26,312 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-12 16:01:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:01:26,312 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-12 16:01:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:26,313 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:01:26,313 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:01:26,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:01:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:01:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 16:01:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:01:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-12 16:01:26,319 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-12 16:01:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:26,320 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-12 16:01:26,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:01:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-12 16:01:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:01:26,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:26,322 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:26,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:01:26,322 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1520538735, now seen corresponding path program 21 times [2020-10-12 16:01:26,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:26,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066535303] [2020-10-12 16:01:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:26,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:01:26,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:26,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 642 [2020-10-12 16:01:26,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:26,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:01:26,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:26,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:01:26,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:27,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:27,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:27,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:27,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:27,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:27,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:27,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:27,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:27,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066535303] [2020-10-12 16:01:27,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:27,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:01:27,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856664544] [2020-10-12 16:01:27,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:01:27,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:01:27,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:01:27,397 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2020-10-12 16:01:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:27,705 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-12 16:01:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:01:27,708 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-10-12 16:01:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:27,708 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:01:27,709 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:01:27,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:01:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:01:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 16:01:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:01:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-12 16:01:27,720 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-12 16:01:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:27,720 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-12 16:01:27,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:01:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-12 16:01:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:01:27,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:27,721 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:27,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:01:27,721 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 22 times [2020-10-12 16:01:27,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:27,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498057463] [2020-10-12 16:01:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:27,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:28,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:01:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-12 16:01:28,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:01:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:01:28,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:28,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:28,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:28,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:28,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:28,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:28,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:28,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:28,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:28,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:28,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:28,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:28,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498057463] [2020-10-12 16:01:28,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:28,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:01:28,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446656485] [2020-10-12 16:01:28,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:01:28,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:01:28,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:01:28,994 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2020-10-12 16:01:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:29,346 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-12 16:01:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:01:29,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-12 16:01:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:29,347 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:01:29,348 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:01:29,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:01:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:01:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:01:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:01:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-12 16:01:29,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-12 16:01:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:29,356 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-12 16:01:29,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:01:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-12 16:01:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:01:29,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:29,357 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:29,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:01:29,357 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash 217916721, now seen corresponding path program 23 times [2020-10-12 16:01:29,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:29,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245371974] [2020-10-12 16:01:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:29,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:30,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:30,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:01:30,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:30,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-12 16:01:30,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:30,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:01:30,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:01:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:30,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:30,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:30,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:30,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:30,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:30,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:30,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:30,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:30,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:30,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245371974] [2020-10-12 16:01:30,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:30,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:01:30,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009677264] [2020-10-12 16:01:30,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:01:30,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:01:30,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:01:30,539 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2020-10-12 16:01:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:30,981 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-12 16:01:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:01:30,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2020-10-12 16:01:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:30,987 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:01:30,987 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:01:30,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:01:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:01:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 16:01:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:01:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-12 16:01:30,992 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-12 16:01:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:30,992 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-12 16:01:30,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:01:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-12 16:01:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:01:30,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:30,993 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:30,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:01:30,994 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1798054978, now seen corresponding path program 24 times [2020-10-12 16:01:30,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:30,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516613397] [2020-10-12 16:01:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:31,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:32,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:32,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:01:32,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:32,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-12 16:01:32,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:01:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:01:32,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:32,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:32,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:32,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:32,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:32,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:32,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:32,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:32,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:32,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:32,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:32,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:32,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516613397] [2020-10-12 16:01:32,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:32,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:01:32,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7789339] [2020-10-12 16:01:32,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:01:32,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:01:32,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:01:32,567 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2020-10-12 16:01:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:32,993 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-12 16:01:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:01:32,993 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-12 16:01:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:32,994 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:01:32,994 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:01:32,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:01:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:01:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 16:01:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:01:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-12 16:01:33,000 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-12 16:01:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:33,001 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-12 16:01:33,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:01:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-12 16:01:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:01:33,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:33,001 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:33,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:01:33,002 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 131331793, now seen corresponding path program 25 times [2020-10-12 16:01:33,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:33,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474379891] [2020-10-12 16:01:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:33,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:33,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:01:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-12 16:01:33,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:01:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:01:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:34,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:34,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:34,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:34,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:34,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:34,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:34,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:34,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:34,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474379891] [2020-10-12 16:01:34,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:34,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:01:34,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841121141] [2020-10-12 16:01:34,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:01:34,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:01:34,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:01:34,136 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2020-10-12 16:01:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:34,602 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-12 16:01:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:01:34,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-10-12 16:01:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:34,604 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:01:34,604 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:01:34,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:01:34,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:01:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 16:01:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:01:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-12 16:01:34,611 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-12 16:01:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:34,612 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-12 16:01:34,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:01:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-12 16:01:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:01:34,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:34,614 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:34,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:01:34,614 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash -187220450, now seen corresponding path program 26 times [2020-10-12 16:01:34,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:34,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253702357] [2020-10-12 16:01:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:34,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:35,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:35,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:01:35,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:35,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-12 16:01:35,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:01:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:01:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:36,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:36,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:36,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:36,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:36,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:36,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:36,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:36,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:36,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:36,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:36,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253702357] [2020-10-12 16:01:36,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:36,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:01:36,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476462166] [2020-10-12 16:01:36,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:01:36,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:36,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:01:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:01:36,162 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2020-10-12 16:01:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:36,610 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-12 16:01:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:01:36,611 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2020-10-12 16:01:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:36,612 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:01:36,612 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:01:36,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:01:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:01:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 16:01:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:01:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-12 16:01:36,619 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-12 16:01:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:36,619 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-12 16:01:36,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:01:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-12 16:01:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:01:36,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:36,623 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:36,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:01:36,624 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1472405391, now seen corresponding path program 27 times [2020-10-12 16:01:36,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:36,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684884976] [2020-10-12 16:01:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:36,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:37,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:37,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:01:37,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:37,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-12 16:01:37,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:37,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:01:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:01:37,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:38,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:38,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:38,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:38,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:38,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:38,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:38,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:38,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:38,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:38,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:38,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:38,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684884976] [2020-10-12 16:01:38,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:38,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:01:38,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840357151] [2020-10-12 16:01:38,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:01:38,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:38,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:01:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:01:38,360 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2020-10-12 16:01:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:38,870 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-12 16:01:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:01:38,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-10-12 16:01:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:38,871 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:01:38,871 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:01:38,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:01:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:01:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 16:01:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:01:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-12 16:01:38,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-12 16:01:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:38,878 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-12 16:01:38,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:01:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-12 16:01:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:01:38,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:38,879 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:38,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:01:38,879 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1636534398, now seen corresponding path program 28 times [2020-10-12 16:01:38,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:38,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110785302] [2020-10-12 16:01:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:38,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:39,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:39,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:01:39,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-12 16:01:39,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:01:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:01:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:40,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:40,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:40,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:40,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:40,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:40,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110785302] [2020-10-12 16:01:40,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:40,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:01:40,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629342188] [2020-10-12 16:01:40,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:01:40,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:01:40,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:01:40,448 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2020-10-12 16:01:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:40,983 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-12 16:01:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:01:40,984 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-10-12 16:01:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:40,984 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:01:40,984 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:01:40,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:01:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:01:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 16:01:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:01:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-12 16:01:40,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-12 16:01:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:40,998 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-12 16:01:40,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:01:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-12 16:01:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:01:40,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:40,999 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:40,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:01:40,999 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash -770579951, now seen corresponding path program 29 times [2020-10-12 16:01:41,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:41,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126352038] [2020-10-12 16:01:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:41,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:41,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:01:41,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-12 16:01:41,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:01:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:01:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:42,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:42,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126352038] [2020-10-12 16:01:42,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:42,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:01:42,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307766109] [2020-10-12 16:01:42,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:01:42,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:01:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:01:42,366 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2020-10-12 16:01:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:42,945 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-12 16:01:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:01:42,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-10-12 16:01:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:42,946 INFO L225 Difference]: With dead ends: 46 [2020-10-12 16:01:42,946 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:01:42,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:01:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:01:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 16:01:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:01:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-12 16:01:42,952 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-12 16:01:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:42,952 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-12 16:01:42,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:01:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-12 16:01:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:01:42,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:42,953 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:42,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:01:42,953 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1918286558, now seen corresponding path program 30 times [2020-10-12 16:01:42,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:42,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329198908] [2020-10-12 16:01:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:43,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:43,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:01:43,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-12 16:01:43,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:01:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:01:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:44,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:44,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:44,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:44,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:44,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329198908] [2020-10-12 16:01:44,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:44,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:01:44,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878284561] [2020-10-12 16:01:44,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:01:44,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:44,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:01:44,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:01:44,556 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2020-10-12 16:01:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:45,159 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-12 16:01:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:01:45,161 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-10-12 16:01:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:45,162 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:01:45,162 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:01:45,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:01:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:01:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 16:01:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:01:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-12 16:01:45,166 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-12 16:01:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:45,167 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-12 16:01:45,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:01:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-12 16:01:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:01:45,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:45,167 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:45,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:01:45,167 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash -626197583, now seen corresponding path program 31 times [2020-10-12 16:01:45,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:45,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523265814] [2020-10-12 16:01:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:45,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:46,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:46,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:01:46,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-12 16:01:46,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:01:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:01:46,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:46,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:46,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:46,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:46,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:46,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:46,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523265814] [2020-10-12 16:01:46,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:46,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:01:46,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11612278] [2020-10-12 16:01:46,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:01:46,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:01:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:01:46,917 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2020-10-12 16:01:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:47,577 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-12 16:01:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:01:47,579 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2020-10-12 16:01:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:47,579 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:01:47,579 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:01:47,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:01:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:01:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 16:01:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:01:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-12 16:01:47,585 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-12 16:01:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:47,585 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-12 16:01:47,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:01:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-12 16:01:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:01:47,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:47,586 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:47,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:01:47,586 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2099172670, now seen corresponding path program 32 times [2020-10-12 16:01:47,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:47,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170571126] [2020-10-12 16:01:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:47,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:48,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:48,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:01:48,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-12 16:01:48,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:01:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:01:48,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:49,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:49,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:49,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:49,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:49,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:49,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:49,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:49,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170571126] [2020-10-12 16:01:49,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:49,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:01:49,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217927034] [2020-10-12 16:01:49,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:01:49,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:01:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:01:49,413 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2020-10-12 16:01:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:50,061 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-12 16:01:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:01:50,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2020-10-12 16:01:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:50,063 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:01:50,063 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:01:50,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:01:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:01:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-12 16:01:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:01:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-12 16:01:50,071 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-12 16:01:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:50,072 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-12 16:01:50,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:01:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-12 16:01:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:01:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:50,072 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:50,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:01:50,073 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash 686304593, now seen corresponding path program 33 times [2020-10-12 16:01:50,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:50,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077172318] [2020-10-12 16:01:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:51,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:51,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:01:51,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:51,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-12 16:01:51,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:51,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:01:51,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:51,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:01:51,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:52,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:52,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:52,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:52,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:52,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:52,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077172318] [2020-10-12 16:01:52,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:52,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:01:52,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134613675] [2020-10-12 16:01:52,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:01:52,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:52,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:01:52,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:01:52,063 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2020-10-12 16:01:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:54,904 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-12 16:01:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:01:54,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-10-12 16:01:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:54,956 INFO L225 Difference]: With dead ends: 50 [2020-10-12 16:01:54,956 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:01:54,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:01:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:01:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 16:01:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:01:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-12 16:01:54,962 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-12 16:01:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:54,963 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-12 16:01:54,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:01:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-12 16:01:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:01:54,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:54,963 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:54,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:01:54,964 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash -162932834, now seen corresponding path program 34 times [2020-10-12 16:01:54,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:54,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311676518] [2020-10-12 16:01:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:55,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:55,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:01:55,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-12 16:01:55,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:01:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:01:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:57,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:57,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:57,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:57,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:57,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:57,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:57,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:57,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:57,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:57,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311676518] [2020-10-12 16:01:57,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:57,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:01:57,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536053832] [2020-10-12 16:01:57,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:01:57,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:01:57,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:01:57,081 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2020-10-12 16:01:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:57,919 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-12 16:01:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:01:57,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-10-12 16:01:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:57,920 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:01:57,920 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:01:57,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:01:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:01:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 16:01:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:01:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-12 16:01:57,926 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-12 16:01:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:57,926 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-12 16:01:57,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:01:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-12 16:01:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:01:57,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:57,927 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:57,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:01:57,927 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash -719489295, now seen corresponding path program 35 times [2020-10-12 16:01:57,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:57,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918835952] [2020-10-12 16:01:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:58,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:58,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:01:58,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:58,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-12 16:01:58,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:58,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:01:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:01:58,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:00,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:00,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:00,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:00,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:00,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:00,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:00,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:00,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:00,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:00,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918835952] [2020-10-12 16:02:00,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:00,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:02:00,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499709607] [2020-10-12 16:02:00,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:02:00,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:02:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:02:00,108 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2020-10-12 16:02:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:00,939 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-12 16:02:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:02:00,939 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2020-10-12 16:02:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:00,940 INFO L225 Difference]: With dead ends: 52 [2020-10-12 16:02:00,941 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:02:00,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:02:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:02:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 16:02:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:02:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-12 16:02:00,947 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-12 16:02:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:00,947 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-12 16:02:00,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:02:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-12 16:02:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:02:00,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:00,948 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:00,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:02:00,948 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash -792870402, now seen corresponding path program 36 times [2020-10-12 16:02:00,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:00,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119561798] [2020-10-12 16:02:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:00,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:02:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:02,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:02:02,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:03,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:03,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:03,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:03,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:03,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:03,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:03,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:03,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119561798] [2020-10-12 16:02:03,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:03,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:02:03,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191992636] [2020-10-12 16:02:03,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:02:03,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:02:03,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:02:03,356 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2020-10-12 16:02:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:04,306 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-12 16:02:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:02:04,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2020-10-12 16:02:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:04,313 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:02:04,314 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:02:04,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:02:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:02:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 16:02:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:02:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-12 16:02:04,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-12 16:02:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:04,319 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-12 16:02:04,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:02:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-12 16:02:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:02:04,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:04,320 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:04,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:02:04,320 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1227282577, now seen corresponding path program 37 times [2020-10-12 16:02:04,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:04,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198942050] [2020-10-12 16:02:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:04,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:05,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:02:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:06,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:06,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:06,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198942050] [2020-10-12 16:02:06,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:06,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:02:06,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738711274] [2020-10-12 16:02:06,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:02:06,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:06,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:02:06,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:02:06,434 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2020-10-12 16:02:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:07,404 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-12 16:02:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:02:07,408 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2020-10-12 16:02:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:07,409 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:02:07,409 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:02:07,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:02:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:02:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 16:02:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:02:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-12 16:02:07,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-12 16:02:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:07,420 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-12 16:02:07,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:02:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-12 16:02:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:02:07,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:07,421 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:07,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:02:07,421 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash -572484514, now seen corresponding path program 38 times [2020-10-12 16:02:07,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:07,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227356105] [2020-10-12 16:02:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:02:08,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:08,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1215 [2020-10-12 16:02:08,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:02:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:02:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:09,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:09,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:09,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:09,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:09,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:09,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:09,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:09,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227356105] [2020-10-12 16:02:09,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:09,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:02:09,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646058715] [2020-10-12 16:02:09,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:02:09,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:02:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:02:09,924 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2020-10-12 16:02:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:10,966 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-12 16:02:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:02:10,966 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2020-10-12 16:02:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:10,967 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:02:10,967 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:02:10,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:02:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:02:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 16:02:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:02:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-12 16:02:10,972 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-12 16:02:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:10,973 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-12 16:02:10,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:02:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-12 16:02:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:02:10,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:10,973 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:10,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:02:10,973 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -530689487, now seen corresponding path program 39 times [2020-10-12 16:02:10,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:10,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3713104] [2020-10-12 16:02:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:02:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:12,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:02:12,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:13,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:13,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:13,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:13,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:13,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:13,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:13,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:13,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:13,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3713104] [2020-10-12 16:02:13,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:13,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:02:13,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185139670] [2020-10-12 16:02:13,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:02:13,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:13,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:02:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:02:13,864 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2020-10-12 16:02:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:14,854 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-12 16:02:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:02:14,856 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2020-10-12 16:02:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:14,857 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:02:14,857 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:02:14,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:02:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:02:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-12 16:02:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:02:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-12 16:02:14,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-12 16:02:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:14,862 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-12 16:02:14,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:02:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-12 16:02:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:02:14,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:14,863 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:14,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:02:14,863 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:14,863 INFO L82 PathProgramCache]: Analyzing trace with hash 764956350, now seen corresponding path program 40 times [2020-10-12 16:02:14,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:14,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621729908] [2020-10-12 16:02:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:16,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:16,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:02:16,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:16,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-12 16:02:16,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:02:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:02:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:17,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:17,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:17,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:17,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:17,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:17,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621729908] [2020-10-12 16:02:17,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:17,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:02:17,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013506981] [2020-10-12 16:02:17,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:02:17,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:02:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:02:17,594 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2020-10-12 16:02:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:18,766 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-12 16:02:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:02:18,768 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2020-10-12 16:02:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:18,769 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:02:18,769 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:02:18,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:02:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:02:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 16:02:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:02:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-12 16:02:18,774 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-12 16:02:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:18,774 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-12 16:02:18,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:02:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-12 16:02:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:02:18,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:18,775 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:18,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:02:18,775 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2019695663, now seen corresponding path program 41 times [2020-10-12 16:02:18,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:18,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614587676] [2020-10-12 16:02:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:20,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:20,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:02:20,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:20,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1652 [2020-10-12 16:02:20,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:20,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:02:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:02:20,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:21,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:21,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:21,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:21,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:21,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:21,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:21,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614587676] [2020-10-12 16:02:21,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:21,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:02:21,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796547608] [2020-10-12 16:02:21,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:02:21,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:02:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:02:21,822 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2020-10-12 16:02:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:23,000 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-12 16:02:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:02:23,001 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2020-10-12 16:02:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:23,002 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:02:23,002 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:02:23,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:02:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:02:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 16:02:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:02:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-12 16:02:23,006 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-12 16:02:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:23,006 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-12 16:02:23,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:02:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-12 16:02:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:02:23,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:23,007 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:23,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:02:23,007 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1850405150, now seen corresponding path program 42 times [2020-10-12 16:02:23,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:23,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994146095] [2020-10-12 16:02:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:23,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:24,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:24,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:02:24,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:24,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-12 16:02:24,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:02:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:02:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:25,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:25,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:25,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:25,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:25,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:25,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:25,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:25,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:25,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:25,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:25,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994146095] [2020-10-12 16:02:25,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:25,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:02:25,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661448153] [2020-10-12 16:02:25,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:02:25,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:02:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:02:25,946 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2020-10-12 16:02:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:27,158 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-12 16:02:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:02:27,160 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2020-10-12 16:02:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:27,160 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:02:27,160 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:02:27,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:02:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:02:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 16:02:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:02:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-12 16:02:27,166 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-12 16:02:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:27,166 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-12 16:02:27,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:02:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-12 16:02:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:02:27,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:27,167 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:27,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:02:27,167 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1564446065, now seen corresponding path program 43 times [2020-10-12 16:02:27,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:27,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378101808] [2020-10-12 16:02:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:28,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1325 [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:02:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:30,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:30,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:30,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:30,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:30,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378101808] [2020-10-12 16:02:30,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:30,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:02:30,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633008157] [2020-10-12 16:02:30,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:02:30,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:02:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:02:30,087 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2020-10-12 16:02:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:31,418 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-12 16:02:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:02:31,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2020-10-12 16:02:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:31,420 INFO L225 Difference]: With dead ends: 60 [2020-10-12 16:02:31,420 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:02:31,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:02:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:02:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 16:02:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:02:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-12 16:02:31,425 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-12 16:02:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:31,426 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-12 16:02:31,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:02:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-12 16:02:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:02:31,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:31,426 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:31,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:02:31,427 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1289649022, now seen corresponding path program 44 times [2020-10-12 16:02:31,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:31,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736809379] [2020-10-12 16:02:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:33,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:33,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:02:33,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1579 [2020-10-12 16:02:33,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:02:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:02:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:34,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:34,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:34,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:34,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:34,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:34,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:34,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736809379] [2020-10-12 16:02:34,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:34,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:02:34,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66641529] [2020-10-12 16:02:34,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:02:34,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:02:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:02:34,629 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2020-10-12 16:02:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:35,963 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-12 16:02:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:02:35,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2020-10-12 16:02:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:35,965 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:02:35,965 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:02:35,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:02:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:02:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 16:02:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:02:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-12 16:02:35,971 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-12 16:02:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:35,971 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-12 16:02:35,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:02:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-12 16:02:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:02:35,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:35,972 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:35,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:02:35,973 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1360875281, now seen corresponding path program 45 times [2020-10-12 16:02:35,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:35,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511285948] [2020-10-12 16:02:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:02:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:39,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:39,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:39,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:39,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:39,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:39,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:39,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:39,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:39,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511285948] [2020-10-12 16:02:39,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:39,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:02:39,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699182890] [2020-10-12 16:02:39,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:02:39,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:02:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:02:39,482 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2020-10-12 16:02:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:40,860 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-12 16:02:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:02:40,860 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2020-10-12 16:02:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:40,861 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:02:40,861 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:02:40,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:02:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:02:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 16:02:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:02:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-12 16:02:40,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-12 16:02:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:40,866 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-12 16:02:40,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:02:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-12 16:02:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:02:40,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:40,867 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:40,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:02:40,867 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 46 times [2020-10-12 16:02:40,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:40,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264123021] [2020-10-12 16:02:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:43,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:43,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:02:43,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:43,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2379 [2020-10-12 16:02:43,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:43,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:02:43,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:43,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:02:43,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:45,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:45,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:45,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:45,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264123021] [2020-10-12 16:02:45,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:45,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:02:45,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505032460] [2020-10-12 16:02:45,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:02:45,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:02:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:02:45,062 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2020-10-12 16:02:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:46,528 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-12 16:02:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:02:46,531 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2020-10-12 16:02:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:46,532 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:02:46,532 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:02:46,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:02:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:02:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 16:02:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:02:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-12 16:02:46,537 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-12 16:02:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:46,537 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-12 16:02:46,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:02:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-12 16:02:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:02:46,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:46,538 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:46,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:02:46,538 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash -997119823, now seen corresponding path program 47 times [2020-10-12 16:02:46,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:46,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773871522] [2020-10-12 16:02:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:48,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:48,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:02:48,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-12 16:02:48,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:02:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:02:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:50,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:50,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:50,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:50,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:50,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:50,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:50,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:50,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:50,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:50,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:50,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:50,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773871522] [2020-10-12 16:02:50,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:50,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:02:50,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249422414] [2020-10-12 16:02:50,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:02:50,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:02:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:02:50,775 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2020-10-12 16:02:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:52,380 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-12 16:02:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:02:52,381 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2020-10-12 16:02:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:52,381 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:02:52,381 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:02:52,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:02:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:02:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 16:02:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:02:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-12 16:02:52,387 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-12 16:02:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:52,387 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-12 16:02:52,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:02:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-12 16:02:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:02:52,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:52,388 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:52,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:02:52,388 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:52,389 INFO L82 PathProgramCache]: Analyzing trace with hash -809482178, now seen corresponding path program 48 times [2020-10-12 16:02:52,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:52,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153083785] [2020-10-12 16:02:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:02:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-12 16:02:54,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:02:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:02:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:56,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:56,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:56,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:56,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:56,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:56,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:56,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:56,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153083785] [2020-10-12 16:02:56,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:56,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:02:56,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167147022] [2020-10-12 16:02:56,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:02:56,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:02:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:02:56,375 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2020-10-12 16:02:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:57,977 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-12 16:02:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:02:57,977 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2020-10-12 16:02:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:57,978 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:02:57,978 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:02:57,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:02:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:02:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-12 16:02:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:02:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-12 16:02:57,984 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-12 16:02:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:57,984 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-12 16:02:57,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:02:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-12 16:02:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:02:57,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:57,985 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:57,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:02:57,986 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash 712317521, now seen corresponding path program 49 times [2020-10-12 16:02:57,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:57,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611052075] [2020-10-12 16:02:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2149 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:02,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611052075] [2020-10-12 16:03:02,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:02,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:03:02,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333159012] [2020-10-12 16:03:02,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:03:02,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:03:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:03:02,116 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2020-10-12 16:03:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:03,710 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-12 16:03:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:03:03,711 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2020-10-12 16:03:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:03,712 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:03:03,712 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:03:03,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:03:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:03:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 16:03:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:03:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-12 16:03:03,718 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-12 16:03:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:03,718 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-12 16:03:03,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:03:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-12 16:03:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:03:03,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:03,719 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:03,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:03:03,719 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:03,719 INFO L82 PathProgramCache]: Analyzing trace with hash 643467934, now seen corresponding path program 50 times [2020-10-12 16:03:03,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:03,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667757198] [2020-10-12 16:03:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:03:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:07,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:07,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:07,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:07,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:07,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:07,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:07,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:07,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667757198] [2020-10-12 16:03:07,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:07,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:03:07,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008713741] [2020-10-12 16:03:07,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:03:07,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:07,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:03:07,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:03:07,420 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2020-10-12 16:03:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:09,206 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-12 16:03:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:03:09,209 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2020-10-12 16:03:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:09,210 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:03:09,210 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:03:09,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:03:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:03:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 16:03:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:03:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-12 16:03:09,215 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-12 16:03:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:09,215 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-12 16:03:09,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:03:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-12 16:03:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:03:09,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:09,216 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:09,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:03:09,216 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1490869263, now seen corresponding path program 51 times [2020-10-12 16:03:09,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:09,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65911282] [2020-10-12 16:03:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:09,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:12,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3284 [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:03:12,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:14,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:14,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:14,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:14,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:14,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:14,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:14,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:14,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:14,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65911282] [2020-10-12 16:03:14,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:14,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:03:14,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310662426] [2020-10-12 16:03:14,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:03:14,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:14,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:03:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:03:14,713 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2020-10-12 16:03:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:16,504 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-12 16:03:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:03:16,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2020-10-12 16:03:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:16,509 INFO L225 Difference]: With dead ends: 68 [2020-10-12 16:03:16,509 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 16:03:16,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:03:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 16:03:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 16:03:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:03:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-12 16:03:16,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-12 16:03:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:16,515 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-12 16:03:16,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:03:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-12 16:03:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:03:16,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:16,516 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:16,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:03:16,517 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1064154366, now seen corresponding path program 52 times [2020-10-12 16:03:16,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:16,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486331434] [2020-10-12 16:03:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2756 [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:03:19,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:03:19,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:21,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:21,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:21,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:21,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486331434] [2020-10-12 16:03:21,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:21,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:03:21,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504085527] [2020-10-12 16:03:21,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:03:21,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:03:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:03:21,540 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2020-10-12 16:03:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:23,409 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-12 16:03:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:03:23,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2020-10-12 16:03:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:23,411 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:03:23,411 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:03:23,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:03:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:03:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 16:03:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:03:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-12 16:03:23,417 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-10-12 16:03:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:23,417 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-12 16:03:23,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:03:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-12 16:03:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:03:23,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:23,418 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:23,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:03:23,418 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1334491759, now seen corresponding path program 53 times [2020-10-12 16:03:23,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:23,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205030743] [2020-10-12 16:03:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:26,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2600 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:03:26,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:28,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:28,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:28,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:28,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:28,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:28,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:28,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:28,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205030743] [2020-10-12 16:03:28,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:28,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:03:28,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182781587] [2020-10-12 16:03:28,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:03:28,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:28,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:03:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:03:28,365 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2020-10-12 16:03:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:30,119 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-12 16:03:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:03:30,119 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-10-12 16:03:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:30,120 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:03:30,120 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:03:30,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:03:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:03:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 16:03:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:03:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-12 16:03:30,127 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-10-12 16:03:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:30,127 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-12 16:03:30,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:03:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-12 16:03:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:03:30,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:30,128 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:30,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:03:30,129 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1616889694, now seen corresponding path program 54 times [2020-10-12 16:03:30,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:30,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384931327] [2020-10-12 16:03:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3045 [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:03:33,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:03:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:35,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:35,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:35,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:35,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:35,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:35,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:35,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384931327] [2020-10-12 16:03:35,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:35,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:03:35,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615112673] [2020-10-12 16:03:35,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:03:35,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:35,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:03:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:03:35,662 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2020-10-12 16:03:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:37,519 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-12 16:03:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:03:37,520 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2020-10-12 16:03:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:37,520 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:03:37,521 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:03:37,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:03:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:03:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 16:03:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:03:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-12 16:03:37,526 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-10-12 16:03:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:37,526 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-12 16:03:37,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:03:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-12 16:03:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:03:37,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:37,527 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:37,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:03:37,527 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565775, now seen corresponding path program 55 times [2020-10-12 16:03:37,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:37,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870659881] [2020-10-12 16:03:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:37,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:39,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:39,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:03:39,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:39,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2243 [2020-10-12 16:03:39,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:03:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:03:39,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:42,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:42,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:42,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:42,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870659881] [2020-10-12 16:03:42,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:42,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:03:42,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956118957] [2020-10-12 16:03:42,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:03:42,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:42,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:03:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:03:42,318 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2020-10-12 16:03:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:44,308 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-12 16:03:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:03:44,309 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2020-10-12 16:03:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:44,310 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:03:44,311 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 16:03:44,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:03:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 16:03:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 16:03:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:03:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-12 16:03:44,315 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-10-12 16:03:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:44,315 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-12 16:03:44,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:03:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-12 16:03:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:03:44,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:44,316 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:44,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:03:44,316 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash 219595198, now seen corresponding path program 56 times [2020-10-12 16:03:44,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:44,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810103809] [2020-10-12 16:03:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:47,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3500 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:03:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:50,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:50,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:50,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:50,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810103809] [2020-10-12 16:03:50,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:50,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:03:50,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463035593] [2020-10-12 16:03:50,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:03:50,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:50,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:03:50,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:03:50,474 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2020-10-12 16:03:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:52,518 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-12 16:03:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:03:52,519 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2020-10-12 16:03:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:52,520 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:03:52,520 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:03:52,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:03:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:03:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-12 16:03:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:03:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-12 16:03:52,525 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-10-12 16:03:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:52,525 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-12 16:03:52,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:03:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-12 16:03:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 16:03:52,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:52,526 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:52,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:03:52,527 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1746022191, now seen corresponding path program 57 times [2020-10-12 16:03:52,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:52,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079081814] [2020-10-12 16:03:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:52,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:57,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:03:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:00,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:00,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:00,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:00,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:00,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079081814] [2020-10-12 16:04:00,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:00,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:04:00,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702478505] [2020-10-12 16:04:00,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:04:00,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:04:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:04:00,240 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2020-10-12 16:04:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:02,292 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-12 16:04:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:04:02,293 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2020-10-12 16:04:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:02,294 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:04:02,294 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:04:02,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:04:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:04:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-12 16:04:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:04:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-12 16:04:02,298 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-10-12 16:04:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:02,299 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-12 16:04:02,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:04:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-12 16:04:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:04:02,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:02,299 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:02,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:04:02,300 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1744348190, now seen corresponding path program 58 times [2020-10-12 16:04:02,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:02,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885081734] [2020-10-12 16:04:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:02,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:04,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:04,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:04:04,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2468 [2020-10-12 16:04:04,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:04,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:04:04,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:04,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:04:04,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:07,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:07,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:07,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:07,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885081734] [2020-10-12 16:04:07,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:07,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:04:07,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136606332] [2020-10-12 16:04:07,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:04:07,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:04:07,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:04:07,587 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2020-10-12 16:04:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:09,715 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-12 16:04:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:04:09,715 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2020-10-12 16:04:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:09,716 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:04:09,717 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:04:09,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:04:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:04:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 16:04:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:04:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-12 16:04:09,721 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-10-12 16:04:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:09,721 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-12 16:04:09,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:04:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-12 16:04:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:04:09,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:09,722 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:09,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:04:09,723 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1723319695, now seen corresponding path program 59 times [2020-10-12 16:04:09,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:09,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970955827] [2020-10-12 16:04:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:09,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:13,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3555 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:04:13,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:16,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:16,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:16,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970955827] [2020-10-12 16:04:16,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:16,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:04:16,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613548704] [2020-10-12 16:04:16,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:04:16,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:04:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:04:16,118 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2020-10-12 16:04:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:18,280 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-12 16:04:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:04:18,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2020-10-12 16:04:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:18,282 INFO L225 Difference]: With dead ends: 76 [2020-10-12 16:04:18,282 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 16:04:18,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:04:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 16:04:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 16:04:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:04:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-12 16:04:18,287 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-10-12 16:04:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:18,287 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-12 16:04:18,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:04:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-12 16:04:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:04:18,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:18,288 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:18,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:04:18,289 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1846841730, now seen corresponding path program 60 times [2020-10-12 16:04:18,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:18,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045398737] [2020-10-12 16:04:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:23,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:23,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:04:23,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 16:04:23,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:04:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:04:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:26,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:26,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:26,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:26,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045398737] [2020-10-12 16:04:26,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:26,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:04:26,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558973249] [2020-10-12 16:04:26,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:04:26,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:04:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:04:26,335 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2020-10-12 16:04:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:28,582 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-12 16:04:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:04:28,583 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2020-10-12 16:04:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:28,584 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:04:28,585 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:04:28,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:04:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:04:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 16:04:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 16:04:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-12 16:04:28,590 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2020-10-12 16:04:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:28,591 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-12 16:04:28,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:04:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-12 16:04:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 16:04:28,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:28,592 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:28,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:04:28,592 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:28,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1381057519, now seen corresponding path program 61 times [2020-10-12 16:04:28,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:28,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954009917] [2020-10-12 16:04:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:28,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4686 [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:04:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:04:33,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:36,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:36,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:36,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:36,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:36,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954009917] [2020-10-12 16:04:36,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:36,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:04:36,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305103813] [2020-10-12 16:04:36,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:04:36,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:04:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:04:36,384 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2020-10-12 16:04:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:38,689 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-12 16:04:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 16:04:38,690 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2020-10-12 16:04:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:38,691 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:04:38,691 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:04:38,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:04:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:04:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 16:04:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:04:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-12 16:04:38,696 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2020-10-12 16:04:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:38,697 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-12 16:04:38,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:04:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-12 16:04:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:04:38,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:38,697 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:38,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:04:38,698 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash 173351134, now seen corresponding path program 62 times [2020-10-12 16:04:38,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:38,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836282533] [2020-10-12 16:04:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:38,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:43,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 16:04:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:46,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:46,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:46,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:46,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:46,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:46,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836282533] [2020-10-12 16:04:46,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:46,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:04:46,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283221202] [2020-10-12 16:04:46,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:04:46,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:04:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:04:46,932 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2020-10-12 16:04:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:49,305 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-12 16:04:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:04:49,306 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2020-10-12 16:04:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:49,307 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:04:49,307 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 16:04:49,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:04:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 16:04:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-12 16:04:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:04:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-12 16:04:49,312 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2020-10-12 16:04:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:49,313 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-12 16:04:49,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:04:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-12 16:04:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 16:04:49,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:49,314 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:49,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:04:49,314 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:49,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1115379121, now seen corresponding path program 63 times [2020-10-12 16:04:49,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:49,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131817598] [2020-10-12 16:04:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:54,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:04:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:57,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:57,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:57,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:57,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:57,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:57,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:57,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:57,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:57,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:57,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:04:57,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131817598] [2020-10-12 16:04:57,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:57,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:04:57,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851802649] [2020-10-12 16:04:57,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:04:57,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:04:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:04:57,649 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2020-10-12 16:05:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:05:00,127 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-12 16:05:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 16:05:00,128 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2020-10-12 16:05:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:05:00,129 INFO L225 Difference]: With dead ends: 80 [2020-10-12 16:05:00,129 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:05:00,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:05:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:05:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-12 16:05:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:05:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-12 16:05:00,134 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2020-10-12 16:05:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:05:00,134 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-12 16:05:00,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:05:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-12 16:05:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:05:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:05:00,135 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:05:00,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:05:00,136 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:05:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:05:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 253475646, now seen corresponding path program 64 times [2020-10-12 16:05:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:05:00,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846637593] [2020-10-12 16:05:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:05:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:05:00,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:05:05,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:05:05,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:05:05,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:05:05,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-12 16:05:05,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:05:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:05:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:05:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:05:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:05:08,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:05:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:05:08,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:05:08,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:05:08,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:05:08,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:05:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:05:08,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846637593] [2020-10-12 16:05:08,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:05:08,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:05:08,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243057885] [2020-10-12 16:05:08,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:05:08,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:05:08,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:05:08,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:05:08,591 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states.