/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:25:07,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:25:07,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:25:07,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:25:07,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:25:07,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:25:07,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:25:07,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:25:07,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:25:07,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:25:07,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:25:07,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:25:07,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:25:07,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:25:07,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:25:07,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:25:07,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:25:07,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:25:07,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:25:07,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:25:07,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:25:07,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:25:07,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:25:07,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:25:07,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:25:07,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:25:07,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:25:07,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:25:07,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:25:07,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:25:07,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:25:07,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:25:07,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:25:07,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:25:07,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:25:07,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:25:07,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:25:07,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:25:07,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:25:07,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:25:07,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:25:07,496 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 [2020-10-14 05:25:07,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:25:07,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:25:07,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:25:07,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:25:07,519 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:25:07,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:25:07,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:25:07,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:25:07,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:25:07,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:25:07,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:25:07,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:25:07,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:25:07,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:25:07,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:25:07,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:25:07,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:25:07,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:25:07,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:25:07,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:25:07,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:25:07,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:25:07,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:25:07,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:25:07,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:25:07,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:25:07,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:25:07,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:25:07,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:25:07,524 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:25:07,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:25:07,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:25:07,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:25:07,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:25:07,862 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:25:07,863 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-14 05:25:07,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19fdcd4c4/e9021bfc0cf6423a8dd52f0fc7e93d80/FLAGfe333a5dc [2020-10-14 05:25:08,388 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:25:08,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-14 05:25:08,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19fdcd4c4/e9021bfc0cf6423a8dd52f0fc7e93d80/FLAGfe333a5dc [2020-10-14 05:25:08,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19fdcd4c4/e9021bfc0cf6423a8dd52f0fc7e93d80 [2020-10-14 05:25:08,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:25:08,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:25:08,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:25:08,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:25:08,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:25:08,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:25:08" (1/1) ... [2020-10-14 05:25:08,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@291ccea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:08, skipping insertion in model container [2020-10-14 05:25:08,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:25:08" (1/1) ... [2020-10-14 05:25:08,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:25:08,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:25:09,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:25:09,031 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:25:09,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:25:09,063 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:25:09,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09 WrapperNode [2020-10-14 05:25:09,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:25:09,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:25:09,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:25:09,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:25:09,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (1/1) ... [2020-10-14 05:25:09,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:25:09,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:25:09,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:25:09,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:25:09,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (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 [2020-10-14 05:25:09,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:25:09,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:25:09,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:25:09,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:25:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:25:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:25:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:25:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:25:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:25:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:25:09,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:25:09,465 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 05:25:09,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:25:09 BoogieIcfgContainer [2020-10-14 05:25:09,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:25:09,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:25:09,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:25:09,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:25:09,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:25:08" (1/3) ... [2020-10-14 05:25:09,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6205b1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:25:09, skipping insertion in model container [2020-10-14 05:25:09,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:09" (2/3) ... [2020-10-14 05:25:09,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6205b1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:25:09, skipping insertion in model container [2020-10-14 05:25:09,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:25:09" (3/3) ... [2020-10-14 05:25:09,478 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de61.c [2020-10-14 05:25:09,490 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:25:09,497 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:25:09,516 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:25:09,551 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:25:09,551 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:25:09,551 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:25:09,551 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:25:09,552 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:25:09,552 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:25:09,552 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:25:09,552 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:25:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-14 05:25:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:25:09,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:09,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:09,589 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash -858988731, now seen corresponding path program 1 times [2020-10-14 05:25:09,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:09,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891110789] [2020-10-14 05:25:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:10,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:25:10,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-14 05:25:10,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:10,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:10,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:25:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:10,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:10,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:10,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:10,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:10,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:10,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:10,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:10,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:10,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:10,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:10,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891110789] [2020-10-14 05:25:10,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:10,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:25:10,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671303074] [2020-10-14 05:25:10,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:25:10,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:10,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:25:10,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:25:10,465 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-10-14 05:25:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:10,490 INFO L93 Difference]: Finished difference Result 42 states and 65 transitions. [2020-10-14 05:25:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:25:10,493 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-10-14 05:25:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:10,502 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:25:10,502 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:25:10,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:25:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:25:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:25:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:25:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-10-14 05:25:10,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2020-10-14 05:25:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:10,549 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-10-14 05:25:10,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:25:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-10-14 05:25:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:25:10,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:10,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:10,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:25:10,551 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash -114036159, now seen corresponding path program 1 times [2020-10-14 05:25:10,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:10,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980403743] [2020-10-14 05:25:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:25:11,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:11,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-14 05:25:11,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:11,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:11,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:11,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:11,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:11,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:11,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:11,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:11,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980403743] [2020-10-14 05:25:11,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:11,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:25:11,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123423993] [2020-10-14 05:25:11,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:11,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:11,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:11,277 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 7 states. [2020-10-14 05:25:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:11,500 INFO L93 Difference]: Finished difference Result 50 states and 75 transitions. [2020-10-14 05:25:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:11,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-14 05:25:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:11,503 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:25:11,504 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:25:11,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:25:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-14 05:25:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:25:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-10-14 05:25:11,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 16 [2020-10-14 05:25:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:11,515 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-10-14 05:25:11,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2020-10-14 05:25:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:25:11,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:11,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:11,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:25:11,517 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash 795384167, now seen corresponding path program 1 times [2020-10-14 05:25:11,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:11,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105661500] [2020-10-14 05:25:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:25:11,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-14 05:25:11,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:25:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:11,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:11,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:11,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:11,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:11,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:11,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:11,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105661500] [2020-10-14 05:25:11,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:11,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:25:11,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394299064] [2020-10-14 05:25:11,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:25:11,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:11,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:25:11,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:25:11,691 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand 3 states. [2020-10-14 05:25:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:11,724 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-10-14 05:25:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:25:11,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 05:25:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:11,729 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:25:11,729 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:25:11,730 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 [2020-10-14 05:25:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:25:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:25:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:25:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-14 05:25:11,745 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2020-10-14 05:25:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:11,746 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-14 05:25:11,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:25:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-14 05:25:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:25:11,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:11,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:11,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:25:11,748 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash -507749048, now seen corresponding path program 1 times [2020-10-14 05:25:11,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:11,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671323340] [2020-10-14 05:25:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:25:12,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-14 05:25:12,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:25:12,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:12,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:12,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:12,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:12,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:12,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:12,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671323340] [2020-10-14 05:25:12,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:12,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:12,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620311904] [2020-10-14 05:25:12,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:12,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:12,201 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 4 states. [2020-10-14 05:25:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:12,283 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-10-14 05:25:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:12,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:25:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:12,287 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:25:12,287 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:25:12,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:25:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-14 05:25:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:25:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2020-10-14 05:25:12,295 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2020-10-14 05:25:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:12,296 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2020-10-14 05:25:12,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2020-10-14 05:25:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:25:12,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:12,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:12,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:25:12,297 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:12,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1040988895, now seen corresponding path program 1 times [2020-10-14 05:25:12,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:12,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121516784] [2020-10-14 05:25:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:25:12,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:25:12,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:25:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:25:12,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:12,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:12,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:12,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:12,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:12,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:12,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:25:12,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121516784] [2020-10-14 05:25:12,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:12,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:25:12,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721908913] [2020-10-14 05:25:12,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:25:12,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:25:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:25:12,465 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 3 states. [2020-10-14 05:25:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:12,489 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-10-14 05:25:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:25:12,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-14 05:25:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:12,491 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:25:12,491 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:25:12,492 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 [2020-10-14 05:25:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:25:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-14 05:25:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:25:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2020-10-14 05:25:12,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 18 [2020-10-14 05:25:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:12,500 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2020-10-14 05:25:12,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:25:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2020-10-14 05:25:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:25:12,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:12,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:12,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:25:12,501 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:12,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:12,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1380584497, now seen corresponding path program 1 times [2020-10-14 05:25:12,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:12,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548508372] [2020-10-14 05:25:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:25:12,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:25:12,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-14 05:25:12,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:12,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:12,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:12,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:12,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:12,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:25:12,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548508372] [2020-10-14 05:25:12,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:12,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:12,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972227214] [2020-10-14 05:25:12,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:12,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:12,907 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand 5 states. [2020-10-14 05:25:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:13,023 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2020-10-14 05:25:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:13,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:25:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:13,025 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:25:13,025 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:25:13,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:25:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-14 05:25:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:25:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2020-10-14 05:25:13,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2020-10-14 05:25:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:13,033 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2020-10-14 05:25:13,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2020-10-14 05:25:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:25:13,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:13,034 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:13,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:25:13,035 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash 172053281, now seen corresponding path program 2 times [2020-10-14 05:25:13,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:13,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968050896] [2020-10-14 05:25:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:25:13,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-14 05:25:13,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:13,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:13,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:13,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:13,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:13,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:13,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:13,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:13,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:13,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968050896] [2020-10-14 05:25:13,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:13,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:13,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132673425] [2020-10-14 05:25:13,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:13,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:13,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:13,461 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 5 states. [2020-10-14 05:25:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:13,536 INFO L93 Difference]: Finished difference Result 77 states and 116 transitions. [2020-10-14 05:25:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:13,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:25:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:13,538 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:25:13,538 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:25:13,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:25:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-10-14 05:25:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:25:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 85 transitions. [2020-10-14 05:25:13,547 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 85 transitions. Word has length 18 [2020-10-14 05:25:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:13,547 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 85 transitions. [2020-10-14 05:25:13,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 85 transitions. [2020-10-14 05:25:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:25:13,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:13,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:13,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:25:13,549 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1029509497, now seen corresponding path program 1 times [2020-10-14 05:25:13,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:13,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773986392] [2020-10-14 05:25:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:25:13,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:13,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-14 05:25:13,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:25:13,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:13,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:13,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:13,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:13,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:13,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:13,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773986392] [2020-10-14 05:25:13,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:13,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:13,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817819143] [2020-10-14 05:25:13,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:13,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:13,694 INFO L87 Difference]: Start difference. First operand 59 states and 85 transitions. Second operand 4 states. [2020-10-14 05:25:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:13,756 INFO L93 Difference]: Finished difference Result 77 states and 110 transitions. [2020-10-14 05:25:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:13,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:25:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:13,758 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:25:13,758 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:25:13,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:25:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-14 05:25:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:25:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2020-10-14 05:25:13,765 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 19 [2020-10-14 05:25:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:13,766 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2020-10-14 05:25:13,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2020-10-14 05:25:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:25:13,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:13,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:13,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:25:13,767 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1589919752, now seen corresponding path program 1 times [2020-10-14 05:25:13,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:13,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994213389] [2020-10-14 05:25:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:25:14,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:14,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-14 05:25:14,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:14,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:14,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:14,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:14,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:14,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:25:14,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994213389] [2020-10-14 05:25:14,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:14,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:14,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007791263] [2020-10-14 05:25:14,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:14,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:14,195 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 5 states. [2020-10-14 05:25:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:14,288 INFO L93 Difference]: Finished difference Result 67 states and 94 transitions. [2020-10-14 05:25:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:14,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 05:25:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:14,290 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:25:14,290 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:25:14,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:25:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-14 05:25:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:25:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2020-10-14 05:25:14,297 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 19 [2020-10-14 05:25:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:14,298 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2020-10-14 05:25:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2020-10-14 05:25:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:25:14,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:14,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:14,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:25:14,299 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash 587060503, now seen corresponding path program 1 times [2020-10-14 05:25:14,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028395052] [2020-10-14 05:25:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:25:14,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:14,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-14 05:25:14,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:14,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:14,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:14,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:14,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:14,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:25:14,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028395052] [2020-10-14 05:25:14,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:14,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:14,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171968374] [2020-10-14 05:25:14,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:14,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:14,698 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand 4 states. [2020-10-14 05:25:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:14,751 INFO L93 Difference]: Finished difference Result 90 states and 130 transitions. [2020-10-14 05:25:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:14,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:25:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:14,753 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:25:14,754 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:25:14,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:25:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-14 05:25:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:25:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2020-10-14 05:25:14,761 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 19 [2020-10-14 05:25:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:14,762 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2020-10-14 05:25:14,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2020-10-14 05:25:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:25:14,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:14,763 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:14,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:25:14,763 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash -228911000, now seen corresponding path program 3 times [2020-10-14 05:25:14,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:14,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045940218] [2020-10-14 05:25:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:25:15,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-14 05:25:15,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:15,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:15,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:15,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:15,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:15,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:15,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:15,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:15,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045940218] [2020-10-14 05:25:15,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:15,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:15,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973058912] [2020-10-14 05:25:15,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:15,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:15,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:15,259 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 6 states. [2020-10-14 05:25:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:15,356 INFO L93 Difference]: Finished difference Result 118 states and 177 transitions. [2020-10-14 05:25:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:15,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-14 05:25:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:15,358 INFO L225 Difference]: With dead ends: 118 [2020-10-14 05:25:15,358 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:25:15,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:25:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-14 05:25:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:25:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-10-14 05:25:15,367 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 19 [2020-10-14 05:25:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:15,367 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-10-14 05:25:15,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-10-14 05:25:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:15,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:15,369 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:15,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:25:15,369 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -813729041, now seen corresponding path program 2 times [2020-10-14 05:25:15,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:15,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35426041] [2020-10-14 05:25:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:15,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:15,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-14 05:25:15,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:15,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:15,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:25:15,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:15,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:15,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:15,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:15,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:15,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:15,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:15,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:25:15,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35426041] [2020-10-14 05:25:15,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:15,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:15,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161025904] [2020-10-14 05:25:15,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:15,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:15,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:15,551 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 4 states. [2020-10-14 05:25:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:15,606 INFO L93 Difference]: Finished difference Result 121 states and 176 transitions. [2020-10-14 05:25:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:15,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 05:25:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:15,608 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:25:15,608 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:25:15,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:25:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-14 05:25:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:25:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2020-10-14 05:25:15,617 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 20 [2020-10-14 05:25:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:15,617 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2020-10-14 05:25:15,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2020-10-14 05:25:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:15,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:15,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:15,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:25:15,619 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2081296833, now seen corresponding path program 2 times [2020-10-14 05:25:15,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:15,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887473349] [2020-10-14 05:25:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:16,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:16,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:25:16,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-14 05:25:16,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:16,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:25:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:16,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:16,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:16,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:16,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:16,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:16,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:25:16,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887473349] [2020-10-14 05:25:16,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:16,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:16,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314751282] [2020-10-14 05:25:16,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:16,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:16,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:16,301 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 5 states. [2020-10-14 05:25:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:16,364 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2020-10-14 05:25:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:16,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:25:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:16,367 INFO L225 Difference]: With dead ends: 119 [2020-10-14 05:25:16,367 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:25:16,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:16,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:25:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-10-14 05:25:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:25:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-10-14 05:25:16,375 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2020-10-14 05:25:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:16,376 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-10-14 05:25:16,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-10-14 05:25:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:16,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:16,377 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:16,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:25:16,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash 226098177, now seen corresponding path program 4 times [2020-10-14 05:25:16,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:16,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382401546] [2020-10-14 05:25:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:16,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:16,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:16,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-14 05:25:16,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:16,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:17,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:17,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:17,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:17,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382401546] [2020-10-14 05:25:17,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:17,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:17,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419431167] [2020-10-14 05:25:17,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:17,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:17,040 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 7 states. [2020-10-14 05:25:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:17,185 INFO L93 Difference]: Finished difference Result 166 states and 243 transitions. [2020-10-14 05:25:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:17,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:25:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:17,187 INFO L225 Difference]: With dead ends: 166 [2020-10-14 05:25:17,187 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 05:25:17,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 05:25:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2020-10-14 05:25:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 05:25:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 181 transitions. [2020-10-14 05:25:17,197 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 181 transitions. Word has length 20 [2020-10-14 05:25:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:17,197 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 181 transitions. [2020-10-14 05:25:17,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 181 transitions. [2020-10-14 05:25:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:17,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:17,199 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:17,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:25:17,199 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:17,200 INFO L82 PathProgramCache]: Analyzing trace with hash -716359928, now seen corresponding path program 1 times [2020-10-14 05:25:17,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:17,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483290264] [2020-10-14 05:25:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:17,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:17,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-14 05:25:17,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:17,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:17,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:17,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:17,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:17,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:17,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:17,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:17,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:17,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:17,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:17,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:17,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483290264] [2020-10-14 05:25:17,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:17,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:17,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587593833] [2020-10-14 05:25:17,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:17,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:17,659 INFO L87 Difference]: Start difference. First operand 131 states and 181 transitions. Second operand 6 states. [2020-10-14 05:25:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:17,820 INFO L93 Difference]: Finished difference Result 167 states and 228 transitions. [2020-10-14 05:25:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:17,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 05:25:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:17,822 INFO L225 Difference]: With dead ends: 167 [2020-10-14 05:25:17,822 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 05:25:17,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 05:25:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2020-10-14 05:25:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 05:25:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 181 transitions. [2020-10-14 05:25:17,829 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 181 transitions. Word has length 21 [2020-10-14 05:25:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:17,829 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 181 transitions. [2020-10-14 05:25:17,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 181 transitions. [2020-10-14 05:25:17,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:17,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:17,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:17,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:25:17,831 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1534058582, now seen corresponding path program 3 times [2020-10-14 05:25:17,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:17,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421504594] [2020-10-14 05:25:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:18,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:18,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-14 05:25:18,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:18,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:18,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:25:18,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:18,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:18,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:18,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:18,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421504594] [2020-10-14 05:25:18,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:18,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:25:18,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275544845] [2020-10-14 05:25:18,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:18,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:18,338 INFO L87 Difference]: Start difference. First operand 131 states and 181 transitions. Second operand 4 states. [2020-10-14 05:25:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:18,403 INFO L93 Difference]: Finished difference Result 147 states and 201 transitions. [2020-10-14 05:25:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:18,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 05:25:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:18,405 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:25:18,405 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 05:25:18,406 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 [2020-10-14 05:25:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 05:25:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2020-10-14 05:25:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:25:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2020-10-14 05:25:18,412 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 155 transitions. Word has length 21 [2020-10-14 05:25:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:18,412 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 155 transitions. [2020-10-14 05:25:18,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 155 transitions. [2020-10-14 05:25:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:18,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:18,414 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:18,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:25:18,414 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1446480776, now seen corresponding path program 5 times [2020-10-14 05:25:18,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:18,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094426843] [2020-10-14 05:25:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:19,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:19,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:19,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-14 05:25:19,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:19,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:19,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:19,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:19,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:19,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:19,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:19,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:19,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:19,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094426843] [2020-10-14 05:25:19,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:19,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:19,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868963989] [2020-10-14 05:25:19,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:19,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:19,315 INFO L87 Difference]: Start difference. First operand 113 states and 155 transitions. Second operand 8 states. [2020-10-14 05:25:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:19,501 INFO L93 Difference]: Finished difference Result 185 states and 269 transitions. [2020-10-14 05:25:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:19,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-14 05:25:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:19,503 INFO L225 Difference]: With dead ends: 185 [2020-10-14 05:25:19,503 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 05:25:19,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 05:25:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 128. [2020-10-14 05:25:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 05:25:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2020-10-14 05:25:19,513 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 21 [2020-10-14 05:25:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:19,513 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2020-10-14 05:25:19,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2020-10-14 05:25:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:19,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:19,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:19,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:25:19,517 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1687642270, now seen corresponding path program 1 times [2020-10-14 05:25:19,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:19,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173014981] [2020-10-14 05:25:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:20,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:20,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-14 05:25:20,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:20,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:25:20,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:20,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:20,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:20,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:20,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:20,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:20,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:20,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173014981] [2020-10-14 05:25:20,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:20,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:20,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129952991] [2020-10-14 05:25:20,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:20,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:20,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:20,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:20,835 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand 11 states. [2020-10-14 05:25:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:21,285 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2020-10-14 05:25:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:21,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 05:25:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:21,287 INFO L225 Difference]: With dead ends: 148 [2020-10-14 05:25:21,287 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 05:25:21,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 05:25:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 05:25:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 05:25:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2020-10-14 05:25:21,295 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 22 [2020-10-14 05:25:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:21,295 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2020-10-14 05:25:21,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2020-10-14 05:25:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:21,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:21,297 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:21,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:25:21,297 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash 623635681, now seen corresponding path program 6 times [2020-10-14 05:25:21,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:21,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732550147] [2020-10-14 05:25:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:22,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:22,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:22,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-14 05:25:22,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:22,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:22,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:22,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:22,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:22,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:22,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:22,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:22,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:22,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:22,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:22,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:22,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732550147] [2020-10-14 05:25:22,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:22,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:22,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102493980] [2020-10-14 05:25:22,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:22,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:22,619 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand 9 states. [2020-10-14 05:25:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:22,922 INFO L93 Difference]: Finished difference Result 181 states and 270 transitions. [2020-10-14 05:25:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:22,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 05:25:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:22,924 INFO L225 Difference]: With dead ends: 181 [2020-10-14 05:25:22,924 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 05:25:22,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 05:25:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 119. [2020-10-14 05:25:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 05:25:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2020-10-14 05:25:22,933 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 22 [2020-10-14 05:25:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:22,934 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2020-10-14 05:25:22,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2020-10-14 05:25:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:22,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:22,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:22,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:25:22,935 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2095055766, now seen corresponding path program 2 times [2020-10-14 05:25:22,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:22,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086580109] [2020-10-14 05:25:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:23,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:23,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:23,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-14 05:25:23,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:23,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:23,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:23,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:23,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:23,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:23,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:23,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:23,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:23,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:23,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:23,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:23,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:23,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:23,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:23,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:25:23,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086580109] [2020-10-14 05:25:23,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:23,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:23,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299367576] [2020-10-14 05:25:23,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:23,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:23,446 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand 5 states. [2020-10-14 05:25:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:23,597 INFO L93 Difference]: Finished difference Result 204 states and 295 transitions. [2020-10-14 05:25:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:23,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-14 05:25:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:23,600 INFO L225 Difference]: With dead ends: 204 [2020-10-14 05:25:23,600 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 05:25:23,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 05:25:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 126. [2020-10-14 05:25:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 05:25:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-10-14 05:25:23,610 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 23 [2020-10-14 05:25:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:23,610 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-10-14 05:25:23,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-10-14 05:25:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:23,611 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:23,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:25:23,612 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash 885241512, now seen corresponding path program 7 times [2020-10-14 05:25:23,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:23,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701436277] [2020-10-14 05:25:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:23,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:24,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:24,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1239 [2020-10-14 05:25:24,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:24,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:24,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:25:24,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:24,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:24,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:24,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:24,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:24,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:24,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:24,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701436277] [2020-10-14 05:25:24,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:24,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:24,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849856643] [2020-10-14 05:25:24,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:24,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:24,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:24,996 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 10 states. [2020-10-14 05:25:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:25,305 INFO L93 Difference]: Finished difference Result 210 states and 317 transitions. [2020-10-14 05:25:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:25,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 05:25:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:25,308 INFO L225 Difference]: With dead ends: 210 [2020-10-14 05:25:25,308 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 05:25:25,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 05:25:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-10-14 05:25:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:25:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 200 transitions. [2020-10-14 05:25:25,324 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 200 transitions. Word has length 23 [2020-10-14 05:25:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:25,324 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 200 transitions. [2020-10-14 05:25:25,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 200 transitions. [2020-10-14 05:25:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:25,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:25,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:25,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:25:25,326 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:25,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1206137582, now seen corresponding path program 2 times [2020-10-14 05:25:25,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:25,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629905838] [2020-10-14 05:25:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:25,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:26,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:26,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:26,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1073 [2020-10-14 05:25:26,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:26,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:26,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:26,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:26,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:26,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:26,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:26,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:26,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:26,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:26,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:26,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:26,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:26,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:26,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629905838] [2020-10-14 05:25:26,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:26,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:26,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119992863] [2020-10-14 05:25:26,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:26,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:26,475 INFO L87 Difference]: Start difference. First operand 139 states and 200 transitions. Second operand 5 states. [2020-10-14 05:25:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:26,613 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2020-10-14 05:25:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:26,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 05:25:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:26,617 INFO L225 Difference]: With dead ends: 210 [2020-10-14 05:25:26,617 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 05:25:26,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 05:25:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 148. [2020-10-14 05:25:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 05:25:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2020-10-14 05:25:26,632 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 24 [2020-10-14 05:25:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:26,632 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2020-10-14 05:25:26,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2020-10-14 05:25:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:26,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:26,635 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:26,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:25:26,635 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:26,635 INFO L82 PathProgramCache]: Analyzing trace with hash 405087681, now seen corresponding path program 8 times [2020-10-14 05:25:26,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:26,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924320997] [2020-10-14 05:25:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:26,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:28,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:28,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:28,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1678 [2020-10-14 05:25:28,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:28,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:25:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:25:28,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:28,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:28,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:28,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:28,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:28,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:28,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:25:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:25:28,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924320997] [2020-10-14 05:25:28,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:28,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:28,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316290755] [2020-10-14 05:25:28,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:28,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:28,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:28,507 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand 9 states. [2020-10-14 05:25:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:28,760 INFO L93 Difference]: Finished difference Result 160 states and 220 transitions. [2020-10-14 05:25:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:28,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:25:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:28,762 INFO L225 Difference]: With dead ends: 160 [2020-10-14 05:25:28,763 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 05:25:28,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 05:25:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2020-10-14 05:25:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 05:25:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 201 transitions. [2020-10-14 05:25:28,779 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 201 transitions. Word has length 24 [2020-10-14 05:25:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:28,779 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 201 transitions. [2020-10-14 05:25:28,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 201 transitions. [2020-10-14 05:25:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:28,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:28,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:28,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:25:28,782 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1837985831, now seen corresponding path program 3 times [2020-10-14 05:25:28,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:28,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067928220] [2020-10-14 05:25:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:28,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:29,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:29,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:29,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-14 05:25:29,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:29,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:29,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:29,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:29,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:29,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:29,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:29,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:29,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:29,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:29,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:29,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:29,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067928220] [2020-10-14 05:25:29,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:29,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:29,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21942098] [2020-10-14 05:25:29,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:29,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:29,690 INFO L87 Difference]: Start difference. First operand 142 states and 201 transitions. Second operand 8 states. [2020-10-14 05:25:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:29,926 INFO L93 Difference]: Finished difference Result 218 states and 295 transitions. [2020-10-14 05:25:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:29,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 05:25:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:29,928 INFO L225 Difference]: With dead ends: 218 [2020-10-14 05:25:29,928 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 05:25:29,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 05:25:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 164. [2020-10-14 05:25:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 05:25:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 232 transitions. [2020-10-14 05:25:29,950 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 232 transitions. Word has length 25 [2020-10-14 05:25:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:29,950 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 232 transitions. [2020-10-14 05:25:29,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 232 transitions. [2020-10-14 05:25:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:29,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:29,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:29,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:25:29,952 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1184946631, now seen corresponding path program 3 times [2020-10-14 05:25:29,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:29,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530524036] [2020-10-14 05:25:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:30,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:30,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:30,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:30,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:30,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-14 05:25:30,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:30,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:30,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:31,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:31,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:31,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:31,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:31,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:31,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:31,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:31,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:31,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530524036] [2020-10-14 05:25:31,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:31,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:31,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3316914] [2020-10-14 05:25:31,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:31,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:31,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:31,065 INFO L87 Difference]: Start difference. First operand 164 states and 232 transitions. Second operand 8 states. [2020-10-14 05:25:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:31,250 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2020-10-14 05:25:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:31,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 05:25:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:31,252 INFO L225 Difference]: With dead ends: 231 [2020-10-14 05:25:31,252 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 05:25:31,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 05:25:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2020-10-14 05:25:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 05:25:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 219 transitions. [2020-10-14 05:25:31,269 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 219 transitions. Word has length 25 [2020-10-14 05:25:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:31,270 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 219 transitions. [2020-10-14 05:25:31,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 219 transitions. [2020-10-14 05:25:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:31,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:31,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:31,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:25:31,271 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:31,272 INFO L82 PathProgramCache]: Analyzing trace with hash -451903817, now seen corresponding path program 1 times [2020-10-14 05:25:31,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:31,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19594090] [2020-10-14 05:25:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:31,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:32,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:32,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-14 05:25:32,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:32,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:32,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:32,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:32,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:32,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:32,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:32,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:32,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:32,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 05:25:32,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19594090] [2020-10-14 05:25:32,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:32,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:32,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140790707] [2020-10-14 05:25:32,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:32,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:32,291 INFO L87 Difference]: Start difference. First operand 156 states and 219 transitions. Second operand 8 states. [2020-10-14 05:25:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:32,661 INFO L93 Difference]: Finished difference Result 218 states and 304 transitions. [2020-10-14 05:25:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:32,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 05:25:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:32,665 INFO L225 Difference]: With dead ends: 218 [2020-10-14 05:25:32,665 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 05:25:32,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 05:25:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 171. [2020-10-14 05:25:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-14 05:25:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 243 transitions. [2020-10-14 05:25:32,688 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 243 transitions. Word has length 25 [2020-10-14 05:25:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:32,689 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 243 transitions. [2020-10-14 05:25:32,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 243 transitions. [2020-10-14 05:25:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:32,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:32,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:32,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:25:32,692 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1140389801, now seen corresponding path program 2 times [2020-10-14 05:25:32,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:32,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591617584] [2020-10-14 05:25:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:34,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-14 05:25:34,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:34,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:34,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:34,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:34,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:34,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:34,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:34,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:34,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591617584] [2020-10-14 05:25:34,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:34,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:34,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191243657] [2020-10-14 05:25:34,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:34,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:34,132 INFO L87 Difference]: Start difference. First operand 171 states and 243 transitions. Second operand 6 states. [2020-10-14 05:25:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:34,382 INFO L93 Difference]: Finished difference Result 312 states and 439 transitions. [2020-10-14 05:25:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:34,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-14 05:25:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:34,384 INFO L225 Difference]: With dead ends: 312 [2020-10-14 05:25:34,384 INFO L226 Difference]: Without dead ends: 305 [2020-10-14 05:25:34,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-14 05:25:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 179. [2020-10-14 05:25:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 05:25:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 256 transitions. [2020-10-14 05:25:34,407 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 256 transitions. Word has length 25 [2020-10-14 05:25:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:34,409 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 256 transitions. [2020-10-14 05:25:34,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 256 transitions. [2020-10-14 05:25:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:34,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:34,410 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:34,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:25:34,410 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:34,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:34,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1716531122, now seen corresponding path program 4 times [2020-10-14 05:25:34,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:34,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253674937] [2020-10-14 05:25:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:34,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-14 05:25:34,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:34,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:34,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:34,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:34,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:34,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:34,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:34,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253674937] [2020-10-14 05:25:34,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:34,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:34,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675291351] [2020-10-14 05:25:34,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:34,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:34,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:34,973 INFO L87 Difference]: Start difference. First operand 179 states and 256 transitions. Second operand 5 states. [2020-10-14 05:25:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:35,047 INFO L93 Difference]: Finished difference Result 272 states and 368 transitions. [2020-10-14 05:25:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:35,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 05:25:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:35,050 INFO L225 Difference]: With dead ends: 272 [2020-10-14 05:25:35,050 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 05:25:35,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 05:25:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 172. [2020-10-14 05:25:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 05:25:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 239 transitions. [2020-10-14 05:25:35,071 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 239 transitions. Word has length 26 [2020-10-14 05:25:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:35,072 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 239 transitions. [2020-10-14 05:25:35,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 239 transitions. [2020-10-14 05:25:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:35,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:35,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:35,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:25:35,073 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash -731982783, now seen corresponding path program 5 times [2020-10-14 05:25:35,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:35,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011009187] [2020-10-14 05:25:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:35,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:35,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:35,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-14 05:25:35,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:35,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:35,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:35,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:35,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:35,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:35,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:35,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:35,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 05:25:35,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011009187] [2020-10-14 05:25:35,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:35,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:35,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564098604] [2020-10-14 05:25:35,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:35,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:35,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:35,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:35,290 INFO L87 Difference]: Start difference. First operand 172 states and 239 transitions. Second operand 5 states. [2020-10-14 05:25:35,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:35,418 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2020-10-14 05:25:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:35,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 05:25:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:35,420 INFO L225 Difference]: With dead ends: 267 [2020-10-14 05:25:35,420 INFO L226 Difference]: Without dead ends: 251 [2020-10-14 05:25:35,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-14 05:25:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 181. [2020-10-14 05:25:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 05:25:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 248 transitions. [2020-10-14 05:25:35,446 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 248 transitions. Word has length 26 [2020-10-14 05:25:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:35,447 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 248 transitions. [2020-10-14 05:25:35,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 248 transitions. [2020-10-14 05:25:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:35,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:35,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:35,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:25:35,448 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -550571230, now seen corresponding path program 6 times [2020-10-14 05:25:35,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:35,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348509127] [2020-10-14 05:25:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:36,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:36,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:25:36,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-14 05:25:36,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:36,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:36,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:36,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:37,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:37,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:37,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:37,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:37,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:37,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:37,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:37,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:37,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:37,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:37,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348509127] [2020-10-14 05:25:37,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:37,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:37,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676162672] [2020-10-14 05:25:37,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:37,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:37,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:37,092 INFO L87 Difference]: Start difference. First operand 181 states and 248 transitions. Second operand 7 states. [2020-10-14 05:25:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:37,221 INFO L93 Difference]: Finished difference Result 357 states and 509 transitions. [2020-10-14 05:25:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:37,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-14 05:25:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:37,224 INFO L225 Difference]: With dead ends: 357 [2020-10-14 05:25:37,224 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 05:25:37,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 05:25:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 244. [2020-10-14 05:25:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-14 05:25:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 328 transitions. [2020-10-14 05:25:37,256 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 328 transitions. Word has length 26 [2020-10-14 05:25:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:37,256 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 328 transitions. [2020-10-14 05:25:37,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 328 transitions. [2020-10-14 05:25:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:37,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:37,258 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:37,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:25:37,259 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1466526278, now seen corresponding path program 1 times [2020-10-14 05:25:37,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:37,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285589085] [2020-10-14 05:25:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:37,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:37,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:37,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-14 05:25:37,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:37,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:25:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:37,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:37,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:37,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:37,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:37,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:37,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:37,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:38,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:38,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:38,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:38,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:38,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:25:38,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285589085] [2020-10-14 05:25:38,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:38,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:38,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116685921] [2020-10-14 05:25:38,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:38,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:38,005 INFO L87 Difference]: Start difference. First operand 244 states and 328 transitions. Second operand 4 states. [2020-10-14 05:25:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:38,068 INFO L93 Difference]: Finished difference Result 272 states and 362 transitions. [2020-10-14 05:25:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:38,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-14 05:25:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:38,070 INFO L225 Difference]: With dead ends: 272 [2020-10-14 05:25:38,070 INFO L226 Difference]: Without dead ends: 267 [2020-10-14 05:25:38,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-14 05:25:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 248. [2020-10-14 05:25:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-14 05:25:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 333 transitions. [2020-10-14 05:25:38,094 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 333 transitions. Word has length 27 [2020-10-14 05:25:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:38,094 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 333 transitions. [2020-10-14 05:25:38,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 333 transitions. [2020-10-14 05:25:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:38,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:38,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:38,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:25:38,096 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -576518495, now seen corresponding path program 7 times [2020-10-14 05:25:38,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:38,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764785077] [2020-10-14 05:25:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:38,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:39,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:39,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-14 05:25:39,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:39,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:39,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:25:39,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:39,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:39,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:39,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:25:39,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764785077] [2020-10-14 05:25:39,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:39,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:39,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081651009] [2020-10-14 05:25:39,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:39,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:39,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:39,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:39,422 INFO L87 Difference]: Start difference. First operand 248 states and 333 transitions. Second operand 11 states. [2020-10-14 05:25:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:39,909 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2020-10-14 05:25:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:25:39,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:25:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:39,911 INFO L225 Difference]: With dead ends: 290 [2020-10-14 05:25:39,911 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 05:25:39,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:25:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 05:25:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2020-10-14 05:25:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 05:25:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 311 transitions. [2020-10-14 05:25:39,931 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 311 transitions. Word has length 28 [2020-10-14 05:25:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:39,932 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 311 transitions. [2020-10-14 05:25:39,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 311 transitions. [2020-10-14 05:25:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:39,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:39,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:39,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:25:39,934 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash 355602882, now seen corresponding path program 8 times [2020-10-14 05:25:39,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:39,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86164043] [2020-10-14 05:25:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:41,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:41,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:41,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-14 05:25:41,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:41,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:41,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:41,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:41,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:41,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:41,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:41,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 05:25:41,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86164043] [2020-10-14 05:25:41,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:41,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:41,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545713505] [2020-10-14 05:25:41,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:41,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:41,169 INFO L87 Difference]: Start difference. First operand 233 states and 311 transitions. Second operand 8 states. [2020-10-14 05:25:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:41,340 INFO L93 Difference]: Finished difference Result 301 states and 387 transitions. [2020-10-14 05:25:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:41,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 05:25:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:41,343 INFO L225 Difference]: With dead ends: 301 [2020-10-14 05:25:41,344 INFO L226 Difference]: Without dead ends: 242 [2020-10-14 05:25:41,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-14 05:25:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 233. [2020-10-14 05:25:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 05:25:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 310 transitions. [2020-10-14 05:25:41,365 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 310 transitions. Word has length 28 [2020-10-14 05:25:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:41,365 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 310 transitions. [2020-10-14 05:25:41,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 310 transitions. [2020-10-14 05:25:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:41,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:41,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:41,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:25:41,367 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1915796690, now seen corresponding path program 9 times [2020-10-14 05:25:41,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:41,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880950273] [2020-10-14 05:25:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:43,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:43,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:25:43,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2393 [2020-10-14 05:25:43,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:43,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:43,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:43,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:25:43,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:43,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:43,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:43,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:43,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:43,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:43,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:43,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:43,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:43,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:25:43,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880950273] [2020-10-14 05:25:43,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:43,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:43,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175227705] [2020-10-14 05:25:43,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:43,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:43,882 INFO L87 Difference]: Start difference. First operand 233 states and 310 transitions. Second operand 8 states. [2020-10-14 05:25:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:44,082 INFO L93 Difference]: Finished difference Result 371 states and 521 transitions. [2020-10-14 05:25:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:44,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 05:25:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:44,087 INFO L225 Difference]: With dead ends: 371 [2020-10-14 05:25:44,087 INFO L226 Difference]: Without dead ends: 348 [2020-10-14 05:25:44,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-14 05:25:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 279. [2020-10-14 05:25:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 05:25:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 369 transitions. [2020-10-14 05:25:44,113 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 369 transitions. Word has length 28 [2020-10-14 05:25:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:44,114 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 369 transitions. [2020-10-14 05:25:44,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 369 transitions. [2020-10-14 05:25:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:44,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:44,115 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:44,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:25:44,116 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:44,116 INFO L82 PathProgramCache]: Analyzing trace with hash -845598944, now seen corresponding path program 2 times [2020-10-14 05:25:44,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:44,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928785338] [2020-10-14 05:25:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:44,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:45,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:45,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:25:45,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-14 05:25:45,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:45,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:25:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:45,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:45,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:45,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:45,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:45,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:45,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:45,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:45,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:45,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:25:45,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928785338] [2020-10-14 05:25:45,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:45,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:45,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236228743] [2020-10-14 05:25:45,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:45,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:45,796 INFO L87 Difference]: Start difference. First operand 279 states and 369 transitions. Second operand 4 states. [2020-10-14 05:25:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:45,849 INFO L93 Difference]: Finished difference Result 461 states and 611 transitions. [2020-10-14 05:25:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:45,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-14 05:25:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:45,854 INFO L225 Difference]: With dead ends: 461 [2020-10-14 05:25:45,854 INFO L226 Difference]: Without dead ends: 375 [2020-10-14 05:25:45,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-14 05:25:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 315. [2020-10-14 05:25:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-14 05:25:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 407 transitions. [2020-10-14 05:25:45,872 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 407 transitions. Word has length 28 [2020-10-14 05:25:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:45,873 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 407 transitions. [2020-10-14 05:25:45,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 407 transitions. [2020-10-14 05:25:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:45,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:45,874 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:45,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:25:45,875 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1746787838, now seen corresponding path program 10 times [2020-10-14 05:25:45,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:45,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092961149] [2020-10-14 05:25:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:45,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:47,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:47,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-14 05:25:47,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:47,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:25:47,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:47,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:47,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:47,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:47,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:47,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092961149] [2020-10-14 05:25:47,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:47,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:47,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237230757] [2020-10-14 05:25:47,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:47,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:47,288 INFO L87 Difference]: Start difference. First operand 315 states and 407 transitions. Second operand 11 states. [2020-10-14 05:25:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:47,652 INFO L93 Difference]: Finished difference Result 497 states and 676 transitions. [2020-10-14 05:25:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:47,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:25:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:47,656 INFO L225 Difference]: With dead ends: 497 [2020-10-14 05:25:47,657 INFO L226 Difference]: Without dead ends: 427 [2020-10-14 05:25:47,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-14 05:25:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 338. [2020-10-14 05:25:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-14 05:25:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 440 transitions. [2020-10-14 05:25:47,679 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 440 transitions. Word has length 28 [2020-10-14 05:25:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:47,679 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 440 transitions. [2020-10-14 05:25:47,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 440 transitions. [2020-10-14 05:25:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:25:47,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:47,681 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:47,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:25:47,682 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1191477528, now seen corresponding path program 4 times [2020-10-14 05:25:47,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:47,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31902526] [2020-10-14 05:25:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:25:48,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:48,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-14 05:25:48,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:48,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:48,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:48,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 05:25:48,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31902526] [2020-10-14 05:25:48,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:48,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:48,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640082312] [2020-10-14 05:25:48,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:48,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:48,234 INFO L87 Difference]: Start difference. First operand 338 states and 440 transitions. Second operand 7 states. [2020-10-14 05:25:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:48,389 INFO L93 Difference]: Finished difference Result 674 states and 916 transitions. [2020-10-14 05:25:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:48,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 05:25:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:48,397 INFO L225 Difference]: With dead ends: 674 [2020-10-14 05:25:48,397 INFO L226 Difference]: Without dead ends: 560 [2020-10-14 05:25:48,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-14 05:25:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 402. [2020-10-14 05:25:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-14 05:25:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 513 transitions. [2020-10-14 05:25:48,439 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 513 transitions. Word has length 29 [2020-10-14 05:25:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:48,440 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 513 transitions. [2020-10-14 05:25:48,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 513 transitions. [2020-10-14 05:25:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:25:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:48,442 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:48,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:25:48,443 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1035418249, now seen corresponding path program 11 times [2020-10-14 05:25:48,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:48,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863553165] [2020-10-14 05:25:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:25:49,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:49,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-14 05:25:49,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:25:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:25:49,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:50,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:50,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:50,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:50,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:50,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:50,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:50,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:50,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863553165] [2020-10-14 05:25:50,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:50,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:25:50,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761278372] [2020-10-14 05:25:50,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:25:50,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:25:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:50,048 INFO L87 Difference]: Start difference. First operand 402 states and 513 transitions. Second operand 12 states. [2020-10-14 05:25:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:50,442 INFO L93 Difference]: Finished difference Result 617 states and 830 transitions. [2020-10-14 05:25:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:25:50,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-14 05:25:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:50,445 INFO L225 Difference]: With dead ends: 617 [2020-10-14 05:25:50,446 INFO L226 Difference]: Without dead ends: 538 [2020-10-14 05:25:50,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-10-14 05:25:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 427. [2020-10-14 05:25:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-14 05:25:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 549 transitions. [2020-10-14 05:25:50,474 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 549 transitions. Word has length 29 [2020-10-14 05:25:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:50,475 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 549 transitions. [2020-10-14 05:25:50,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:25:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 549 transitions. [2020-10-14 05:25:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:50,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:50,476 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:50,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:25:50,476 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash 822365280, now seen corresponding path program 5 times [2020-10-14 05:25:50,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:50,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544340573] [2020-10-14 05:25:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2073 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:52,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:52,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:52,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:52,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:52,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:52,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:52,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:52,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:52,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:52,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:52,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:25:52,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544340573] [2020-10-14 05:25:52,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:52,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:52,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249775420] [2020-10-14 05:25:52,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:52,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:52,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:52,669 INFO L87 Difference]: Start difference. First operand 427 states and 549 transitions. Second operand 10 states. [2020-10-14 05:25:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:54,395 INFO L93 Difference]: Finished difference Result 570 states and 706 transitions. [2020-10-14 05:25:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:25:54,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-14 05:25:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:54,399 INFO L225 Difference]: With dead ends: 570 [2020-10-14 05:25:54,399 INFO L226 Difference]: Without dead ends: 474 [2020-10-14 05:25:54,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:25:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-14 05:25:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 429. [2020-10-14 05:25:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-14 05:25:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 543 transitions. [2020-10-14 05:25:54,425 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 543 transitions. Word has length 30 [2020-10-14 05:25:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:54,425 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 543 transitions. [2020-10-14 05:25:54,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 543 transitions. [2020-10-14 05:25:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:54,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:54,427 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:54,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:25:54,427 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash -339482910, now seen corresponding path program 12 times [2020-10-14 05:25:54,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:54,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366011199] [2020-10-14 05:25:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1738 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:25:56,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:56,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:56,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:25:56,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366011199] [2020-10-14 05:25:56,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:56,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:56,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320096775] [2020-10-14 05:25:56,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:56,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:56,244 INFO L87 Difference]: Start difference. First operand 429 states and 543 transitions. Second operand 6 states. [2020-10-14 05:25:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:56,350 INFO L93 Difference]: Finished difference Result 460 states and 577 transitions. [2020-10-14 05:25:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:56,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-14 05:25:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:56,353 INFO L225 Difference]: With dead ends: 460 [2020-10-14 05:25:56,353 INFO L226 Difference]: Without dead ends: 393 [2020-10-14 05:25:56,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-14 05:25:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 382. [2020-10-14 05:25:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-14 05:25:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 485 transitions. [2020-10-14 05:25:56,382 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 485 transitions. Word has length 30 [2020-10-14 05:25:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:56,382 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 485 transitions. [2020-10-14 05:25:56,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 485 transitions. [2020-10-14 05:25:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:56,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:56,384 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:56,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:25:56,384 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1384461026, now seen corresponding path program 13 times [2020-10-14 05:25:56,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:56,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450502295] [2020-10-14 05:25:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:58,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:58,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-14 05:25:58,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:58,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:25:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:25:58,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:58,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:58,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:58,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:58,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:58,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:58,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:58,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:58,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:58,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:58,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450502295] [2020-10-14 05:25:58,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:58,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:58,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580268270] [2020-10-14 05:25:58,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:58,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:58,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:58,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:58,449 INFO L87 Difference]: Start difference. First operand 382 states and 485 transitions. Second operand 13 states. [2020-10-14 05:25:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:58,927 INFO L93 Difference]: Finished difference Result 602 states and 804 transitions. [2020-10-14 05:25:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:58,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 05:25:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:58,930 INFO L225 Difference]: With dead ends: 602 [2020-10-14 05:25:58,931 INFO L226 Difference]: Without dead ends: 511 [2020-10-14 05:25:58,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-10-14 05:25:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 405. [2020-10-14 05:25:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-14 05:25:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 517 transitions. [2020-10-14 05:25:58,957 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 517 transitions. Word has length 30 [2020-10-14 05:25:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:58,957 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 517 transitions. [2020-10-14 05:25:58,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 517 transitions. [2020-10-14 05:25:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:25:58,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:58,959 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:58,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:25:58,959 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -680114775, now seen corresponding path program 14 times [2020-10-14 05:25:58,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:58,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671978011] [2020-10-14 05:25:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:26:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:00,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:00,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:00,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:00,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:26:00,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671978011] [2020-10-14 05:26:00,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:00,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:26:00,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196817768] [2020-10-14 05:26:00,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:26:00,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:00,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:26:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:26:00,741 INFO L87 Difference]: Start difference. First operand 405 states and 517 transitions. Second operand 14 states. [2020-10-14 05:26:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:01,306 INFO L93 Difference]: Finished difference Result 632 states and 850 transitions. [2020-10-14 05:26:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:26:01,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-14 05:26:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:01,309 INFO L225 Difference]: With dead ends: 632 [2020-10-14 05:26:01,309 INFO L226 Difference]: Without dead ends: 541 [2020-10-14 05:26:01,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:26:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-14 05:26:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 428. [2020-10-14 05:26:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-14 05:26:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 549 transitions. [2020-10-14 05:26:01,339 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 549 transitions. Word has length 31 [2020-10-14 05:26:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:01,339 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 549 transitions. [2020-10-14 05:26:01,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:26:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 549 transitions. [2020-10-14 05:26:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:01,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:01,340 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:01,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:26:01,341 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash 897671488, now seen corresponding path program 6 times [2020-10-14 05:26:01,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:01,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550627491] [2020-10-14 05:26:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:03,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2194 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:26:03,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:03,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:03,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:03,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:03,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:03,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:03,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:03,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:03,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:03,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 05:26:03,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550627491] [2020-10-14 05:26:03,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:03,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:26:03,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646022843] [2020-10-14 05:26:03,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:26:03,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:26:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:26:03,626 INFO L87 Difference]: Start difference. First operand 428 states and 549 transitions. Second operand 8 states. [2020-10-14 05:26:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:03,812 INFO L93 Difference]: Finished difference Result 830 states and 1140 transitions. [2020-10-14 05:26:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:26:03,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-14 05:26:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:03,816 INFO L225 Difference]: With dead ends: 830 [2020-10-14 05:26:03,817 INFO L226 Difference]: Without dead ends: 694 [2020-10-14 05:26:03,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:26:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-10-14 05:26:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 483. [2020-10-14 05:26:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-10-14 05:26:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 615 transitions. [2020-10-14 05:26:03,861 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 615 transitions. Word has length 32 [2020-10-14 05:26:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:03,863 INFO L479 AbstractCegarLoop]: Abstraction has 483 states and 615 transitions. [2020-10-14 05:26:03,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:26:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 615 transitions. [2020-10-14 05:26:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:03,865 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:03,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:26:03,865 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -257455166, now seen corresponding path program 15 times [2020-10-14 05:26:03,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:03,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813361091] [2020-10-14 05:26:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2789 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:26:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:26:06,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:06,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:06,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:06,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:06,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:26:06,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813361091] [2020-10-14 05:26:06,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:06,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:26:06,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165601511] [2020-10-14 05:26:06,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:26:06,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:26:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:26:06,924 INFO L87 Difference]: Start difference. First operand 483 states and 615 transitions. Second operand 15 states. [2020-10-14 05:26:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:07,745 INFO L93 Difference]: Finished difference Result 741 states and 997 transitions. [2020-10-14 05:26:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:26:07,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 05:26:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:07,752 INFO L225 Difference]: With dead ends: 741 [2020-10-14 05:26:07,753 INFO L226 Difference]: Without dead ends: 646 [2020-10-14 05:26:07,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:26:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-14 05:26:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 508. [2020-10-14 05:26:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-14 05:26:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 650 transitions. [2020-10-14 05:26:07,807 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 650 transitions. Word has length 32 [2020-10-14 05:26:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:07,807 INFO L479 AbstractCegarLoop]: Abstraction has 508 states and 650 transitions. [2020-10-14 05:26:07,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:26:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 650 transitions. [2020-10-14 05:26:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:07,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:07,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:07,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:26:07,816 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:07,816 INFO L82 PathProgramCache]: Analyzing trace with hash 57520328, now seen corresponding path program 16 times [2020-10-14 05:26:07,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:07,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358609575] [2020-10-14 05:26:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:09,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2329 [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:26:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:26:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:26:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:10,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:10,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:10,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:10,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:10,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:10,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:26:10,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358609575] [2020-10-14 05:26:10,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:10,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:26:10,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450480615] [2020-10-14 05:26:10,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:26:10,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:26:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:26:10,286 INFO L87 Difference]: Start difference. First operand 508 states and 650 transitions. Second operand 9 states. [2020-10-14 05:26:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:10,559 INFO L93 Difference]: Finished difference Result 925 states and 1204 transitions. [2020-10-14 05:26:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:26:10,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-14 05:26:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:10,564 INFO L225 Difference]: With dead ends: 925 [2020-10-14 05:26:10,564 INFO L226 Difference]: Without dead ends: 888 [2020-10-14 05:26:10,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:26:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2020-10-14 05:26:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 602. [2020-10-14 05:26:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-14 05:26:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 766 transitions. [2020-10-14 05:26:10,609 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 766 transitions. Word has length 33 [2020-10-14 05:26:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:10,610 INFO L479 AbstractCegarLoop]: Abstraction has 602 states and 766 transitions. [2020-10-14 05:26:10,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:26:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 766 transitions. [2020-10-14 05:26:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:10,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:10,611 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:10,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:26:10,612 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:10,612 INFO L82 PathProgramCache]: Analyzing trace with hash -39909175, now seen corresponding path program 17 times [2020-10-14 05:26:10,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:10,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657377408] [2020-10-14 05:26:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:10,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:11,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:11,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2507 [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:26:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:26:13,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:13,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:13,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:13,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:13,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:13,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:26:13,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657377408] [2020-10-14 05:26:13,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:13,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:26:13,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492911518] [2020-10-14 05:26:13,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:26:13,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:13,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:26:13,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:26:13,382 INFO L87 Difference]: Start difference. First operand 602 states and 766 transitions. Second operand 16 states. [2020-10-14 05:26:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:14,122 INFO L93 Difference]: Finished difference Result 889 states and 1190 transitions. [2020-10-14 05:26:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:26:14,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-14 05:26:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:14,127 INFO L225 Difference]: With dead ends: 889 [2020-10-14 05:26:14,127 INFO L226 Difference]: Without dead ends: 777 [2020-10-14 05:26:14,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:26:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-10-14 05:26:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 629. [2020-10-14 05:26:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-10-14 05:26:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 804 transitions. [2020-10-14 05:26:14,169 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 804 transitions. Word has length 33 [2020-10-14 05:26:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:14,169 INFO L479 AbstractCegarLoop]: Abstraction has 629 states and 804 transitions. [2020-10-14 05:26:14,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:26:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 804 transitions. [2020-10-14 05:26:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:14,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:14,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:14,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:26:14,171 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash -282349566, now seen corresponding path program 18 times [2020-10-14 05:26:14,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:14,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515270074] [2020-10-14 05:26:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:14,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:26:15,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:15,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:26:15,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:15,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:15,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:15,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:15,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:26:15,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515270074] [2020-10-14 05:26:15,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:15,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:26:15,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740191508] [2020-10-14 05:26:15,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:26:15,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:26:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:15,626 INFO L87 Difference]: Start difference. First operand 629 states and 804 transitions. Second operand 13 states. [2020-10-14 05:26:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:16,357 INFO L93 Difference]: Finished difference Result 642 states and 816 transitions. [2020-10-14 05:26:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:26:16,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 05:26:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:16,361 INFO L225 Difference]: With dead ends: 642 [2020-10-14 05:26:16,361 INFO L226 Difference]: Without dead ends: 616 [2020-10-14 05:26:16,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:26:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2020-10-14 05:26:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2020-10-14 05:26:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-10-14 05:26:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 790 transitions. [2020-10-14 05:26:16,399 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 790 transitions. Word has length 34 [2020-10-14 05:26:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:16,400 INFO L479 AbstractCegarLoop]: Abstraction has 616 states and 790 transitions. [2020-10-14 05:26:16,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:26:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 790 transitions. [2020-10-14 05:26:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:16,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:16,401 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:16,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:26:16,402 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash 213094593, now seen corresponding path program 19 times [2020-10-14 05:26:16,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:16,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369497197] [2020-10-14 05:26:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:16,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:17,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:26:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:17,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:17,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:17,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:17,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:17,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 05:26:17,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369497197] [2020-10-14 05:26:17,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:17,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:17,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77189067] [2020-10-14 05:26:17,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:17,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:17,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:17,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:17,842 INFO L87 Difference]: Start difference. First operand 616 states and 790 transitions. Second operand 10 states. [2020-10-14 05:26:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:18,115 INFO L93 Difference]: Finished difference Result 660 states and 833 transitions. [2020-10-14 05:26:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:26:18,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 05:26:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:18,120 INFO L225 Difference]: With dead ends: 660 [2020-10-14 05:26:18,120 INFO L226 Difference]: Without dead ends: 639 [2020-10-14 05:26:18,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2020-10-14 05:26:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 608. [2020-10-14 05:26:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-14 05:26:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 781 transitions. [2020-10-14 05:26:18,156 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 781 transitions. Word has length 34 [2020-10-14 05:26:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:18,156 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 781 transitions. [2020-10-14 05:26:18,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 781 transitions. [2020-10-14 05:26:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:18,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:18,158 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:18,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:26:18,158 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:18,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -877161279, now seen corresponding path program 7 times [2020-10-14 05:26:18,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:18,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676428334] [2020-10-14 05:26:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:18,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:22,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:22,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4046 [2020-10-14 05:26:22,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:22,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:26:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:26:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:22,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:22,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:22,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:22,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:26:22,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676428334] [2020-10-14 05:26:22,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:22,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:22,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044967212] [2020-10-14 05:26:22,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:22,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:22,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:22,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:22,372 INFO L87 Difference]: Start difference. First operand 608 states and 781 transitions. Second operand 12 states. [2020-10-14 05:26:22,704 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-10-14 05:26:22,990 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-10-14 05:26:24,726 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-14 05:26:25,310 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 05:26:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:25,770 INFO L93 Difference]: Finished difference Result 874 states and 1059 transitions. [2020-10-14 05:26:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:26:25,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 05:26:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:25,775 INFO L225 Difference]: With dead ends: 874 [2020-10-14 05:26:25,775 INFO L226 Difference]: Without dead ends: 723 [2020-10-14 05:26:25,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:26:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-10-14 05:26:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 592. [2020-10-14 05:26:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-10-14 05:26:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 747 transitions. [2020-10-14 05:26:25,811 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 747 transitions. Word has length 34 [2020-10-14 05:26:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:25,812 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 747 transitions. [2020-10-14 05:26:25,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 747 transitions. [2020-10-14 05:26:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:25,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:25,813 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:25,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:26:25,814 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1885918046, now seen corresponding path program 20 times [2020-10-14 05:26:25,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:25,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251273076] [2020-10-14 05:26:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:25,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:27,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:28,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:28,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:28,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2354 [2020-10-14 05:26:28,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:28,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:28,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:26:28,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:28,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:26:28,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:28,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:28,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:28,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:28,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:28,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:28,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:28,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:28,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:26:28,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251273076] [2020-10-14 05:26:28,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:28,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:26:28,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948918867] [2020-10-14 05:26:28,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:26:28,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:28,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:26:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:26:28,429 INFO L87 Difference]: Start difference. First operand 592 states and 747 transitions. Second operand 17 states. [2020-10-14 05:26:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:29,200 INFO L93 Difference]: Finished difference Result 910 states and 1213 transitions. [2020-10-14 05:26:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:26:29,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-14 05:26:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:29,204 INFO L225 Difference]: With dead ends: 910 [2020-10-14 05:26:29,204 INFO L226 Difference]: Without dead ends: 778 [2020-10-14 05:26:29,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:26:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-10-14 05:26:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 618. [2020-10-14 05:26:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-10-14 05:26:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 783 transitions. [2020-10-14 05:26:29,244 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 783 transitions. Word has length 34 [2020-10-14 05:26:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:29,244 INFO L479 AbstractCegarLoop]: Abstraction has 618 states and 783 transitions. [2020-10-14 05:26:29,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:26:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 783 transitions. [2020-10-14 05:26:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:26:29,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:29,246 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:29,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:26:29,246 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1689222998, now seen corresponding path program 21 times [2020-10-14 05:26:29,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:29,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86214843] [2020-10-14 05:26:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:32,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:26:32,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:32,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3382 [2020-10-14 05:26:32,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:32,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:32,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:26:32,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:26:32,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:26:32,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:26:32,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86214843] [2020-10-14 05:26:32,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:32,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:32,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307899305] [2020-10-14 05:26:32,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:32,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:32,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:32,761 INFO L87 Difference]: Start difference. First operand 618 states and 783 transitions. Second operand 10 states. [2020-10-14 05:26:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:33,030 INFO L93 Difference]: Finished difference Result 1175 states and 1524 transitions. [2020-10-14 05:26:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:26:33,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-14 05:26:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:33,035 INFO L225 Difference]: With dead ends: 1175 [2020-10-14 05:26:33,035 INFO L226 Difference]: Without dead ends: 1128 [2020-10-14 05:26:33,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-14 05:26:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 727. [2020-10-14 05:26:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-10-14 05:26:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 917 transitions. [2020-10-14 05:26:33,072 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 917 transitions. Word has length 35 [2020-10-14 05:26:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:33,072 INFO L479 AbstractCegarLoop]: Abstraction has 727 states and 917 transitions. [2020-10-14 05:26:33,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 917 transitions. [2020-10-14 05:26:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:26:33,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:33,074 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:33,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:26:33,074 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:33,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1017349097, now seen corresponding path program 22 times [2020-10-14 05:26:33,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:33,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477171883] [2020-10-14 05:26:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:33,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:33,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:33,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:34,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:34,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:36,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:36,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:26:36,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3007 [2020-10-14 05:26:36,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:36,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:26:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:26:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:36,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:36,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:36,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:36,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:36,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:36,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:26:36,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477171883] [2020-10-14 05:26:36,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:36,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:26:36,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905011684] [2020-10-14 05:26:36,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:26:36,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:26:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:26:36,364 INFO L87 Difference]: Start difference. First operand 727 states and 917 transitions. Second operand 18 states. [2020-10-14 05:26:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:37,251 INFO L93 Difference]: Finished difference Result 1080 states and 1432 transitions. [2020-10-14 05:26:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:26:37,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-14 05:26:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:37,257 INFO L225 Difference]: With dead ends: 1080 [2020-10-14 05:26:37,257 INFO L226 Difference]: Without dead ends: 925 [2020-10-14 05:26:37,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:26:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-10-14 05:26:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 755. [2020-10-14 05:26:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-10-14 05:26:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 956 transitions. [2020-10-14 05:26:37,299 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 956 transitions. Word has length 35 [2020-10-14 05:26:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:37,299 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 956 transitions. [2020-10-14 05:26:37,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:26:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 956 transitions. [2020-10-14 05:26:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:37,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:37,301 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:37,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:26:37,301 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:37,302 INFO L82 PathProgramCache]: Analyzing trace with hash 824317314, now seen corresponding path program 23 times [2020-10-14 05:26:37,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:37,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895390366] [2020-10-14 05:26:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:37,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:37,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:37,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:39,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:39,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:39,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2548 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:26:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:45,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:45,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:26:45,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895390366] [2020-10-14 05:26:45,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:45,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:26:45,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852812851] [2020-10-14 05:26:45,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:26:45,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:45,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:26:45,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=503, Unknown=1, NotChecked=0, Total=552 [2020-10-14 05:26:45,559 INFO L87 Difference]: Start difference. First operand 755 states and 956 transitions. Second operand 24 states. [2020-10-14 05:26:48,140 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2020-10-14 05:26:48,753 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2020-10-14 05:26:52,665 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2020-10-14 05:26:55,563 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 99 DAG size of output: 33 [2020-10-14 05:26:57,465 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 33 [2020-10-14 05:27:01,315 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 125 DAG size of output: 33 [2020-10-14 05:27:11,250 WARN L193 SmtUtils]: Spent 9.51 s on a formula simplification. DAG size of input: 138 DAG size of output: 33 [2020-10-14 05:27:17,490 WARN L193 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 151 DAG size of output: 33 [2020-10-14 05:27:31,912 WARN L193 SmtUtils]: Spent 12.64 s on a formula simplification. DAG size of input: 164 DAG size of output: 42 [2020-10-14 05:27:43,561 WARN L193 SmtUtils]: Spent 11.07 s on a formula simplification. DAG size of input: 177 DAG size of output: 33 [2020-10-14 05:28:17,790 WARN L193 SmtUtils]: Spent 26.32 s on a formula simplification. DAG size of input: 196 DAG size of output: 32