/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:42:17,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:42:17,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:42:17,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:42:17,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:42:17,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:42:17,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:42:17,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:42:17,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:42:17,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:42:17,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:42:17,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:42:17,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:42:17,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:42:17,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:42:17,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:42:17,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:42:17,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:42:17,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:42:17,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:42:17,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:42:17,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:42:17,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:42:17,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:42:17,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:42:17,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:42:17,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:42:17,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:42:17,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:42:17,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:42:17,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:42:17,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:42:17,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:42:17,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:42:17,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:42:17,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:42:17,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:42:17,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:42:17,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:42:17,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:42:17,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:42:17,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:42:17,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:42:17,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:42:17,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:42:17,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:42:17,686 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:42:17,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:42:17,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:42:17,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:42:17,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:42:17,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:42:17,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:42:17,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:42:17,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:42:17,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:42:17,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:42:17,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:42:17,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:42:17,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:42:17,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:42:17,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:42:17,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:42:17,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:42:17,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:42:17,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:42:17,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:42:17,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:42:17,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:42:17,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:42:17,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:42:17,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:42:17,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:42:17,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:42:18,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:42:18,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:42:18,005 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:42:18,005 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2020-10-13 04:42:18,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ef1cac7/77eeb2db1e6a47f99e445efc9ab49865/FLAG68a1753f8 [2020-10-13 04:42:18,520 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:42:18,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2020-10-13 04:42:18,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ef1cac7/77eeb2db1e6a47f99e445efc9ab49865/FLAG68a1753f8 [2020-10-13 04:42:18,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ef1cac7/77eeb2db1e6a47f99e445efc9ab49865 [2020-10-13 04:42:18,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:42:18,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:42:18,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:42:18,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:42:18,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:42:18,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:42:18" (1/1) ... [2020-10-13 04:42:18,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecc4458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:18, skipping insertion in model container [2020-10-13 04:42:18,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:42:18" (1/1) ... [2020-10-13 04:42:18,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:42:18,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:42:19,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:42:19,182 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:42:19,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:42:19,224 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:42:19,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19 WrapperNode [2020-10-13 04:42:19,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:42:19,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:42:19,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:42:19,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:42:19,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... [2020-10-13 04:42:19,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:42:19,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:42:19,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:42:19,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:42:19,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:42:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:42:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:42:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:42:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:42:19,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:42:19,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:42:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:42:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:42:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:42:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:42:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:42:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:42:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:42:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:42:19,661 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:42:19,661 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:42:19,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:19 BoogieIcfgContainer [2020-10-13 04:42:19,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:42:19,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:42:19,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:42:19,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:42:19,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:42:18" (1/3) ... [2020-10-13 04:42:19,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cf6a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:19, skipping insertion in model container [2020-10-13 04:42:19,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:19" (2/3) ... [2020-10-13 04:42:19,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cf6a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:19, skipping insertion in model container [2020-10-13 04:42:19,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:19" (3/3) ... [2020-10-13 04:42:19,675 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2020-10-13 04:42:19,687 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:42:19,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:42:19,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:42:19,736 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:42:19,736 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:42:19,736 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:42:19,737 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:42:19,737 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:42:19,737 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:42:19,737 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:42:19,737 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:42:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 04:42:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:42:19,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:19,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:19,762 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:19,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-13 04:42:19,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:19,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528115427] [2020-10-13 04:42:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:20,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:42:20,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:20,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 04:42:20,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:42:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:20,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:42:20,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:20,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:20,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:20,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:20,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 04:42:20,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:20,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:20,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528115427] [2020-10-13 04:42:20,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:20,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:42:20,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72901445] [2020-10-13 04:42:20,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:42:20,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:42:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:20,207 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 04:42:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:20,321 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-13 04:42:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:42:20,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 04:42:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:20,334 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:42:20,335 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 04:42:20,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 04:42:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 04:42:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:42:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 04:42:20,375 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-13 04:42:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:20,375 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 04:42:20,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:42:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 04:42:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:42:20,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:20,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:20,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:42:20,378 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2020-10-13 04:42:20,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:20,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325883027] [2020-10-13 04:42:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:20,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:20,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:42:20,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:20,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-13 04:42:20,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:20,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:20,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:20,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:20,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:20,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:20,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:20,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:20,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:20,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:20,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:20,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325883027] [2020-10-13 04:42:20,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:20,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:20,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348898464] [2020-10-13 04:42:20,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:20,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:20,586 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-13 04:42:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:20,674 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 04:42:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:20,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 04:42:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:20,676 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:42:20,676 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:42:20,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:42:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 04:42:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:42:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 04:42:20,693 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-13 04:42:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:20,693 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 04:42:20,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 04:42:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:42:20,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:20,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:20,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:42:20,697 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:20,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1578997828, now seen corresponding path program 1 times [2020-10-13 04:42:20,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:20,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53577973] [2020-10-13 04:42:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:20,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:42:20,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:20,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 04:42:20,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:20,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:20,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:20,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:20,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:20,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:20,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53577973] [2020-10-13 04:42:20,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:20,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:20,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841243056] [2020-10-13 04:42:20,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:20,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:20,974 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-10-13 04:42:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:21,039 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-13 04:42:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:21,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:42:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:21,041 INFO L225 Difference]: With dead ends: 36 [2020-10-13 04:42:21,041 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:42:21,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:42:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 04:42:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:42:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 04:42:21,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-13 04:42:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:21,049 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 04:42:21,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 04:42:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:42:21,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:21,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:21,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:42:21,051 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2020-10-13 04:42:21,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:21,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633790419] [2020-10-13 04:42:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:42:21,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-13 04:42:21,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:42:21,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:21,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:21,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:21,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:21,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:21,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:21,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633790419] [2020-10-13 04:42:21,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:21,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:21,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221953374] [2020-10-13 04:42:21,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:21,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:21,437 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-13 04:42:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:21,505 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-13 04:42:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:21,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 04:42:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:21,507 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:42:21,507 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:42:21,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:42:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 04:42:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:42:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 04:42:21,513 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-10-13 04:42:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:21,514 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 04:42:21,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 04:42:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:42:21,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:21,515 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:21,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:42:21,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 515736960, now seen corresponding path program 2 times [2020-10-13 04:42:21,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:21,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524427299] [2020-10-13 04:42:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:42:21,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 04:42:21,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:42:21,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:21,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:21,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:21,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:42:21,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524427299] [2020-10-13 04:42:21,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:21,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:21,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330443644] [2020-10-13 04:42:21,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:21,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:21,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:21,784 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-13 04:42:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:21,866 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-13 04:42:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:21,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 04:42:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:21,868 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:42:21,868 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:42:21,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:42:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 04:42:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:42:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 04:42:21,874 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-13 04:42:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:21,875 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 04:42:21,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 04:42:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:42:21,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:21,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:21,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:42:21,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 3 times [2020-10-13 04:42:21,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:21,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439824603] [2020-10-13 04:42:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:22,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:42:22,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:22,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-13 04:42:22,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:22,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:22,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:22,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:22,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:22,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:22,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:22,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:22,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:22,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:42:22,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439824603] [2020-10-13 04:42:22,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:22,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:22,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512634049] [2020-10-13 04:42:22,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:22,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:22,254 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-13 04:42:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:22,326 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-13 04:42:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:22,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 04:42:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:22,328 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:42:22,328 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:42:22,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:42:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 04:42:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:42:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 04:42:22,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-13 04:42:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:22,335 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 04:42:22,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 04:42:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:42:22,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:22,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:22,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:42:22,337 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash 683083068, now seen corresponding path program 4 times [2020-10-13 04:42:22,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:22,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965556513] [2020-10-13 04:42:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:22,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:22,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:42:22,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:22,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-13 04:42:22,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:42:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:22,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:22,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:22,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:22,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:22,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:22,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:22,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:22,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:42:22,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965556513] [2020-10-13 04:42:22,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:22,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:22,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352171682] [2020-10-13 04:42:22,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:22,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:22,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:22,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:22,878 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-13 04:42:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:22,951 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-13 04:42:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:22,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 04:42:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:22,952 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:42:22,952 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:42:22,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:42:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:42:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:42:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 04:42:22,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-10-13 04:42:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:22,959 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 04:42:22,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:22,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 04:42:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:42:22,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:22,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:22,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:42:22,961 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 5 times [2020-10-13 04:42:22,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:22,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165083658] [2020-10-13 04:42:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:22,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:23,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:23,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:42:23,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-13 04:42:23,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:42:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:23,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:23,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:23,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:23,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:23,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:23,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:23,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:23,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:23,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:23,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:23,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:23,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:42:23,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165083658] [2020-10-13 04:42:23,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:23,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:23,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612239717] [2020-10-13 04:42:23,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:23,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:23,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:23,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:23,634 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-13 04:42:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:23,717 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-13 04:42:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:23,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 04:42:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:23,719 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:42:23,719 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:42:23,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:42:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 04:42:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:42:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 04:42:23,731 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-13 04:42:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:23,731 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 04:42:23,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 04:42:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:42:23,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:23,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:23,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:42:23,734 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash -194529672, now seen corresponding path program 6 times [2020-10-13 04:42:23,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:23,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359997541] [2020-10-13 04:42:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:23,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:23,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:42:24,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:24,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-10-13 04:42:24,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:24,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:24,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:24,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:24,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:24,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:24,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:24,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:24,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:42:24,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359997541] [2020-10-13 04:42:24,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:25,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:25,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577992705] [2020-10-13 04:42:25,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:25,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:25,003 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-10-13 04:42:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:25,120 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-13 04:42:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:25,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 04:42:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:25,122 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:42:25,123 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:42:25,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:42:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 04:42:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:42:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 04:42:25,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-10-13 04:42:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:25,129 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 04:42:25,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 04:42:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:42:25,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:25,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:25,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:42:25,131 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 7 times [2020-10-13 04:42:25,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:25,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113555835] [2020-10-13 04:42:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:25,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:25,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:26,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:26,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:42:26,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:26,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1476 [2020-10-13 04:42:26,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:26,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:26,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:26,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:42:26,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:26,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:26,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:26,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:26,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:26,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:26,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:26,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:26,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:26,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:42:26,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113555835] [2020-10-13 04:42:26,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:26,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:26,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588903839] [2020-10-13 04:42:26,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:26,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:26,694 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-10-13 04:42:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:26,775 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-10-13 04:42:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:26,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 04:42:26,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:26,776 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:42:26,776 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:42:26,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:42:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 04:42:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:42:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 04:42:26,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-13 04:42:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:26,782 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 04:42:26,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 04:42:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:42:26,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:26,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:26,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:42:26,784 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash -894191052, now seen corresponding path program 8 times [2020-10-13 04:42:26,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:26,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42107183] [2020-10-13 04:42:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:28,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:42:28,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:28,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-10-13 04:42:28,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:42:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:42:28,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:28,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:28,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:28,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:28,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:28,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:28,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:42:28,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42107183] [2020-10-13 04:42:28,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:28,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:28,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980195714] [2020-10-13 04:42:28,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:28,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:28,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:28,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:28,367 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-13 04:42:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:28,446 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-13 04:42:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:28,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-13 04:42:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:28,448 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:42:28,448 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:42:28,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:42:28,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:42:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:42:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 04:42:28,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-13 04:42:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:28,454 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 04:42:28,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 04:42:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:42:28,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:28,455 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:28,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:42:28,456 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:28,456 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 9 times [2020-10-13 04:42:28,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:28,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760028385] [2020-10-13 04:42:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:30,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:42:30,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:30,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-13 04:42:30,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:42:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:30,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:30,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:30,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:30,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:30,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:30,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:30,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:30,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:30,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:30,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:42:30,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760028385] [2020-10-13 04:42:30,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:30,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:30,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478207382] [2020-10-13 04:42:30,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:30,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:30,296 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-13 04:42:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:30,389 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-13 04:42:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:30,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 04:42:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:30,391 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:42:30,391 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:42:30,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:42:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 04:42:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:42:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-13 04:42:30,399 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2020-10-13 04:42:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:30,399 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-13 04:42:30,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-13 04:42:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:42:30,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:30,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:30,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:42:30,401 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 781266800, now seen corresponding path program 10 times [2020-10-13 04:42:30,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:30,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752897269] [2020-10-13 04:42:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:32,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:32,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:42:32,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:32,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1884 [2020-10-13 04:42:32,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:32,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:32,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:32,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:32,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:32,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:32,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:32,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:32,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:32,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:32,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:42:32,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752897269] [2020-10-13 04:42:32,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:32,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:32,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406591498] [2020-10-13 04:42:32,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:32,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:32,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:32,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:32,407 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2020-10-13 04:42:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:32,504 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-13 04:42:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:32,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 04:42:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:32,506 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:42:32,506 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:42:32,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:42:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:42:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:42:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 04:42:32,514 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-13 04:42:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:32,515 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 04:42:32,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 04:42:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:42:32,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:32,520 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:32,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:42:32,521 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1966517006, now seen corresponding path program 11 times [2020-10-13 04:42:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:32,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142451325] [2020-10-13 04:42:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:32,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:34,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:42:34,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:34,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2179 [2020-10-13 04:42:34,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:34,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:34,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:42:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:34,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:34,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:34,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:34,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:42:34,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142451325] [2020-10-13 04:42:34,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:34,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:34,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094862871] [2020-10-13 04:42:34,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:34,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:34,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:34,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:34,842 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-13 04:42:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:34,944 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-13 04:42:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:34,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 04:42:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:34,945 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:42:34,945 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:42:34,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:42:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 04:42:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:42:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-13 04:42:34,953 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-13 04:42:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:34,953 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-13 04:42:34,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-13 04:42:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:42:34,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:34,957 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:34,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:42:34,957 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash 67184364, now seen corresponding path program 12 times [2020-10-13 04:42:34,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:34,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11713217] [2020-10-13 04:42:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:37,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:42:37,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:37,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2447 [2020-10-13 04:42:37,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:37,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:37,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:37,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:37,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:37,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:37,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:37,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:37,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:37,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:37,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:42:37,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11713217] [2020-10-13 04:42:37,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:37,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:37,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917515943] [2020-10-13 04:42:37,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:37,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:37,505 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 10 states. [2020-10-13 04:42:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:37,593 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-13 04:42:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:37,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-13 04:42:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:37,595 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:42:37,595 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:42:37,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:42:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:42:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:42:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 04:42:37,606 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-10-13 04:42:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:37,607 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 04:42:37,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 04:42:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:42:37,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:37,608 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:37,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:42:37,608 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 13 times [2020-10-13 04:42:37,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:37,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022351886] [2020-10-13 04:42:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:40,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:40,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:42:40,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2957 [2020-10-13 04:42:40,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:42:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:42:40,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:40,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:40,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:40,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:40,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:40,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:40,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:40,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:42:40,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022351886] [2020-10-13 04:42:40,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:40,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:40,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692791742] [2020-10-13 04:42:40,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:40,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:40,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:40,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:40,691 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2020-10-13 04:42:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:40,782 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-13 04:42:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:40,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 04:42:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:40,783 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:42:40,784 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 04:42:40,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 04:42:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 04:42:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:42:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-13 04:42:40,789 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2020-10-13 04:42:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:40,789 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-13 04:42:40,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-13 04:42:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:42:40,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:40,790 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:40,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:42:40,791 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1167192168, now seen corresponding path program 14 times [2020-10-13 04:42:40,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:40,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512049559] [2020-10-13 04:42:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:40,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3911 [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:44,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:42:44,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:44,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:44,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:44,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:44,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:44,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:44,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:42:44,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512049559] [2020-10-13 04:42:44,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:44,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:44,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854529944] [2020-10-13 04:42:44,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:44,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:44,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:44,810 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 11 states. [2020-10-13 04:42:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:44,895 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-13 04:42:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:44,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 04:42:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:44,896 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:42:44,897 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:42:44,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:42:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 04:42:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:42:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 04:42:44,901 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-13 04:42:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:44,901 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 04:42:44,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 04:42:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:42:44,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:44,902 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:44,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:42:44,903 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2059988486, now seen corresponding path program 15 times [2020-10-13 04:42:44,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:44,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5842727] [2020-10-13 04:42:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:44,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:48,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:48,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:42:48,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3474 [2020-10-13 04:42:48,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:48,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:48,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:42:48,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:48,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:48,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:48,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:48,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:48,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:42:48,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5842727] [2020-10-13 04:42:48,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:48,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:48,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302206993] [2020-10-13 04:42:48,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:48,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:48,515 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 12 states. [2020-10-13 04:42:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:48,591 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-13 04:42:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:48,592 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-13 04:42:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:48,592 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:42:48,593 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:42:48,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:42:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 04:42:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:42:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-13 04:42:48,597 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-13 04:42:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:48,597 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-13 04:42:48,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-13 04:42:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:42:48,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:48,598 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:48,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:42:48,599 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash -301036572, now seen corresponding path program 16 times [2020-10-13 04:42:48,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:48,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168444044] [2020-10-13 04:42:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3809 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:52,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:52,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:52,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:52,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:52,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:52,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:42:52,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168444044] [2020-10-13 04:42:52,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:52,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:52,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221572352] [2020-10-13 04:42:52,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:52,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:52,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:52,519 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 12 states. [2020-10-13 04:42:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:52,632 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-13 04:42:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:52,632 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 04:42:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:52,633 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:42:52,633 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:42:52,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:42:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:42:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:42:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 04:42:52,640 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-10-13 04:42:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:52,640 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 04:42:52,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 04:42:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:42:52,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:52,641 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:52,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:42:52,641 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1909355902, now seen corresponding path program 17 times [2020-10-13 04:42:52,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:52,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537749676] [2020-10-13 04:42:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:52,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4023 [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:42:56,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:42:56,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:42:56,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:56,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:56,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:56,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:42:56,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537749676] [2020-10-13 04:42:56,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:56,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:42:56,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846062774] [2020-10-13 04:42:56,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:42:56,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:42:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:56,809 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2020-10-13 04:42:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:56,896 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-13 04:42:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:42:56,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 04:42:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:56,898 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:42:56,898 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:56,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:42:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:42:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 04:42:56,903 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2020-10-13 04:42:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:56,904 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 04:42:56,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:42:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 04:42:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:42:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:56,905 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:56,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:42:56,905 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -910034592, now seen corresponding path program 18 times [2020-10-13 04:42:56,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:56,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406108692] [2020-10-13 04:42:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:56,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:56,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:01,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:01,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:43:01,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:01,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4695 [2020-10-13 04:43:01,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:43:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:43:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:01,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:01,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:01,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:01,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:01,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:01,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:43:01,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:01,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:43:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:43:01,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406108692] [2020-10-13 04:43:01,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:01,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:43:01,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536184216] [2020-10-13 04:43:01,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:43:01,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:43:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:43:01,766 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 13 states. [2020-10-13 04:43:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:01,919 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-10-13 04:43:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:43:01,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-13 04:43:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:01,921 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:43:01,921 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:43:01,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:43:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:43:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 04:43:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:43:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 04:43:01,930 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-13 04:43:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:01,931 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 04:43:01,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:43:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 04:43:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:43:01,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:01,932 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:01,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:43:01,933 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1930921730, now seen corresponding path program 19 times [2020-10-13 04:43:01,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:01,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129739950] [2020-10-13 04:43:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:02,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:06,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:06,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:43:06,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:06,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:43:06,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:06,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:43:06,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:06,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:43:06,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:07,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:07,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:07,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:07,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:07,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:07,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:07,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:43:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:43:07,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129739950] [2020-10-13 04:43:07,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:07,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:43:07,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311440623] [2020-10-13 04:43:07,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:43:07,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:43:07,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:07,116 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 14 states. [2020-10-13 04:43:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:07,219 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-13 04:43:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:43:07,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-13 04:43:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:07,220 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:43:07,221 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 04:43:07,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 04:43:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 04:43:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:43:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 04:43:07,225 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-10-13 04:43:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:07,225 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 04:43:07,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:43:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 04:43:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:43:07,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:07,226 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:07,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:43:07,227 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash 544049436, now seen corresponding path program 20 times [2020-10-13 04:43:07,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:07,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149205374] [2020-10-13 04:43:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:07,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:12,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:12,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:43:12,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:12,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:12,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:12,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:12,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:12,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:12,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:12,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:43:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:43:12,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149205374] [2020-10-13 04:43:12,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:12,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:43:12,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688264008] [2020-10-13 04:43:12,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:43:12,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:12,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:43:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:12,406 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 14 states. [2020-10-13 04:43:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:12,576 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-13 04:43:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:43:12,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-13 04:43:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:12,577 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:43:12,578 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:43:12,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:43:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 04:43:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:43:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 04:43:12,586 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-13 04:43:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:12,586 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 04:43:12,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:43:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 04:43:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:43:12,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:12,587 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:12,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:43:12,588 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1124550278, now seen corresponding path program 21 times [2020-10-13 04:43:12,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:12,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297371638] [2020-10-13 04:43:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:12,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:12,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:17,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:17,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:43:17,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:17,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:43:17,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:17,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:43:17,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:43:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:17,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:17,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:17,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:17,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:17,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:43:17,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297371638] [2020-10-13 04:43:17,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:17,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:43:17,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229440912] [2020-10-13 04:43:17,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:43:17,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:17,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:43:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:17,748 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 15 states. [2020-10-13 04:43:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:17,847 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-13 04:43:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:43:17,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 04:43:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:17,849 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:43:17,849 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:43:17,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:43:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:43:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:43:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 04:43:17,852 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-13 04:43:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:17,853 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 04:43:17,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:43:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 04:43:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:43:17,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:17,854 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:17,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:43:17,857 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -384005480, now seen corresponding path program 22 times [2020-10-13 04:43:17,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:17,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220873836] [2020-10-13 04:43:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:17,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:17,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:22,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:22,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:43:22,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:22,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:43:22,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:43:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:43:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:43:22,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:23,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:23,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:23,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:23,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:23,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:23,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:23,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:43:23,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220873836] [2020-10-13 04:43:23,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:23,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:43:23,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515012622] [2020-10-13 04:43:23,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:43:23,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:43:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:23,018 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2020-10-13 04:43:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:23,151 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-13 04:43:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:43:23,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-13 04:43:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:23,153 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:43:23,153 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:43:23,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:43:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:43:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:43:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 04:43:23,157 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-13 04:43:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:23,157 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 04:43:23,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:43:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 04:43:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:43:23,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:23,158 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:23,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:43:23,159 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 367873014, now seen corresponding path program 23 times [2020-10-13 04:43:23,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:23,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618392009] [2020-10-13 04:43:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:28,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:43:28,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:28,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:28,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:28,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:28,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:28,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:28,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:28,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:43:28,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618392009] [2020-10-13 04:43:28,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:28,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:28,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076768795] [2020-10-13 04:43:28,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:28,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:28,339 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2020-10-13 04:43:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:28,479 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-10-13 04:43:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:28,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-13 04:43:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:28,480 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:43:28,480 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:43:28,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:43:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 04:43:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:43:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 04:43:28,485 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-13 04:43:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:28,486 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 04:43:28,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 04:43:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:43:28,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:28,487 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:28,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:43:28,487 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash -77111788, now seen corresponding path program 24 times [2020-10-13 04:43:28,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:28,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703902186] [2020-10-13 04:43:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:28,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:28,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:43:33,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:43:33,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:33,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:33,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:33,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:33,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:33,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:33,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:33,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:33,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:33,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:33,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 04:43:33,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703902186] [2020-10-13 04:43:33,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:33,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:33,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953624738] [2020-10-13 04:43:33,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:33,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:33,690 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 16 states. [2020-10-13 04:43:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:33,840 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-13 04:43:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:33,841 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-13 04:43:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:33,842 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:43:33,842 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:43:33,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:43:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 04:43:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:43:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 04:43:33,847 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-13 04:43:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:33,847 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 04:43:33,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 04:43:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:43:33,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:33,848 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:33,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:43:33,849 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1060032398, now seen corresponding path program 25 times [2020-10-13 04:43:33,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:33,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828455456] [2020-10-13 04:43:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:38,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:43:38,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:39,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:39,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:39,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:39,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:39,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:39,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:39,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:39,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:39,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 04:43:39,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828455456] [2020-10-13 04:43:39,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:39,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:43:39,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125412826] [2020-10-13 04:43:39,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:43:39,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:43:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:39,043 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 17 states. [2020-10-13 04:43:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:39,197 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-13 04:43:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:43:39,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-13 04:43:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:39,199 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:43:39,199 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:43:39,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:43:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 04:43:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:43:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 04:43:39,204 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-13 04:43:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:39,204 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 04:43:39,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:43:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 04:43:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 04:43:39,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:39,205 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:39,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:43:39,206 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash -753933488, now seen corresponding path program 26 times [2020-10-13 04:43:39,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:39,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577700689] [2020-10-13 04:43:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:39,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:39,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:44,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:44,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:43:44,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:43:44,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:43:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:43:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:44,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:44,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:44,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:44,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:44,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:44,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:44,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:44,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:44,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:44,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:44,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:43:44,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577700689] [2020-10-13 04:43:44,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:44,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:43:44,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841346124] [2020-10-13 04:43:44,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:43:44,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:43:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:44,412 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 17 states. [2020-10-13 04:43:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:44,550 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-13 04:43:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:43:44,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-13 04:43:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:44,551 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:43:44,551 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:43:44,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:43:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:43:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:43:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 04:43:44,558 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-13 04:43:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:44,559 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 04:43:44,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:43:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 04:43:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:43:44,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:44,562 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:44,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:43:44,562 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1741723922, now seen corresponding path program 27 times [2020-10-13 04:43:44,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:44,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451582842] [2020-10-13 04:43:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:44,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:44,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:49,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:43:49,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:49,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:49,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:49,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:49,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:49,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:49,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:49,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:43:49,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451582842] [2020-10-13 04:43:49,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:49,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:43:49,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267796797] [2020-10-13 04:43:49,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:43:49,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:43:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:49,777 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 18 states. [2020-10-13 04:43:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:49,874 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-13 04:43:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:43:49,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-10-13 04:43:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:49,875 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:43:49,876 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:43:49,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:43:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 04:43:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:43:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 04:43:49,880 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-13 04:43:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:49,881 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 04:43:49,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:43:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 04:43:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:43:49,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:49,882 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:49,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:43:49,882 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1270508236, now seen corresponding path program 28 times [2020-10-13 04:43:49,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:49,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999104514] [2020-10-13 04:43:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:49,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:54,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:54,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:43:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:55,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:55,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:55,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:43:55,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999104514] [2020-10-13 04:43:55,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:55,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:43:55,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948285998] [2020-10-13 04:43:55,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:43:55,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:43:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:55,116 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 18 states. [2020-10-13 04:43:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:55,280 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2020-10-13 04:43:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:43:55,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-13 04:43:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:55,282 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:43:55,282 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:43:55,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:43:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:43:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:43:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 04:43:55,292 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-13 04:43:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:55,293 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 04:43:55,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:43:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 04:43:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:43:55,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:55,294 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:55,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:43:55,294 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1475154070, now seen corresponding path program 29 times [2020-10-13 04:43:55,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:55,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913448953] [2020-10-13 04:43:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:55,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:00,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:00,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:44:00,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:00,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 04:44:00,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:00,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:44:00,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:00,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:44:00,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:00,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:00,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:00,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:00,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:00,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:00,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:00,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:44:00,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913448953] [2020-10-13 04:44:00,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:00,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:44:00,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299852239] [2020-10-13 04:44:00,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:44:00,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:44:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:00,588 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 19 states. [2020-10-13 04:44:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:00,749 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2020-10-13 04:44:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:44:00,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2020-10-13 04:44:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:00,751 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:44:00,751 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:44:00,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:44:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 04:44:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:44:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 04:44:00,757 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-13 04:44:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:00,758 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 04:44:00,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:44:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 04:44:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:44:00,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:00,759 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:00,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:44:00,759 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1348256904, now seen corresponding path program 30 times [2020-10-13 04:44:00,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:00,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578835376] [2020-10-13 04:44:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:00,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:05,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:44:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:44:05,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:06,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:06,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:06,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:06,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:06,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:06,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:06,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:44:06,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578835376] [2020-10-13 04:44:06,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:06,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:44:06,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454153656] [2020-10-13 04:44:06,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:44:06,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:44:06,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:06,011 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-10-13 04:44:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:06,175 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-13 04:44:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:44:06,175 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-10-13 04:44:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:06,176 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:44:06,176 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:44:06,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:44:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 04:44:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:44:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 04:44:06,182 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-13 04:44:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:06,183 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 04:44:06,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:44:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 04:44:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 04:44:06,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:06,184 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:06,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:44:06,184 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:06,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1375286810, now seen corresponding path program 31 times [2020-10-13 04:44:06,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:06,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746099131] [2020-10-13 04:44:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:06,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:06,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:11,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:11,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 04:44:11,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:11,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:44:11,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:44:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:44:11,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:11,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:11,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:11,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:11,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:11,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:44:11,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746099131] [2020-10-13 04:44:11,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:11,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:44:11,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091337456] [2020-10-13 04:44:11,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:44:11,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:44:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:11,474 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 20 states. [2020-10-13 04:44:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:11,646 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-13 04:44:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:44:11,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-10-13 04:44:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:11,647 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:44:11,648 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 04:44:11,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 04:44:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 04:44:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:44:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 04:44:11,653 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-13 04:44:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:11,653 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 04:44:11,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:44:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 04:44:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:44:11,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:11,654 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:11,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:44:11,655 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash -989536252, now seen corresponding path program 32 times [2020-10-13 04:44:11,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:11,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487920085] [2020-10-13 04:44:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:11,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:16,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:44:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:44:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:16,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:16,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:16,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:16,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:16,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:16,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:16,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 04:44:16,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487920085] [2020-10-13 04:44:16,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:16,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:44:16,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129771076] [2020-10-13 04:44:16,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:44:16,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:44:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:16,920 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 20 states. [2020-10-13 04:44:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:17,096 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-13 04:44:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:44:17,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-13 04:44:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:17,097 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:44:17,097 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:44:17,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:44:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:44:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:44:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-13 04:44:17,102 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-13 04:44:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:17,103 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-13 04:44:17,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:44:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-13 04:44:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:44:17,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:17,104 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:17,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:44:17,104 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613918, now seen corresponding path program 33 times [2020-10-13 04:44:17,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:17,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770525384] [2020-10-13 04:44:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:22,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:22,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:44:22,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:22,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:44:22,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:22,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:44:22,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:22,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:44:22,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:22,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:22,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:22,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 04:44:22,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770525384] [2020-10-13 04:44:22,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:22,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:44:22,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605725557] [2020-10-13 04:44:22,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:44:22,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:22,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:44:22,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:22,386 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 21 states. [2020-10-13 04:44:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:22,565 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-13 04:44:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:44:22,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-10-13 04:44:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:22,567 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:44:22,567 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:44:22,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:44:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-13 04:44:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:44:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-13 04:44:22,572 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-13 04:44:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:22,573 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-13 04:44:22,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:44:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-13 04:44:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:44:22,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:22,574 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:22,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:44:22,574 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:22,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:22,575 INFO L82 PathProgramCache]: Analyzing trace with hash 952094080, now seen corresponding path program 34 times [2020-10-13 04:44:22,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:22,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729709325] [2020-10-13 04:44:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:22,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:27,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:27,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:44:27,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:27,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:27,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:27,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:44:27,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729709325] [2020-10-13 04:44:27,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:27,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:44:27,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198960220] [2020-10-13 04:44:27,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:44:27,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:27,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:44:27,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:27,859 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 21 states. [2020-10-13 04:44:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:28,000 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-13 04:44:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:44:28,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-13 04:44:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:28,002 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:44:28,002 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:44:28,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:44:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:44:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:44:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-13 04:44:28,008 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-10-13 04:44:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:28,008 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-13 04:44:28,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:44:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-13 04:44:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:44:28,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:28,009 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:28,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:44:28,010 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 164328670, now seen corresponding path program 35 times [2020-10-13 04:44:28,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:28,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744704974] [2020-10-13 04:44:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:28,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:33,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:44:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:44:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:33,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:33,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:33,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:33,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:33,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:33,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:44:33,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744704974] [2020-10-13 04:44:33,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:33,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:44:33,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923599065] [2020-10-13 04:44:33,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:44:33,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:44:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:44:33,319 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 22 states. [2020-10-13 04:44:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:33,437 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-13 04:44:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:44:33,438 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-10-13 04:44:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:33,440 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:44:33,440 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:44:33,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:44:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:44:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 04:44:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:44:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-13 04:44:33,446 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-13 04:44:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:33,446 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-13 04:44:33,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:44:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-13 04:44:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:44:33,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:33,448 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:33,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:44:33,448 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash -963986244, now seen corresponding path program 36 times [2020-10-13 04:44:33,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:33,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028601596] [2020-10-13 04:44:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:34,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:38,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:38,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:44:38,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 04:44:38,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:44:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:44:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:38,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:38,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:38,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:38,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:44:38,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028601596] [2020-10-13 04:44:38,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:38,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:44:38,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803296366] [2020-10-13 04:44:38,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:44:38,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:44:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:44:38,796 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 22 states. [2020-10-13 04:44:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:38,914 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-10-13 04:44:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:44:38,914 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2020-10-13 04:44:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:38,915 INFO L225 Difference]: With dead ends: 148 [2020-10-13 04:44:38,915 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:44:38,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:44:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:44:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-13 04:44:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:44:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-13 04:44:38,927 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-10-13 04:44:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:38,927 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-13 04:44:38,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:44:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-13 04:44:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:44:38,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:38,928 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:38,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:44:38,929 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash -768457382, now seen corresponding path program 37 times [2020-10-13 04:44:38,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:38,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399686759] [2020-10-13 04:44:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:39,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:43,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:43,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:44:43,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:43,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 04:44:43,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:44:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:44:43,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:44,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:44,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:44,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:44,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:44,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:44,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:44,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:44:44,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399686759] [2020-10-13 04:44:44,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:44,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:44:44,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712316849] [2020-10-13 04:44:44,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:44:44,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:44,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:44:44,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:44,319 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 23 states. [2020-10-13 04:44:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:44,497 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-10-13 04:44:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:44:44,497 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-10-13 04:44:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:44,499 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:44:44,499 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:44:44,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:44:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 04:44:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:44:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-13 04:44:44,508 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-13 04:44:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:44,509 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-13 04:44:44,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:44:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-13 04:44:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 04:44:44,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:44,511 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:44,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:44:44,512 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1843782024, now seen corresponding path program 38 times [2020-10-13 04:44:44,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:44,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007042131] [2020-10-13 04:44:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:49,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:49,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 04:44:49,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 04:44:49,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:44:49,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:44:49,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:44:49,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:49,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:49,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:49,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:49,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:49,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:49,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:49,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 04:44:49,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007042131] [2020-10-13 04:44:49,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:49,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:44:49,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678398994] [2020-10-13 04:44:49,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:44:49,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:44:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:49,897 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 23 states. [2020-10-13 04:44:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:50,071 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-13 04:44:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:44:50,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-10-13 04:44:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:50,073 INFO L225 Difference]: With dead ends: 112 [2020-10-13 04:44:50,073 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:44:50,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:44:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 04:44:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:44:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-13 04:44:50,078 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-13 04:44:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:50,078 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-13 04:44:50,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:44:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-13 04:44:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:44:50,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:50,079 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:50,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:44:50,080 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1976920022, now seen corresponding path program 39 times [2020-10-13 04:44:50,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:50,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565620238] [2020-10-13 04:44:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:55,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:44:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:55,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:55,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:55,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:55,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:55,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:55,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:55,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:55,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 04:44:55,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565620238] [2020-10-13 04:44:55,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:55,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:44:55,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639552978] [2020-10-13 04:44:55,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:44:55,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:44:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:44:55,479 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 24 states. [2020-10-13 04:44:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:55,614 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2020-10-13 04:44:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:44:55,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 95 [2020-10-13 04:44:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:55,616 INFO L225 Difference]: With dead ends: 156 [2020-10-13 04:44:55,616 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:44:55,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:44:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:44:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 04:44:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:44:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-13 04:44:55,623 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-13 04:44:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:55,624 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-13 04:44:55,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:44:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-13 04:44:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:44:55,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:55,626 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:55,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:44:55,627 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:55,627 INFO L82 PathProgramCache]: Analyzing trace with hash -573603340, now seen corresponding path program 40 times [2020-10-13 04:44:55,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:55,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211475730] [2020-10-13 04:44:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:55,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:57,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:00,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:45:00,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:01,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:01,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:01,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:01,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:01,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:01,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:01,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:01,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:01,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:01,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:45:01,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211475730] [2020-10-13 04:45:01,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:01,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:45:01,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014837494] [2020-10-13 04:45:01,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:45:01,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:45:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:45:01,034 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 24 states. [2020-10-13 04:45:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:01,236 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-13 04:45:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:45:01,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-13 04:45:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:01,237 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:45:01,237 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:45:01,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:45:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:45:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:45:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:45:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-13 04:45:01,244 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-13 04:45:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:01,246 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-13 04:45:01,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:45:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-13 04:45:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:45:01,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:01,247 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:01,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:45:01,248 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1447044014, now seen corresponding path program 41 times [2020-10-13 04:45:01,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:01,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050437637] [2020-10-13 04:45:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:06,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:06,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:45:06,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:06,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:45:06,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:45:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:45:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:45:06,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:06,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:06,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:06,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:06,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:06,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:06,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:06,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:06,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:45:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:45:06,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050437637] [2020-10-13 04:45:06,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:06,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:45:06,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199791320] [2020-10-13 04:45:06,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:45:06,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:45:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:45:06,689 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 25 states. [2020-10-13 04:45:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:06,912 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-10-13 04:45:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:45:06,912 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-13 04:45:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:06,913 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:45:06,913 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:45:06,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:45:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:45:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:45:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:45:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-13 04:45:06,918 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-13 04:45:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:06,918 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-13 04:45:06,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:45:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-13 04:45:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:45:06,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:06,919 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:06,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:45:06,919 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 990058288, now seen corresponding path program 42 times [2020-10-13 04:45:06,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:06,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339438458] [2020-10-13 04:45:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:06,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:08,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:45:11,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:11,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 04:45:11,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:45:11,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:11,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:45:11,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:12,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 04:45:12,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339438458] [2020-10-13 04:45:12,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:12,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:45:12,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026431348] [2020-10-13 04:45:12,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:45:12,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:45:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:45:12,360 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 25 states. [2020-10-13 04:45:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:12,502 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2020-10-13 04:45:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:45:12,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2020-10-13 04:45:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:12,504 INFO L225 Difference]: With dead ends: 166 [2020-10-13 04:45:12,504 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:45:12,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:45:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:45:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 04:45:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:45:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-13 04:45:12,510 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-13 04:45:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:12,511 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-13 04:45:12,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:45:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-13 04:45:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:45:12,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:12,512 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:12,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:45:12,512 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash -730029362, now seen corresponding path program 43 times [2020-10-13 04:45:12,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:12,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771780203] [2020-10-13 04:45:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:12,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:45:17,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:18,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:18,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:18,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:18,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:18,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:18,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:18,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:18,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 04:45:18,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771780203] [2020-10-13 04:45:18,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:18,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:45:18,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979032943] [2020-10-13 04:45:18,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:45:18,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:45:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:45:18,062 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 26 states. [2020-10-13 04:45:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:18,285 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-10-13 04:45:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:45:18,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 103 [2020-10-13 04:45:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:18,287 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:45:18,287 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 04:45:18,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:45:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 04:45:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 04:45:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:45:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-13 04:45:18,294 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-13 04:45:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:18,294 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-13 04:45:18,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:45:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-13 04:45:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 04:45:18,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:18,296 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:18,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:45:18,296 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:18,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1448595796, now seen corresponding path program 44 times [2020-10-13 04:45:18,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:18,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768233035] [2020-10-13 04:45:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:18,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:20,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:23,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 04:45:23,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:23,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 04:45:23,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:23,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:45:23,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:23,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:45:23,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:45:23,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768233035] [2020-10-13 04:45:23,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:23,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:45:23,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728259641] [2020-10-13 04:45:23,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:45:23,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:23,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:45:23,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:45:23,761 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 26 states. [2020-10-13 04:45:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:23,925 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-10-13 04:45:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:45:23,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 105 [2020-10-13 04:45:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:23,927 INFO L225 Difference]: With dead ends: 172 [2020-10-13 04:45:23,927 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:45:23,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:45:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:45:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 04:45:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:45:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-13 04:45:23,933 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-13 04:45:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:23,933 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-13 04:45:23,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:45:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-13 04:45:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:45:23,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:23,935 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:23,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:45:23,935 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:23,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1911112886, now seen corresponding path program 45 times [2020-10-13 04:45:23,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:23,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384398356] [2020-10-13 04:45:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:25,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:29,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:29,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:45:29,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-13 04:45:29,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:45:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:45:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:45:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:29,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:29,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:29,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:29,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:45:29,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384398356] [2020-10-13 04:45:29,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:29,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:45:29,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821834396] [2020-10-13 04:45:29,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:45:29,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:29,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:45:29,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:45:29,429 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 27 states. [2020-10-13 04:45:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:29,639 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2020-10-13 04:45:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:45:29,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 107 [2020-10-13 04:45:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:29,641 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:45:29,641 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:45:29,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:45:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:45:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 04:45:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:45:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-13 04:45:29,647 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-13 04:45:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:29,648 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-13 04:45:29,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:45:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-13 04:45:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:45:29,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:29,649 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:29,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:45:29,649 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1696471080, now seen corresponding path program 46 times [2020-10-13 04:45:29,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:29,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630817135] [2020-10-13 04:45:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:31,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:34,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:34,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:45:34,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:34,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 04:45:34,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:45:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:45:34,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:35,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:35,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:35,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:35,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:45:35,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630817135] [2020-10-13 04:45:35,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:35,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:45:35,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143468819] [2020-10-13 04:45:35,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:45:35,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:35,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:45:35,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:45:35,107 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 27 states. [2020-10-13 04:45:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:35,339 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-10-13 04:45:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:45:35,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-13 04:45:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:35,341 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:45:35,341 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 04:45:35,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:45:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 04:45:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 04:45:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:45:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-13 04:45:35,346 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-10-13 04:45:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:35,346 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-13 04:45:35,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:45:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-13 04:45:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:45:35,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:35,347 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:35,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:45:35,348 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash 538518982, now seen corresponding path program 47 times [2020-10-13 04:45:35,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:35,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206336430] [2020-10-13 04:45:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:45:40,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:40,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:45:40,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:45:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:45:40,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:40,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:40,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:40,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:40,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:40,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:45:40,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206336430] [2020-10-13 04:45:40,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:40,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:45:40,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632823529] [2020-10-13 04:45:40,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:45:40,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:45:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:45:40,821 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 28 states. [2020-10-13 04:45:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:40,960 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2020-10-13 04:45:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:45:40,961 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2020-10-13 04:45:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:40,962 INFO L225 Difference]: With dead ends: 180 [2020-10-13 04:45:40,962 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:45:40,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:45:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:45:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-13 04:45:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:45:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-13 04:45:40,968 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-13 04:45:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:40,968 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-13 04:45:40,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:45:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-13 04:45:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 04:45:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:40,970 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:40,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:45:40,970 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:40,970 INFO L82 PathProgramCache]: Analyzing trace with hash 143082468, now seen corresponding path program 48 times [2020-10-13 04:45:40,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:40,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534038745] [2020-10-13 04:45:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:40,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:43,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:46,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:45:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:46,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:46,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:46,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:46,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:46,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:46,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:46,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:46,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:46,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:46,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:45:46,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534038745] [2020-10-13 04:45:46,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:46,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:45:46,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575211401] [2020-10-13 04:45:46,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:45:46,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:45:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:45:46,497 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 28 states. [2020-10-13 04:45:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:46,718 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2020-10-13 04:45:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:45:46,718 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 113 [2020-10-13 04:45:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:46,720 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:45:46,720 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:45:46,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:45:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:45:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 04:45:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:45:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-13 04:45:46,725 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2020-10-13 04:45:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:46,725 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-13 04:45:46,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:45:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-13 04:45:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:45:46,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:46,726 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:46,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:45:46,727 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash 93250114, now seen corresponding path program 49 times [2020-10-13 04:45:46,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:46,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875088578] [2020-10-13 04:45:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:51,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:45:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:52,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:52,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:52,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:52,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:45:52,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875088578] [2020-10-13 04:45:52,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:52,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:45:52,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469247163] [2020-10-13 04:45:52,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:45:52,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:45:52,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:52,269 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 29 states. [2020-10-13 04:45:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:52,490 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-10-13 04:45:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:45:52,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-13 04:45:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:52,492 INFO L225 Difference]: With dead ends: 186 [2020-10-13 04:45:52,492 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:45:52,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:45:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 04:45:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:45:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-13 04:45:52,498 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-13 04:45:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:52,498 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-13 04:45:52,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:45:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-13 04:45:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 04:45:52,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:52,499 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:52,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:45:52,499 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1352351392, now seen corresponding path program 50 times [2020-10-13 04:45:52,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:52,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311199464] [2020-10-13 04:45:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:55,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:57,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:57,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 04:45:57,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:57,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 04:45:57,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:45:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:45:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:45:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:58,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:58,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:58,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:58,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:58,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:58,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:45:58,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311199464] [2020-10-13 04:45:58,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:58,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:45:58,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094231121] [2020-10-13 04:45:58,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:45:58,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:58,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:45:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:58,054 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 29 states. [2020-10-13 04:45:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:58,278 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-10-13 04:45:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:45:58,279 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 117 [2020-10-13 04:45:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:58,281 INFO L225 Difference]: With dead ends: 136 [2020-10-13 04:45:58,281 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:45:58,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:45:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 04:45:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:45:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-13 04:45:58,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-13 04:45:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:58,287 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-13 04:45:58,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:45:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-13 04:45:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:45:58,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:58,288 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:58,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:45:58,288 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1795354814, now seen corresponding path program 51 times [2020-10-13 04:45:58,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:58,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775847567] [2020-10-13 04:45:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:03,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:46:03,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:03,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:03,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:03,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:46:03,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775847567] [2020-10-13 04:46:03,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:03,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:46:03,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716367052] [2020-10-13 04:46:03,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:46:03,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:46:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:46:03,865 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 30 states. [2020-10-13 04:46:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:04,096 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-10-13 04:46:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:46:04,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 119 [2020-10-13 04:46:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:04,098 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:46:04,098 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 04:46:04,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:46:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 04:46:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-13 04:46:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:46:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-13 04:46:04,102 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-13 04:46:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:04,103 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-13 04:46:04,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:46:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-13 04:46:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:46:04,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:04,104 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:04,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:46:04,104 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1786253532, now seen corresponding path program 52 times [2020-10-13 04:46:04,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:04,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011287239] [2020-10-13 04:46:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:09,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:46:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:46:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:09,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:09,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:09,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:09,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:09,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:09,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:09,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 04:46:09,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011287239] [2020-10-13 04:46:09,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:09,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:46:09,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202279023] [2020-10-13 04:46:09,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:46:09,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:46:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:46:09,660 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 30 states. [2020-10-13 04:46:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:09,888 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2020-10-13 04:46:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:46:09,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2020-10-13 04:46:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:09,890 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:46:09,890 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:46:09,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:46:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:46:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 04:46:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:46:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-13 04:46:09,896 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 121 [2020-10-13 04:46:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:09,897 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-13 04:46:09,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:46:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-13 04:46:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:46:09,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:09,899 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:09,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:46:09,899 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1367322310, now seen corresponding path program 53 times [2020-10-13 04:46:09,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:09,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584700593] [2020-10-13 04:46:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:10,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:46:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:46:14,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:15,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:15,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:15,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:15,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:15,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:15,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:15,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:15,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:15,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:15,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:15,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 04:46:15,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584700593] [2020-10-13 04:46:15,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:15,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:46:15,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343176011] [2020-10-13 04:46:15,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:46:15,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:46:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:46:15,506 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 31 states. [2020-10-13 04:46:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:15,762 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-10-13 04:46:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:46:15,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 123 [2020-10-13 04:46:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:15,764 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:46:15,764 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 04:46:15,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:46:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 04:46:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 04:46:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:46:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-13 04:46:15,769 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-13 04:46:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:15,769 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-13 04:46:15,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:46:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-13 04:46:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 04:46:15,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:15,771 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:15,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 04:46:15,771 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1341377960, now seen corresponding path program 54 times [2020-10-13 04:46:15,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:15,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354158295] [2020-10-13 04:46:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:15,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:20,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:20,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 04:46:20,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:46:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-13 04:46:20,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:46:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 04:46:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:46:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:21,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:21,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:21,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:21,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:21,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:21,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:46:21,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:21,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:21,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:21,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:21,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 04:46:21,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354158295] [2020-10-13 04:46:21,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:21,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:46:21,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581496239] [2020-10-13 04:46:21,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:46:21,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:46:21,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:46:21,559 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 31 states. [2020-10-13 04:46:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:21,853 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2020-10-13 04:46:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:46:21,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-13 04:46:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:21,856 INFO L225 Difference]: With dead ends: 144 [2020-10-13 04:46:21,856 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:46:21,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:46:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:46:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-13 04:46:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:46:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-13 04:46:21,863 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 125 [2020-10-13 04:46:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:21,864 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-13 04:46:21,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:46:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-13 04:46:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 04:46:21,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:21,866 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:21,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 04:46:21,869 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -544078922, now seen corresponding path program 55 times [2020-10-13 04:46:21,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:21,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366100170] [2020-10-13 04:46:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking...