/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:11:34,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:11:34,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:11:34,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:11:34,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:11:34,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:11:34,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:11:34,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:11:34,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:11:34,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:11:34,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:11:34,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:11:34,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:11:34,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:11:34,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:11:34,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:11:34,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:11:34,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:11:34,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:11:34,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:11:34,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:11:34,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:11:34,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:11:34,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:11:34,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:11:34,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:11:34,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:11:34,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:11:34,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:11:34,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:11:34,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:11:34,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:11:34,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:11:34,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:11:34,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:11:34,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:11:34,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:11:34,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:11:34,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:11:34,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:11:34,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:11:34,523 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 11:11:34,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:11:34,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:11:34,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:11:34,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:11:34,548 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:11:34,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:11:34,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:11:34,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:11:34,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:11:34,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:11:34,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:11:34,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:11:34,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:11:34,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:11:34,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:11:34,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:11:34,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:11:34,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:11:34,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:11:34,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:11:34,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:11:34,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:11:34,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:11:34,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:11:34,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:11:34,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:11:34,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:11:34,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:11:34,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:11:34,553 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 11:11:34,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:11:34,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:11:34,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:11:34,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:11:34,892 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:11:34,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2020-10-13 11:11:34,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd2645c51/5d5122db17a24559bbb1fa5ecf49cd81/FLAG25fa53f74 [2020-10-13 11:11:35,474 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:11:35,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-1.i [2020-10-13 11:11:35,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd2645c51/5d5122db17a24559bbb1fa5ecf49cd81/FLAG25fa53f74 [2020-10-13 11:11:35,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd2645c51/5d5122db17a24559bbb1fa5ecf49cd81 [2020-10-13 11:11:35,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:11:35,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:11:35,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:35,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:11:35,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:11:35,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:35" (1/1) ... [2020-10-13 11:11:35,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e85302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:35, skipping insertion in model container [2020-10-13 11:11:35,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:35" (1/1) ... [2020-10-13 11:11:35,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:11:35,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:11:36,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:36,192 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:11:36,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:36,359 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:11:36,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36 WrapperNode [2020-10-13 11:11:36,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:36,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:11:36,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:11:36,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:11:36,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (1/1) ... [2020-10-13 11:11:36,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:11:36,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:11:36,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:11:36,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:11:36,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (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 11:11:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:11:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:11:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 11:11:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:11:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:11:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:11:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 11:11:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 11:11:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:11:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 11:11:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:11:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 11:11:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-13 11:11:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:11:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:11:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:11:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:11:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:11:36,929 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:11:36,929 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 11:11:36,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:36 BoogieIcfgContainer [2020-10-13 11:11:36,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:11:36,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:11:36,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:11:36,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:11:36,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:11:35" (1/3) ... [2020-10-13 11:11:36,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f7993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:36, skipping insertion in model container [2020-10-13 11:11:36,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:36" (2/3) ... [2020-10-13 11:11:36,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f7993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:36, skipping insertion in model container [2020-10-13 11:11:36,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:36" (3/3) ... [2020-10-13 11:11:36,946 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2020-10-13 11:11:36,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:11:36,977 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:11:36,992 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:11:37,025 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:11:37,026 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:11:37,028 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:11:37,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:11:37,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:11:37,029 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:11:37,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:11:37,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:11:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 11:11:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 11:11:37,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:37,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:37,055 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1745945109, now seen corresponding path program 1 times [2020-10-13 11:11:37,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:37,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670061186] [2020-10-13 11:11:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:37,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:37,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:37,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:37,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:11:37,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:11:37,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-13 11:11:37,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:11:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:37,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 11:11:37,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:37,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:37,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:37,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:37,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:11:37,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:37,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:37,897 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 11:11:37,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670061186] [2020-10-13 11:11:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:37,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:11:37,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184077193] [2020-10-13 11:11:37,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:11:37,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:11:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:11:37,926 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 11:11:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:38,065 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2020-10-13 11:11:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:11:38,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-13 11:11:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:38,076 INFO L225 Difference]: With dead ends: 66 [2020-10-13 11:11:38,077 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 11:11:38,080 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 11:11:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 11:11:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 11:11:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 11:11:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-13 11:11:38,123 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2020-10-13 11:11:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:38,123 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-13 11:11:38,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:11:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-13 11:11:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:11:38,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:38,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:38,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:11:38,126 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1772446864, now seen corresponding path program 1 times [2020-10-13 11:11:38,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:38,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818683947] [2020-10-13 11:11:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:38,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:38,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:38,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:11:38,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:38,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-13 11:11:38,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:38,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:11:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:11:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:11:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:11:38,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:38,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:38,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:38,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:38,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:38,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:11:38,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:38,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:38,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:38,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:38,591 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 11:11:38,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818683947] [2020-10-13 11:11:38,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:38,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:11:38,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573263961] [2020-10-13 11:11:38,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:11:38,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:11:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:11:38,602 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-10-13 11:11:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:38,766 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-10-13 11:11:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:11:38,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 11:11:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:38,770 INFO L225 Difference]: With dead ends: 67 [2020-10-13 11:11:38,770 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 11:11:38,771 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 11:11:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 11:11:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-10-13 11:11:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 11:11:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-13 11:11:38,780 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-10-13 11:11:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:38,780 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-13 11:11:38,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:11:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-13 11:11:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 11:11:38,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:38,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:38,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:11:38,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash -974231694, now seen corresponding path program 1 times [2020-10-13 11:11:38,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:38,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013775827] [2020-10-13 11:11:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:38,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:38,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:39,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:11:39,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:39,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-13 11:11:39,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:11:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:11:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 11:11:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:39,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:39,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:39,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:39,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:39,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:39,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:39,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013775827] [2020-10-13 11:11:39,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:39,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:11:39,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814468013] [2020-10-13 11:11:39,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:11:39,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:11:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:11:39,267 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2020-10-13 11:11:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:39,437 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-10-13 11:11:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:11:39,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 11:11:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:39,440 INFO L225 Difference]: With dead ends: 82 [2020-10-13 11:11:39,440 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 11:11:39,441 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 11:11:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 11:11:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2020-10-13 11:11:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 11:11:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-13 11:11:39,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2020-10-13 11:11:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:39,450 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-13 11:11:39,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:11:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-13 11:11:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:11:39,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:39,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:39,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:11:39,452 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1606367988, now seen corresponding path program 2 times [2020-10-13 11:11:39,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:39,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670881655] [2020-10-13 11:11:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:39,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 11:11:39,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-13 11:11:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:11:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:11:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:11:39,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:40,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:40,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:40,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:40,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:40,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:40,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:40,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:40,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:40,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670881655] [2020-10-13 11:11:40,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:40,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:11:40,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664187166] [2020-10-13 11:11:40,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:11:40,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:11:40,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:11:40,066 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-10-13 11:11:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:40,253 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2020-10-13 11:11:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:11:40,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 11:11:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:40,256 INFO L225 Difference]: With dead ends: 97 [2020-10-13 11:11:40,256 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 11:11:40,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:11:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 11:11:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2020-10-13 11:11:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:11:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-10-13 11:11:40,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2020-10-13 11:11:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:40,266 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-10-13 11:11:40,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:11:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-10-13 11:11:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 11:11:40,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:40,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:40,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:11:40,268 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash -928434698, now seen corresponding path program 3 times [2020-10-13 11:11:40,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:40,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007333408] [2020-10-13 11:11:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:41,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:41,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:11:41,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:41,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-13 11:11:41,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:11:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:11:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:11:41,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:41,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:41,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:41,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:41,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:41,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:41,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:41,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:41,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:41,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007333408] [2020-10-13 11:11:41,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:41,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:11:41,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685453276] [2020-10-13 11:11:41,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:11:41,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:11:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:11:41,162 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 7 states. [2020-10-13 11:11:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:41,444 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2020-10-13 11:11:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:11:41,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 11:11:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:41,446 INFO L225 Difference]: With dead ends: 112 [2020-10-13 11:11:41,446 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 11:11:41,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:11:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 11:11:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2020-10-13 11:11:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 11:11:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 11:11:41,458 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2020-10-13 11:11:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:41,459 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 11:11:41,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:11:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 11:11:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:11:41,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:41,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:41,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:11:41,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1627359112, now seen corresponding path program 4 times [2020-10-13 11:11:41,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:41,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566566819] [2020-10-13 11:11:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:41,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:42,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:42,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:11:42,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:42,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-13 11:11:42,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:42,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:11:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 11:11:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:11:42,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:42,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:42,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:42,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:42,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:42,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:42,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:42,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 11:11:42,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566566819] [2020-10-13 11:11:42,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:42,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:11:42,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312069523] [2020-10-13 11:11:42,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:11:42,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:11:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:11:42,441 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 7 states. [2020-10-13 11:11:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:42,614 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-10-13 11:11:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:11:42,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 11:11:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:42,616 INFO L225 Difference]: With dead ends: 61 [2020-10-13 11:11:42,616 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 11:11:42,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:11:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 11:11:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-13 11:11:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 11:11:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-13 11:11:42,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 28 [2020-10-13 11:11:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:42,624 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-13 11:11:42,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:11:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-13 11:11:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:11:42,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:42,626 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:42,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:11:42,627 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash 755611377, now seen corresponding path program 1 times [2020-10-13 11:11:42,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:42,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173728188] [2020-10-13 11:11:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:42,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:42,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:42,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:47,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:11:47,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:11:47,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 11:11:47,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:47,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:11:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 11:11:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:11:47,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:47,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:47,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:47,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:47,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:47,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:47,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:47,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:47,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:47,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:47,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 11:11:47,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173728188] [2020-10-13 11:11:47,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:47,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:11:47,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416994755] [2020-10-13 11:11:47,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:11:47,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:11:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:11:47,754 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 4 states. [2020-10-13 11:11:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:47,873 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2020-10-13 11:11:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:11:47,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-13 11:11:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:47,876 INFO L225 Difference]: With dead ends: 96 [2020-10-13 11:11:47,876 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 11:11:47,877 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 11:11:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 11:11:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2020-10-13 11:11:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:11:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-10-13 11:11:47,884 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 34 [2020-10-13 11:11:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:47,884 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-10-13 11:11:47,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:11:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-10-13 11:11:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 11:11:47,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:47,886 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:47,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:11:47,886 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash -174646815, now seen corresponding path program 1 times [2020-10-13 11:11:47,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:47,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938415874] [2020-10-13 11:11:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:52,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:52,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:11:52,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:11:52,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:11:52,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:11:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 11:11:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:11:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:52,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:52,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:52,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:52,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:52,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:52,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:52,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:52,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 11:11:52,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938415874] [2020-10-13 11:11:52,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:52,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:11:52,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879132756] [2020-10-13 11:11:52,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:11:52,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:11:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:11:52,987 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 5 states. [2020-10-13 11:11:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:53,099 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2020-10-13 11:11:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:11:53,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-13 11:11:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:53,101 INFO L225 Difference]: With dead ends: 106 [2020-10-13 11:11:53,101 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 11:11:53,102 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 11:11:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 11:11:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-13 11:11:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 11:11:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-13 11:11:53,110 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 35 [2020-10-13 11:11:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:53,111 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-13 11:11:53,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:11:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-13 11:11:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:11:53,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:53,112 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:53,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:11:53,112 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash -157822006, now seen corresponding path program 2 times [2020-10-13 11:11:53,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:53,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977048525] [2020-10-13 11:11:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:53,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:53,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:53,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:54,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:11:58,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:11:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:11:58,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:11:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 11:11:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 11:11:58,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,550 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-13 11:11:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:58,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 11:11:58,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:58,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:58,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:58,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 11:11:58,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977048525] [2020-10-13 11:11:58,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:58,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 11:11:58,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125299427] [2020-10-13 11:11:58,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:11:58,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:11:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:11:58,759 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 9 states. [2020-10-13 11:11:58,979 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-13 11:11:59,137 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-13 11:11:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:59,286 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2020-10-13 11:11:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:11:59,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-13 11:11:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:59,288 INFO L225 Difference]: With dead ends: 133 [2020-10-13 11:11:59,288 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 11:11:59,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:11:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 11:11:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2020-10-13 11:11:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 11:11:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-13 11:11:59,311 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 38 [2020-10-13 11:11:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:59,313 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-13 11:11:59,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:11:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-10-13 11:11:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:11:59,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:59,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:59,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:11:59,317 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:59,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1149782992, now seen corresponding path program 1 times [2020-10-13 11:11:59,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:59,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102839043] [2020-10-13 11:11:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:59,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:01,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:04,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:04,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 11:12:04,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 11:12:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:12:04,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:12:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:12:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:12:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:04,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:04,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:04,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:04,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:04,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:04,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:04,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:04,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:04,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 11:12:04,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102839043] [2020-10-13 11:12:04,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:04,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:12:04,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105925802] [2020-10-13 11:12:04,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:12:04,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:12:04,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:12:04,461 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 8 states. [2020-10-13 11:12:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:04,857 INFO L93 Difference]: Finished difference Result 323 states and 427 transitions. [2020-10-13 11:12:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:12:04,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 11:12:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:04,860 INFO L225 Difference]: With dead ends: 323 [2020-10-13 11:12:04,860 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 11:12:04,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:12:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 11:12:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 70. [2020-10-13 11:12:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 11:12:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-10-13 11:12:04,885 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 39 [2020-10-13 11:12:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:04,885 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-10-13 11:12:04,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:12:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-10-13 11:12:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:12:04,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:04,887 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:04,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:12:04,887 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 186389742, now seen corresponding path program 2 times [2020-10-13 11:12:04,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:04,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868786668] [2020-10-13 11:12:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:04,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:05,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:05,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:05,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:07,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:09,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:09,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:12:09,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:12:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 11:12:09,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:12:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 11:12:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:12:09,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:10,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:10,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:10,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:10,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:10,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:10,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:10,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:12:10,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868786668] [2020-10-13 11:12:10,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:10,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:12:10,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753598648] [2020-10-13 11:12:10,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:12:10,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:12:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:12:10,335 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 11 states. [2020-10-13 11:12:12,591 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-13 11:12:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:13,342 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2020-10-13 11:12:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:12:13,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-13 11:12:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:13,345 INFO L225 Difference]: With dead ends: 155 [2020-10-13 11:12:13,345 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 11:12:13,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:12:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 11:12:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2020-10-13 11:12:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 11:12:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2020-10-13 11:12:13,386 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 41 [2020-10-13 11:12:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:13,386 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2020-10-13 11:12:13,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:12:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2020-10-13 11:12:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:12:13,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:13,389 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:13,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:12:13,389 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 733891861, now seen corresponding path program 3 times [2020-10-13 11:12:13,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:13,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165920490] [2020-10-13 11:12:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:13,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:13,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:13,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:16,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:17,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:18,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:12:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 11:12:18,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:12:18,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:18,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:18,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:18,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:18,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 11:12:18,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165920490] [2020-10-13 11:12:18,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:18,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:12:18,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001426573] [2020-10-13 11:12:18,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:12:18,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:12:18,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:12:18,522 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand 7 states. [2020-10-13 11:12:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:18,803 INFO L93 Difference]: Finished difference Result 216 states and 280 transitions. [2020-10-13 11:12:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:12:18,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-10-13 11:12:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:18,807 INFO L225 Difference]: With dead ends: 216 [2020-10-13 11:12:18,807 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 11:12:18,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:12:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 11:12:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 107. [2020-10-13 11:12:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 11:12:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2020-10-13 11:12:18,828 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 50 [2020-10-13 11:12:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:18,828 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2020-10-13 11:12:18,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:12:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2020-10-13 11:12:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:18,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:18,830 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:18,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:12:18,830 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash 994759872, now seen corresponding path program 1 times [2020-10-13 11:12:18,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:18,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365365856] [2020-10-13 11:12:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:18,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:19,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:19,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:20,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:21,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:21,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:22,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:23,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:23,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:23,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 11:12:23,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 11:12:23,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:23,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:12:23,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:12:23,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:12:23,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:12:24,219 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-10-13 11:12:24,473 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-10-13 11:12:24,720 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-10-13 11:12:24,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:24,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:24,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:24,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:24,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:24,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:24,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:24,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:12:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 11:12:24,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365365856] [2020-10-13 11:12:24,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:24,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:12:24,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415108094] [2020-10-13 11:12:24,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:12:24,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:12:24,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:12:24,809 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand 8 states. [2020-10-13 11:12:25,273 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-13 11:12:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:25,567 INFO L93 Difference]: Finished difference Result 153 states and 195 transitions. [2020-10-13 11:12:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:12:25,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-13 11:12:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:25,569 INFO L225 Difference]: With dead ends: 153 [2020-10-13 11:12:25,569 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 11:12:25,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:12:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 11:12:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-13 11:12:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 11:12:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2020-10-13 11:12:25,596 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 51 [2020-10-13 11:12:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:25,597 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2020-10-13 11:12:25,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:12:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2020-10-13 11:12:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:25,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:25,599 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:25,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:12:25,599 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1213614590, now seen corresponding path program 1 times [2020-10-13 11:12:25,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:25,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982410132] [2020-10-13 11:12:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:25,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:25,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:25,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:26,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:26,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:26,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:26,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:27,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:27,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:29,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:29,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:30,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:30,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:30,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:30,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-13 11:12:30,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:12:30,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:12:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 11:12:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:12:30,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:31,044 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-13 11:12:31,183 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-13 11:12:31,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:31,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:31,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:31,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:31,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:31,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:12:31,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982410132] [2020-10-13 11:12:31,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:31,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:12:31,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327799257] [2020-10-13 11:12:31,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:12:31,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:12:31,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:12:31,378 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand 11 states. [2020-10-13 11:12:31,721 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 11:12:32,098 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-13 11:12:32,808 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 11:12:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:32,940 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2020-10-13 11:12:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:12:32,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-13 11:12:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:32,942 INFO L225 Difference]: With dead ends: 174 [2020-10-13 11:12:32,942 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 11:12:32,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:12:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 11:12:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 150. [2020-10-13 11:12:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 11:12:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2020-10-13 11:12:32,970 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 51 [2020-10-13 11:12:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:32,970 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2020-10-13 11:12:32,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:12:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2020-10-13 11:12:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:32,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:32,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:32,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:12:32,972 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash 820587580, now seen corresponding path program 1 times [2020-10-13 11:12:32,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:32,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070288785] [2020-10-13 11:12:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:33,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:12:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:33,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:33,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:33,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:33,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:33,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:33,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:33,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 11:12:33,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070288785] [2020-10-13 11:12:33,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:33,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:12:33,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976421080] [2020-10-13 11:12:33,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:12:33,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:33,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:12:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:12:33,410 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand 9 states. [2020-10-13 11:12:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:33,760 INFO L93 Difference]: Finished difference Result 265 states and 344 transitions. [2020-10-13 11:12:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:12:33,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-13 11:12:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:33,762 INFO L225 Difference]: With dead ends: 265 [2020-10-13 11:12:33,762 INFO L226 Difference]: Without dead ends: 260 [2020-10-13 11:12:33,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:12:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-13 11:12:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 212. [2020-10-13 11:12:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 11:12:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 274 transitions. [2020-10-13 11:12:33,800 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 274 transitions. Word has length 51 [2020-10-13 11:12:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:33,800 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 274 transitions. [2020-10-13 11:12:33,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:12:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 274 transitions. [2020-10-13 11:12:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:33,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:33,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:33,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:12:33,802 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash 233781566, now seen corresponding path program 1 times [2020-10-13 11:12:33,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:33,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045664011] [2020-10-13 11:12:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:34,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:34,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:34,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:34,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:35,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:35,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:35,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:36,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:38,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:38,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:38,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:12:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:12:38,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:12:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 11:12:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:12:38,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:39,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:39,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:39,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:39,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:39,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:39,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:39,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 11:12:39,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045664011] [2020-10-13 11:12:39,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:39,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:12:39,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964128642] [2020-10-13 11:12:39,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:12:39,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:39,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:12:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:12:39,147 INFO L87 Difference]: Start difference. First operand 212 states and 274 transitions. Second operand 10 states. [2020-10-13 11:12:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:39,591 INFO L93 Difference]: Finished difference Result 412 states and 538 transitions. [2020-10-13 11:12:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:12:39,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-13 11:12:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:39,594 INFO L225 Difference]: With dead ends: 412 [2020-10-13 11:12:39,594 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 11:12:39,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:12:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 11:12:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 258. [2020-10-13 11:12:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 11:12:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 334 transitions. [2020-10-13 11:12:39,638 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 334 transitions. Word has length 51 [2020-10-13 11:12:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:39,639 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 334 transitions. [2020-10-13 11:12:39,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:12:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 334 transitions. [2020-10-13 11:12:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:39,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:39,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:39,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:12:39,641 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1135308482, now seen corresponding path program 2 times [2020-10-13 11:12:39,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:39,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001192550] [2020-10-13 11:12:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:39,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:43,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:43,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:43,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:43,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:44,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:44,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:44,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:44,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:12:44,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 11:12:44,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:44,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:12:44,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 11:12:44,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:12:44,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:12:45,170 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2020-10-13 11:12:45,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:45,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:45,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:45,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:45,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:45,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:12:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 11:12:45,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001192550] [2020-10-13 11:12:45,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:45,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:12:45,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605075229] [2020-10-13 11:12:45,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:12:45,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:45,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:12:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:12:45,252 INFO L87 Difference]: Start difference. First operand 258 states and 334 transitions. Second operand 10 states. [2020-10-13 11:12:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:46,166 INFO L93 Difference]: Finished difference Result 416 states and 542 transitions. [2020-10-13 11:12:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:12:46,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-13 11:12:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:46,169 INFO L225 Difference]: With dead ends: 416 [2020-10-13 11:12:46,170 INFO L226 Difference]: Without dead ends: 363 [2020-10-13 11:12:46,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:12:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-13 11:12:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 278. [2020-10-13 11:12:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 11:12:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 358 transitions. [2020-10-13 11:12:46,241 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 358 transitions. Word has length 51 [2020-10-13 11:12:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:46,242 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 358 transitions. [2020-10-13 11:12:46,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:12:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 358 transitions. [2020-10-13 11:12:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:46,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:46,243 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:46,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:12:46,243 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash 155475458, now seen corresponding path program 2 times [2020-10-13 11:12:46,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:46,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016828988] [2020-10-13 11:12:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:46,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:46,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:46,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:46,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:46,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:47,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:48,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:48,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:50,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:50,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:51,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:51,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 11:12:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:12:51,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:12:51,914 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-13 11:12:52,123 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-13 11:12:52,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:12:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:52,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:52,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:52,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:12:52,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:12:52,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:12:52,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:12:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:12:52,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:12:52,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:12:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:12:52,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016828988] [2020-10-13 11:12:52,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:12:52,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:12:52,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233410673] [2020-10-13 11:12:52,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:12:52,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:12:52,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:12:52,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:12:52,222 INFO L87 Difference]: Start difference. First operand 278 states and 358 transitions. Second operand 13 states. [2020-10-13 11:12:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:12:54,594 INFO L93 Difference]: Finished difference Result 608 states and 798 transitions. [2020-10-13 11:12:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:12:54,595 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 11:12:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:12:54,598 INFO L225 Difference]: With dead ends: 608 [2020-10-13 11:12:54,598 INFO L226 Difference]: Without dead ends: 529 [2020-10-13 11:12:54,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:12:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-13 11:12:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 425. [2020-10-13 11:12:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-13 11:12:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 550 transitions. [2020-10-13 11:12:54,679 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 550 transitions. Word has length 51 [2020-10-13 11:12:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:12:54,680 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 550 transitions. [2020-10-13 11:12:54,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:12:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 550 transitions. [2020-10-13 11:12:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:12:54,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:12:54,681 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:12:54,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:12:54,682 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:12:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:12:54,682 INFO L82 PathProgramCache]: Analyzing trace with hash 767357186, now seen corresponding path program 1 times [2020-10-13 11:12:54,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:12:54,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18299016] [2020-10-13 11:12:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:12:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:12:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:55,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:55,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:55,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:55,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:55,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:55,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:56,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:56,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:56,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:58,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:58,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:59,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:12:59,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:12:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:12:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 11:12:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 11:12:59,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:12:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:12:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 11:12:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:12:59,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:00,273 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 37 [2020-10-13 11:13:00,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:00,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:13:00,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18299016] [2020-10-13 11:13:00,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:00,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:13:00,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550188954] [2020-10-13 11:13:00,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:13:00,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:13:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:13:00,538 INFO L87 Difference]: Start difference. First operand 425 states and 550 transitions. Second operand 13 states. [2020-10-13 11:13:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:01,570 INFO L93 Difference]: Finished difference Result 703 states and 905 transitions. [2020-10-13 11:13:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:13:01,571 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 11:13:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:01,574 INFO L225 Difference]: With dead ends: 703 [2020-10-13 11:13:01,574 INFO L226 Difference]: Without dead ends: 496 [2020-10-13 11:13:01,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:13:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-13 11:13:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 391. [2020-10-13 11:13:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-13 11:13:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 495 transitions. [2020-10-13 11:13:01,650 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 495 transitions. Word has length 51 [2020-10-13 11:13:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:01,650 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 495 transitions. [2020-10-13 11:13:01,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:13:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 495 transitions. [2020-10-13 11:13:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:13:01,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:01,658 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:01,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:13:01,658 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:01,658 INFO L82 PathProgramCache]: Analyzing trace with hash 954579408, now seen corresponding path program 1 times [2020-10-13 11:13:01,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:01,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183496264] [2020-10-13 11:13:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:01,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:02,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:02,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:02,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:04,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:06,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:06,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:13:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:07,022 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-13 11:13:07,208 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-13 11:13:07,372 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-13 11:13:07,516 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-13 11:13:07,769 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-10-13 11:13:08,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:08,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:08,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:08,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:08,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:08,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:08,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:08,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:08,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:08,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 11:13:08,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183496264] [2020-10-13 11:13:08,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:08,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:13:08,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917258321] [2020-10-13 11:13:08,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:13:08,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:13:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:13:08,154 INFO L87 Difference]: Start difference. First operand 391 states and 495 transitions. Second operand 17 states. [2020-10-13 11:13:08,660 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-13 11:13:09,189 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-13 11:13:09,732 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-13 11:13:10,023 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-13 11:13:10,362 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-13 11:13:10,873 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-13 11:13:11,212 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 11:13:11,459 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-13 11:13:11,854 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 11:13:12,262 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-13 11:13:12,675 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 11:13:13,027 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-13 11:13:13,423 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-13 11:13:13,831 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 11:13:14,242 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-13 11:13:14,649 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-13 11:13:15,082 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-13 11:13:15,476 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-13 11:13:15,810 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-13 11:13:16,110 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-13 11:13:16,371 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-13 11:13:16,805 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-13 11:13:17,308 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-13 11:13:17,497 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-13 11:13:17,817 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 11:13:18,095 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-13 11:13:18,438 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-13 11:13:18,761 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-13 11:13:19,001 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-13 11:13:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:19,019 INFO L93 Difference]: Finished difference Result 585 states and 731 transitions. [2020-10-13 11:13:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 11:13:19,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-13 11:13:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:19,022 INFO L225 Difference]: With dead ends: 585 [2020-10-13 11:13:19,023 INFO L226 Difference]: Without dead ends: 577 [2020-10-13 11:13:19,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=494, Invalid=2476, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 11:13:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-10-13 11:13:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 413. [2020-10-13 11:13:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-13 11:13:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 524 transitions. [2020-10-13 11:13:19,102 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 524 transitions. Word has length 52 [2020-10-13 11:13:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:19,102 INFO L479 AbstractCegarLoop]: Abstraction has 413 states and 524 transitions. [2020-10-13 11:13:19,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:13:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 524 transitions. [2020-10-13 11:13:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:13:19,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:19,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:19,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:13:19,104 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -583449708, now seen corresponding path program 2 times [2020-10-13 11:13:19,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:19,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838350846] [2020-10-13 11:13:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:19,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:19,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:22,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:22,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:23,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:13:24,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 11:13:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:13:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:24,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:24,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:24,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:24,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:24,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:24,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:24,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 11:13:24,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838350846] [2020-10-13 11:13:24,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:24,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:13:24,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318671002] [2020-10-13 11:13:24,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:13:24,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:24,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:13:24,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:13:24,911 INFO L87 Difference]: Start difference. First operand 413 states and 524 transitions. Second operand 13 states. [2020-10-13 11:13:27,707 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-13 11:13:28,050 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-13 11:13:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:31,527 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2020-10-13 11:13:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:13:31,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 11:13:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:31,534 INFO L225 Difference]: With dead ends: 834 [2020-10-13 11:13:31,534 INFO L226 Difference]: Without dead ends: 826 [2020-10-13 11:13:31,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2020-10-13 11:13:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-10-13 11:13:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 502. [2020-10-13 11:13:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-13 11:13:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 641 transitions. [2020-10-13 11:13:31,641 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 641 transitions. Word has length 52 [2020-10-13 11:13:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:31,641 INFO L479 AbstractCegarLoop]: Abstraction has 502 states and 641 transitions. [2020-10-13 11:13:31,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:13:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 641 transitions. [2020-10-13 11:13:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:13:31,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:31,643 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:31,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:13:31,643 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:31,644 INFO L82 PathProgramCache]: Analyzing trace with hash -373488889, now seen corresponding path program 2 times [2020-10-13 11:13:31,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:31,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80247709] [2020-10-13 11:13:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:31,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:34,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:34,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:35,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:36,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:36,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:13:36,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 11:13:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:13:36,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:13:36,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 11:13:36,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:13:36,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:36,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:36,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 11:13:36,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80247709] [2020-10-13 11:13:36,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:36,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:13:36,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126575671] [2020-10-13 11:13:36,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:13:36,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:13:36,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:13:36,735 INFO L87 Difference]: Start difference. First operand 502 states and 641 transitions. Second operand 6 states. [2020-10-13 11:13:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:36,973 INFO L93 Difference]: Finished difference Result 856 states and 1098 transitions. [2020-10-13 11:13:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:13:36,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-13 11:13:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:36,977 INFO L225 Difference]: With dead ends: 856 [2020-10-13 11:13:36,977 INFO L226 Difference]: Without dead ends: 425 [2020-10-13 11:13:36,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:13:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-13 11:13:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 383. [2020-10-13 11:13:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-13 11:13:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 460 transitions. [2020-10-13 11:13:37,073 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 460 transitions. Word has length 54 [2020-10-13 11:13:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:37,073 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 460 transitions. [2020-10-13 11:13:37,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:13:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 460 transitions. [2020-10-13 11:13:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:13:37,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:37,075 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:37,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:13:37,075 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 388531404, now seen corresponding path program 3 times [2020-10-13 11:13:37,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:37,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467818696] [2020-10-13 11:13:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:38,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:39,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:41,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:41,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:41,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:42,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:42,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:13:42,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 11:13:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:13:42,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:13:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:13:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:13:42,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:42,539 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-13 11:13:42,758 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-10-13 11:13:42,966 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 40 [2020-10-13 11:13:43,161 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-13 11:13:43,752 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-10-13 11:13:43,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:43,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:43,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:43,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:43,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:43,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:43,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 11:13:43,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467818696] [2020-10-13 11:13:43,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:43,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:13:43,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415061639] [2020-10-13 11:13:43,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:13:43,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:13:43,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:13:43,838 INFO L87 Difference]: Start difference. First operand 383 states and 460 transitions. Second operand 17 states. [2020-10-13 11:13:44,711 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-13 11:13:44,919 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-13 11:13:45,488 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-13 11:13:45,747 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 11:13:46,014 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-13 11:13:46,233 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-13 11:13:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:46,510 INFO L93 Difference]: Finished difference Result 480 states and 566 transitions. [2020-10-13 11:13:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:13:46,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-13 11:13:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:46,513 INFO L225 Difference]: With dead ends: 480 [2020-10-13 11:13:46,513 INFO L226 Difference]: Without dead ends: 462 [2020-10-13 11:13:46,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:13:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-13 11:13:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 398. [2020-10-13 11:13:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-13 11:13:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 475 transitions. [2020-10-13 11:13:46,610 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 475 transitions. Word has length 61 [2020-10-13 11:13:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:46,611 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 475 transitions. [2020-10-13 11:13:46,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:13:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 475 transitions. [2020-10-13 11:13:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:13:46,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:46,612 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:46,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:13:46,613 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:46,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:46,613 INFO L82 PathProgramCache]: Analyzing trace with hash 194752400, now seen corresponding path program 4 times [2020-10-13 11:13:46,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:46,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54821448] [2020-10-13 11:13:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:46,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:47,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:51,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:51,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:13:51,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:13:51,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:13:51,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:13:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 11:13:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:13:51,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:51,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:51,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:51,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:51,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:51,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:51,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-13 11:13:51,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54821448] [2020-10-13 11:13:51,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:51,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:13:51,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560857972] [2020-10-13 11:13:51,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:13:51,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:13:51,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:13:51,873 INFO L87 Difference]: Start difference. First operand 398 states and 475 transitions. Second operand 10 states. [2020-10-13 11:13:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:52,293 INFO L93 Difference]: Finished difference Result 482 states and 568 transitions. [2020-10-13 11:13:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:13:52,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-13 11:13:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:52,296 INFO L225 Difference]: With dead ends: 482 [2020-10-13 11:13:52,296 INFO L226 Difference]: Without dead ends: 376 [2020-10-13 11:13:52,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:13:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-13 11:13:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-10-13 11:13:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 11:13:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 450 transitions. [2020-10-13 11:13:52,365 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 450 transitions. Word has length 61 [2020-10-13 11:13:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:52,366 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 450 transitions. [2020-10-13 11:13:52,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:13:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 450 transitions. [2020-10-13 11:13:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:13:52,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:52,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:52,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:13:52,367 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:52,368 INFO L82 PathProgramCache]: Analyzing trace with hash -652616971, now seen corresponding path program 3 times [2020-10-13 11:13:52,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:52,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893910226] [2020-10-13 11:13:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:52,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:52,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:53,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:53,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:53,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:55,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:56,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:57,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:13:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:57,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:13:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:57,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:13:57,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:13:57,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:13:57,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:13:57,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:13:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:13:57,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:13:57,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:13:57,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:13:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 11:13:57,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893910226] [2020-10-13 11:13:57,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:13:57,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:13:57,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831582212] [2020-10-13 11:13:57,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:13:57,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:13:57,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:13:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:13:57,672 INFO L87 Difference]: Start difference. First operand 376 states and 450 transitions. Second operand 9 states. [2020-10-13 11:13:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:13:58,404 INFO L93 Difference]: Finished difference Result 1005 states and 1202 transitions. [2020-10-13 11:13:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:13:58,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-13 11:13:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:13:58,408 INFO L225 Difference]: With dead ends: 1005 [2020-10-13 11:13:58,409 INFO L226 Difference]: Without dead ends: 754 [2020-10-13 11:13:58,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:13:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-13 11:13:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 456. [2020-10-13 11:13:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-13 11:13:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 542 transitions. [2020-10-13 11:13:58,526 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 542 transitions. Word has length 61 [2020-10-13 11:13:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:13:58,526 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 542 transitions. [2020-10-13 11:13:58,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:13:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 542 transitions. [2020-10-13 11:13:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:13:58,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:13:58,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:13:58,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:13:58,529 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:13:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:13:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1590700384, now seen corresponding path program 5 times [2020-10-13 11:13:58,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:13:58,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011331670] [2020-10-13 11:13:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:13:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:13:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:58,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:58,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:59,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:59,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:13:59,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:01,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:03,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:14:03,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:14:03,842 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-10-13 11:14:04,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:14:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:14:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:04,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:14:04,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:14:04,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:14:04,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:14:04,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:14:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:14:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:14:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:14:04,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:14:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 11:14:04,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011331670] [2020-10-13 11:14:04,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:14:04,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:14:04,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759404349] [2020-10-13 11:14:04,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:14:04,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:14:04,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:14:04,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:14:04,690 INFO L87 Difference]: Start difference. First operand 456 states and 542 transitions. Second operand 16 states. [2020-10-13 11:14:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:14:06,003 INFO L93 Difference]: Finished difference Result 566 states and 663 transitions. [2020-10-13 11:14:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:14:06,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-13 11:14:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:14:06,007 INFO L225 Difference]: With dead ends: 566 [2020-10-13 11:14:06,007 INFO L226 Difference]: Without dead ends: 561 [2020-10-13 11:14:06,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:14:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-10-13 11:14:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 492. [2020-10-13 11:14:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-13 11:14:06,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 583 transitions. [2020-10-13 11:14:06,134 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 583 transitions. Word has length 62 [2020-10-13 11:14:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:14:06,135 INFO L479 AbstractCegarLoop]: Abstraction has 492 states and 583 transitions. [2020-10-13 11:14:06,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:14:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 583 transitions. [2020-10-13 11:14:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:14:06,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:14:06,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:14:06,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:14:06,138 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:14:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:14:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1512394276, now seen corresponding path program 6 times [2020-10-13 11:14:06,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:14:06,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796175480] [2020-10-13 11:14:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:14:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:14:06,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:07,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:08,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:14:11,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:14:11,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:14:11,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:14:11,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:14:11,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:14:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:14:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:14:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 11:14:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0