/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:50:49,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:50:49,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:50:49,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:50:49,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:50:49,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:50:49,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:50:49,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:50:49,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:50:49,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:50:49,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:50:49,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:50:49,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:50:49,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:50:49,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:50:49,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:50:49,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:50:49,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:50:49,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:50:49,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:50:49,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:50:49,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:50:49,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:50:49,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:50:49,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:50:49,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:50:49,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:50:49,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:50:49,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:50:49,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:50:49,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:50:49,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:50:49,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:50:49,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:50:49,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:50:49,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:50:49,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:50:49,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:50:49,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:50:49,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:50:49,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:50:49,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:50:49,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:50:49,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:50:49,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:50:49,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:50:49,423 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:50:49,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:50:49,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:50:49,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:50:49,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:50:49,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:50:49,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:50:49,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:50:49,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:50:49,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:50:49,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:50:49,426 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:50:49,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:50:49,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:50:49,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:50:49,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:50:49,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:50:49,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:50:49,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:50:49,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:50:49,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:50:49,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:50:49,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:50:49,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:50:49,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:50:49,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:50:49,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:50:49,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:50:49,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:50:49,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:50:49,717 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:50:49,718 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2020-10-13 04:50:49,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b71e6234a/b6a52641c14f41309375c0579e1300c6/FLAG48fc80133 [2020-10-13 04:50:50,210 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:50:50,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2020-10-13 04:50:50,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b71e6234a/b6a52641c14f41309375c0579e1300c6/FLAG48fc80133 [2020-10-13 04:50:50,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b71e6234a/b6a52641c14f41309375c0579e1300c6 [2020-10-13 04:50:50,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:50:50,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:50:50,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:50,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:50:50,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:50:50,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e70c28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50, skipping insertion in model container [2020-10-13 04:50:50,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:50:50,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:50:50,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:50,812 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:50:50,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:50,858 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:50:50,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50 WrapperNode [2020-10-13 04:50:50,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:50,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:50:50,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:50:50,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:50:50,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... [2020-10-13 04:50:50,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:50:50,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:50:50,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:50:50,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:50:50,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:50:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:50:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:50:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:50:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:50:51,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:50:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:50:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:50:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:50:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:50:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:50:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:50:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:50:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:50:51,263 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:50:51,264 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 04:50:51,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:51 BoogieIcfgContainer [2020-10-13 04:50:51,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:50:51,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:50:51,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:50:51,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:50:51,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:50:50" (1/3) ... [2020-10-13 04:50:51,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff3bd07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:51, skipping insertion in model container [2020-10-13 04:50:51,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:50" (2/3) ... [2020-10-13 04:50:51,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff3bd07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:51, skipping insertion in model container [2020-10-13 04:50:51,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:51" (3/3) ... [2020-10-13 04:50:51,277 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2020-10-13 04:50:51,289 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:50:51,298 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:50:51,312 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:50:51,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:50:51,337 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:50:51,338 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:50:51,338 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:50:51,338 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:50:51,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:50:51,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:50:51,339 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:50:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 04:50:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:50:51,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:51,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:51,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614638, now seen corresponding path program 1 times [2020-10-13 04:50:51,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:51,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74301826] [2020-10-13 04:50:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:51,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:51,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:51,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:51,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:50:51,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:51,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-13 04:50:51,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:50:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:50:52,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:52,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:52,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:52,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:52,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:50:52,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:52,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:52,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74301826] [2020-10-13 04:50:52,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:52,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:50:52,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360483542] [2020-10-13 04:50:52,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:50:52,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:50:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:50:52,068 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 04:50:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:52,197 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2020-10-13 04:50:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:50:52,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 04:50:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:52,209 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:50:52,209 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:50:52,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:50:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:50:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 04:50:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:50:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 04:50:52,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-10-13 04:50:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:52,269 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 04:50:52,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:50:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 04:50:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:50:52,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:52,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:52,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:50:52,275 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash -395002610, now seen corresponding path program 1 times [2020-10-13 04:50:52,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:52,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611211713] [2020-10-13 04:50:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:52,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:52,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:50:52,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:52,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-13 04:50:52,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:50:52,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:52,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:50:52,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:52,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:52,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:52,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:52,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:52,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:52,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:52,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:52,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611211713] [2020-10-13 04:50:52,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:52,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:50:52,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061873583] [2020-10-13 04:50:52,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:50:52,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:52,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:50:52,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:50:52,674 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-13 04:50:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:52,772 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-13 04:50:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:50:52,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 04:50:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:52,774 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:50:52,774 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:50:52,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:50:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:50:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:50:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:50:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 04:50:52,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-13 04:50:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:52,784 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 04:50:52,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:50:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 04:50:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:50:52,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:52,786 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, 1] [2020-10-13 04:50:52,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:50:52,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash 47445068, now seen corresponding path program 1 times [2020-10-13 04:50:52,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:52,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309392604] [2020-10-13 04:50:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:54,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:50:54,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:54,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1256 [2020-10-13 04:50:54,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:54,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:50:54,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:54,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:50:54,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:54,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:54,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:54,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:54,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 04:50:54,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309392604] [2020-10-13 04:50:54,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:54,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:50:54,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485675777] [2020-10-13 04:50:54,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:50:54,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:50:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:50:54,098 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-13 04:50:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:54,181 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-13 04:50:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:50:54,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 04:50:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:54,183 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:50:54,183 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:50:54,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:50:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:50:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:50:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:50:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:50:54,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-10-13 04:50:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:54,201 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:50:54,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:50:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:50:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:50:54,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:54,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:54,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:50:54,203 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1810840398, now seen corresponding path program 2 times [2020-10-13 04:50:54,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:54,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703401202] [2020-10-13 04:50:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:54,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:58,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:58,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:50:58,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:58,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3994 [2020-10-13 04:50:58,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:50:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:50:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:50:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:58,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:58,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:58,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:58,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:58,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:58,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:58,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:58,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:58,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:58,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:58,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:50:58,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703401202] [2020-10-13 04:50:58,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:58,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:50:58,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134573783] [2020-10-13 04:50:58,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:50:58,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:50:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:58,260 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-13 04:50:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:58,356 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-10-13 04:50:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:50:58,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:50:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:58,357 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:50:58,357 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 04:50:58,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 04:50:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 04:50:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:50:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-13 04:50:58,365 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2020-10-13 04:50:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:58,366 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-13 04:50:58,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:50:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-13 04:50:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:50:58,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:58,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:58,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:50:58,368 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1527698548, now seen corresponding path program 3 times [2020-10-13 04:50:58,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:58,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536572665] [2020-10-13 04:50:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:58,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:58,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:03,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:51:03,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:03,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:51:03,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:03,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:51:03,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 04:51:03,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:51:03,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:03,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:03,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:03,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:51:03,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:03,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:03,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:03,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:51:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 04:51:03,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536572665] [2020-10-13 04:51:03,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:03,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:51:03,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328106565] [2020-10-13 04:51:03,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:51:03,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:03,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:51:03,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:51:03,447 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2020-10-13 04:51:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:03,577 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 04:51:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:51:03,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 04:51:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:03,579 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:51:03,579 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:51:03,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:51:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:51:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:51:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:51:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 04:51:03,592 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2020-10-13 04:51:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:03,593 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 04:51:03,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:51:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 04:51:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:51:03,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:03,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:03,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:51:03,595 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1451349618, now seen corresponding path program 4 times [2020-10-13 04:51:03,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:03,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303697057] [2020-10-13 04:51:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:03,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:08,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:08,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:51:08,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:08,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:51:08,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:51:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:51:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:51:08,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:08,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:08,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:08,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:08,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:08,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:51:08,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:08,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:08,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:08,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:08,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:51:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 04:51:08,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303697057] [2020-10-13 04:51:08,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:08,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:51:08,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325499021] [2020-10-13 04:51:08,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:51:08,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:08,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:51:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:51:08,692 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-10-13 04:51:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:08,820 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-13 04:51:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:51:08,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 04:51:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:08,823 INFO L225 Difference]: With dead ends: 73 [2020-10-13 04:51:08,823 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:51:08,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:51:08,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:51:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 04:51:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:51:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 04:51:08,835 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2020-10-13 04:51:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:08,836 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 04:51:08,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:51:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 04:51:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:51:08,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:08,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:08,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:51:08,838 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2058629836, now seen corresponding path program 5 times [2020-10-13 04:51:08,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:08,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525057420] [2020-10-13 04:51:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:08,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:13,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:13,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:51:13,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:13,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:51:13,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:13,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:51:13,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 04:51:13,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:51:13,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:13,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:13,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:13,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:13,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:13,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:13,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:51:13,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525057420] [2020-10-13 04:51:13,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:13,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:51:13,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748186265] [2020-10-13 04:51:13,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:51:13,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:51:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:51:13,932 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-10-13 04:51:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:14,037 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-13 04:51:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:51:14,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 04:51:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:14,039 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:51:14,039 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:51:14,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:51:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:51:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 04:51:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:51:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 04:51:14,046 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2020-10-13 04:51:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:14,046 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 04:51:14,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:51:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 04:51:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:51:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:14,048 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:14,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:51:14,048 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:14,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1129940942, now seen corresponding path program 6 times [2020-10-13 04:51:14,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:14,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113781468] [2020-10-13 04:51:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:14,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:51:19,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:19,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:19,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:19,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:19,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:19,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:51:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 04:51:19,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113781468] [2020-10-13 04:51:19,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:19,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:51:19,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491587900] [2020-10-13 04:51:19,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:51:19,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:51:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:51:19,147 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-13 04:51:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:19,270 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-13 04:51:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:51:19,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 04:51:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:19,271 INFO L225 Difference]: With dead ends: 87 [2020-10-13 04:51:19,272 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:51:19,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:51:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:51:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 04:51:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:51:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-13 04:51:19,280 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2020-10-13 04:51:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:19,281 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-13 04:51:19,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:51:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-13 04:51:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:51:19,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:19,282 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:19,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:51:19,282 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:19,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2092627444, now seen corresponding path program 7 times [2020-10-13 04:51:19,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:19,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491453164] [2020-10-13 04:51:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:19,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:24,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:51:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:24,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:24,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:24,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:24,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:24,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:24,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:24,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:24,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 04:51:24,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491453164] [2020-10-13 04:51:24,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:24,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:51:24,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763417576] [2020-10-13 04:51:24,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:51:24,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:51:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:51:24,382 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2020-10-13 04:51:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:24,510 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-13 04:51:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:51:24,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 04:51:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:24,511 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:51:24,512 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:51:24,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:51:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:51:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 04:51:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:51:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-13 04:51:24,519 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-10-13 04:51:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:24,519 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-13 04:51:24,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:51:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-13 04:51:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:51:24,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:24,520 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:24,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:51:24,521 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2092520974, now seen corresponding path program 8 times [2020-10-13 04:51:24,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:24,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178453464] [2020-10-13 04:51:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:24,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:24,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:25,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:29,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:29,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:51:29,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:29,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:51:29,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:29,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:51:29,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:29,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:51:29,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:29,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:29,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:29,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:29,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:29,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:29,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:29,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 04:51:29,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178453464] [2020-10-13 04:51:29,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:29,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:51:29,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271652646] [2020-10-13 04:51:29,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:51:29,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:51:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:51:29,628 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 12 states. [2020-10-13 04:51:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:29,796 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-10-13 04:51:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:51:29,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 04:51:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:29,797 INFO L225 Difference]: With dead ends: 101 [2020-10-13 04:51:29,797 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:51:29,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:51:29,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:51:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 04:51:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:51:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 04:51:29,813 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2020-10-13 04:51:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:29,814 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 04:51:29,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:51:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 04:51:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:51:29,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:29,815 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:29,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:51:29,815 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1825288524, now seen corresponding path program 9 times [2020-10-13 04:51:29,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:29,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326945151] [2020-10-13 04:51:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:29,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:29,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:34,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:51:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:51:34,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:34,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:34,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:34,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:34,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:34,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-13 04:51:34,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326945151] [2020-10-13 04:51:34,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:34,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:51:34,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376477048] [2020-10-13 04:51:34,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:51:34,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:51:34,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:51:34,936 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 13 states. [2020-10-13 04:51:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:35,076 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-13 04:51:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:51:35,077 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-13 04:51:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:35,077 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:51:35,078 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:51:35,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:51:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:51:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 04:51:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:51:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 04:51:35,089 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2020-10-13 04:51:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:35,089 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 04:51:35,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:51:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 04:51:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:51:35,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:35,093 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:35,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:51:35,093 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1177185202, now seen corresponding path program 10 times [2020-10-13 04:51:35,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:35,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407296221] [2020-10-13 04:51:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:35,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:35,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:35,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:40,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:51:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:40,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:40,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:40,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:40,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:40,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:40,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:40,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:40,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-13 04:51:40,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407296221] [2020-10-13 04:51:40,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:40,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:51:40,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603063568] [2020-10-13 04:51:40,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:51:40,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:51:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:51:40,230 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 14 states. [2020-10-13 04:51:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:40,399 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-13 04:51:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:51:40,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 04:51:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:40,400 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:51:40,400 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 04:51:40,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:51:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 04:51:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 04:51:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:51:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-13 04:51:40,407 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2020-10-13 04:51:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:40,408 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-13 04:51:40,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:51:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-13 04:51:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:51:40,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:40,409 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:40,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:51:40,409 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash 342894732, now seen corresponding path program 11 times [2020-10-13 04:51:40,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:40,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495510760] [2020-10-13 04:51:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:40,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:40,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:40,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:41,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:45,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:51:45,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:45,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:45,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:45,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-13 04:51:45,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495510760] [2020-10-13 04:51:45,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:45,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:51:45,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660879651] [2020-10-13 04:51:45,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:51:45,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:51:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:51:45,550 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-10-13 04:51:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:45,721 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2020-10-13 04:51:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:51:45,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-13 04:51:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:45,722 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:51:45,722 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:51:45,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:51:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:51:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 04:51:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:51:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 04:51:45,731 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2020-10-13 04:51:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:45,732 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 04:51:45,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:51:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 04:51:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:51:45,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:45,733 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:45,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:51:45,733 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1686898, now seen corresponding path program 12 times [2020-10-13 04:51:45,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:45,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137848142] [2020-10-13 04:51:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:45,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:45,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:50,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:50,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:51:50,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:50,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:51:50,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:50,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:51:50,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:51:50,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:51:50,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:50,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:50,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:50,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:50,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:50,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-13 04:51:50,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137848142] [2020-10-13 04:51:50,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:50,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:51:50,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634340276] [2020-10-13 04:51:50,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:51:50,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:50,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:51:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:51:50,892 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 16 states. [2020-10-13 04:51:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:51,092 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2020-10-13 04:51:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:51:51,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-13 04:51:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:51,094 INFO L225 Difference]: With dead ends: 129 [2020-10-13 04:51:51,094 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:51:51,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:51:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:51:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 04:51:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:51:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-13 04:51:51,101 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2020-10-13 04:51:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:51,101 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-13 04:51:51,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:51:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-13 04:51:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:51:51,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:51,103 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:51,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:51:51,103 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:51,103 INFO L82 PathProgramCache]: Analyzing trace with hash 106590156, now seen corresponding path program 13 times [2020-10-13 04:51:51,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:51,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956276786] [2020-10-13 04:51:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:51,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:52,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:56,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:56,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:51:56,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:56,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:56,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:56,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:56,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:56,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:51:56,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:56,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:56,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:51:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-10-13 04:51:56,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956276786] [2020-10-13 04:51:56,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:56,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:51:56,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468612869] [2020-10-13 04:51:56,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:51:56,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:51:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:51:56,327 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 17 states. [2020-10-13 04:51:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:56,554 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2020-10-13 04:51:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:51:56,555 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-13 04:51:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:56,559 INFO L225 Difference]: With dead ends: 136 [2020-10-13 04:51:56,559 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:51:56,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:51:56,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:51:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 04:51:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:51:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-13 04:51:56,582 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2020-10-13 04:51:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:56,582 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-13 04:51:56,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:51:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-13 04:51:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:51:56,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:56,584 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:56,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:51:56,585 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1965252814, now seen corresponding path program 14 times [2020-10-13 04:51:56,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:56,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334553705] [2020-10-13 04:51:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:59,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:01,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:01,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:52:01,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:52:01,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:52:01,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:52:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:52:01,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:01,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:01,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:01,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:01,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:01,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:01,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:01,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:01,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:01,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:52:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-13 04:52:01,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334553705] [2020-10-13 04:52:01,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:01,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:52:01,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504917198] [2020-10-13 04:52:01,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:52:01,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:52:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:52:01,822 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 18 states. [2020-10-13 04:52:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:02,047 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-10-13 04:52:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:52:02,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-13 04:52:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:02,049 INFO L225 Difference]: With dead ends: 143 [2020-10-13 04:52:02,049 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:52:02,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:52:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:52:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-13 04:52:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:52:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-13 04:52:02,071 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2020-10-13 04:52:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:02,072 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-13 04:52:02,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:52:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-13 04:52:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 04:52:02,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:02,075 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:02,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:52:02,075 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash -38631668, now seen corresponding path program 15 times [2020-10-13 04:52:02,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:02,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501527800] [2020-10-13 04:52:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:02,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:02,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:02,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:07,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:52:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:07,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:07,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:07,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:07,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:07,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:52:07,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:07,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:52:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-13 04:52:07,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501527800] [2020-10-13 04:52:07,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:07,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:52:07,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4322744] [2020-10-13 04:52:07,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:52:07,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:07,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:52:07,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:52:07,309 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 19 states. [2020-10-13 04:52:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:07,525 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2020-10-13 04:52:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:52:07,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-13 04:52:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:07,527 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:52:07,527 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:52:07,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:52:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:52:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 04:52:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:52:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-13 04:52:07,539 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-10-13 04:52:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:07,540 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-13 04:52:07,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:52:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-13 04:52:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:52:07,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:07,541 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:07,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:52:07,541 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash -523964658, now seen corresponding path program 16 times [2020-10-13 04:52:07,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:07,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346736454] [2020-10-13 04:52:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:12,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:12,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:52:12,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:12,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:52:12,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:52:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:52:12,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:12,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:12,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:12,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:12,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:12,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-13 04:52:12,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346736454] [2020-10-13 04:52:12,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:12,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:52:12,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076728628] [2020-10-13 04:52:12,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:52:12,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:12,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:52:12,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:52:12,771 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 20 states. [2020-10-13 04:52:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:12,971 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2020-10-13 04:52:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:52:12,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-13 04:52:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:12,973 INFO L225 Difference]: With dead ends: 157 [2020-10-13 04:52:12,973 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 04:52:12,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:52:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 04:52:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-13 04:52:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:52:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-13 04:52:12,988 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-13 04:52:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:12,989 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-13 04:52:12,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:52:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-13 04:52:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:52:12,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:12,992 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:12,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:52:12,993 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1688235596, now seen corresponding path program 17 times [2020-10-13 04:52:12,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:12,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583292615] [2020-10-13 04:52:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:18,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:52:18,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:18,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:18,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:18,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:18,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:18,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:18,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:18,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:18,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:18,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-10-13 04:52:18,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583292615] [2020-10-13 04:52:18,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:18,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:52:18,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465447419] [2020-10-13 04:52:18,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:52:18,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:52:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:52:18,229 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 21 states. [2020-10-13 04:52:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:18,455 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2020-10-13 04:52:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:52:18,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-13 04:52:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:18,457 INFO L225 Difference]: With dead ends: 164 [2020-10-13 04:52:18,457 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:52:18,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:52:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:52:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 04:52:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:52:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-13 04:52:18,464 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 87 [2020-10-13 04:52:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:18,464 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-13 04:52:18,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:52:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-13 04:52:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:52:18,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:18,469 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:18,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:52:18,469 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 721612110, now seen corresponding path program 18 times [2020-10-13 04:52:18,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:18,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042700763] [2020-10-13 04:52:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:18,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:18,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:23,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:23,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:52:23,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:52:23,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:52:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:52:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:52:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:23,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:23,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:23,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:23,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:23,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:23,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:23,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-10-13 04:52:23,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042700763] [2020-10-13 04:52:23,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:23,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:52:23,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958343074] [2020-10-13 04:52:23,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:52:23,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:52:23,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:52:23,745 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 22 states. [2020-10-13 04:52:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:23,968 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-10-13 04:52:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:52:23,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2020-10-13 04:52:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:23,970 INFO L225 Difference]: With dead ends: 171 [2020-10-13 04:52:23,970 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:52:23,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:52:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:52:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 04:52:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:52:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-13 04:52:23,977 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-10-13 04:52:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:23,977 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-13 04:52:23,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:52:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-13 04:52:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:52:23,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:23,978 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:23,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:52:23,978 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash -733207156, now seen corresponding path program 19 times [2020-10-13 04:52:23,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:23,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106274753] [2020-10-13 04:52:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:23,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:28,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:52:28,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:29,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:29,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:29,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:29,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:29,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-13 04:52:29,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106274753] [2020-10-13 04:52:29,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:29,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:52:29,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671111175] [2020-10-13 04:52:29,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:52:29,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:52:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:52:29,260 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 23 states. [2020-10-13 04:52:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:29,517 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2020-10-13 04:52:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:52:29,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-13 04:52:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:29,518 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:52:29,518 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:52:29,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:52:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:52:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-13 04:52:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:52:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 04:52:29,525 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2020-10-13 04:52:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:29,526 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 04:52:29,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:52:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 04:52:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:52:29,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:29,527 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:29,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:52:29,527 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash -585802866, now seen corresponding path program 20 times [2020-10-13 04:52:29,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:29,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752526116] [2020-10-13 04:52:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:34,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:52:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:52:34,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:34,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:34,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:34,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:34,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-13 04:52:34,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752526116] [2020-10-13 04:52:34,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:34,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:52:34,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436670795] [2020-10-13 04:52:34,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:52:34,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:52:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:52:34,825 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 24 states. [2020-10-13 04:52:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:35,046 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-10-13 04:52:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:52:35,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-10-13 04:52:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:35,050 INFO L225 Difference]: With dead ends: 185 [2020-10-13 04:52:35,050 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 04:52:35,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:52:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 04:52:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-13 04:52:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:52:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-10-13 04:52:35,057 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2020-10-13 04:52:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:35,057 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-10-13 04:52:35,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:52:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-10-13 04:52:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:52:35,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:35,059 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:35,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:52:35,059 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1797411636, now seen corresponding path program 21 times [2020-10-13 04:52:35,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:35,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314832439] [2020-10-13 04:52:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:35,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:35,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:35,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:52:40,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 04:52:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:52:40,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:40,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:40,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:40,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:40,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:40,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:40,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-10-13 04:52:40,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314832439] [2020-10-13 04:52:40,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:40,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:52:40,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729731605] [2020-10-13 04:52:40,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:52:40,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:52:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:52:40,392 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 25 states. [2020-10-13 04:52:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:40,625 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-10-13 04:52:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:52:40,625 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-13 04:52:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:40,626 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:52:40,626 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:52:40,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:52:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:52:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 04:52:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:52:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-13 04:52:40,635 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2020-10-13 04:52:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:40,635 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-13 04:52:40,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:52:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-13 04:52:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:52:40,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:40,637 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:40,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:52:40,637 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:40,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1590412850, now seen corresponding path program 22 times [2020-10-13 04:52:40,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:40,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170934544] [2020-10-13 04:52:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:40,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:52:45,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:52:45,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:52:45,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:45,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:45,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:45,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:45,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2020-10-13 04:52:45,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170934544] [2020-10-13 04:52:45,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:45,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:52:45,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702444451] [2020-10-13 04:52:45,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:52:45,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:45,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:52:45,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:52:45,992 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 26 states. [2020-10-13 04:52:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:46,200 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2020-10-13 04:52:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:52:46,201 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-13 04:52:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:46,202 INFO L225 Difference]: With dead ends: 199 [2020-10-13 04:52:46,202 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:52:46,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:52:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:52:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-13 04:52:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:52:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-10-13 04:52:46,212 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 107 [2020-10-13 04:52:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:46,212 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-10-13 04:52:46,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:52:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-10-13 04:52:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:52:46,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:46,214 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:46,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:52:46,216 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash 494732300, now seen corresponding path program 23 times [2020-10-13 04:52:46,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:46,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187210736] [2020-10-13 04:52:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:46,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:46,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:46,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:51,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:51,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:52:51,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:51,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:52:51,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:51,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:52:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:52:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:52:51,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:51,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:51,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:51,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:51,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:51,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:51,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:52:51,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:51,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2020-10-13 04:52:51,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187210736] [2020-10-13 04:52:51,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:51,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:52:51,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379301737] [2020-10-13 04:52:51,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:52:51,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:52:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:52:51,625 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 27 states. [2020-10-13 04:52:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:51,883 INFO L93 Difference]: Finished difference Result 206 states and 217 transitions. [2020-10-13 04:52:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:52:51,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 111 [2020-10-13 04:52:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:51,884 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:52:51,885 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:52:51,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:52:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:52:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-13 04:52:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:52:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-13 04:52:51,891 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-10-13 04:52:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:51,891 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-13 04:52:51,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:52:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-13 04:52:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:52:51,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:51,892 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:51,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:52:51,893 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1030256626, now seen corresponding path program 24 times [2020-10-13 04:52:51,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:51,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551228889] [2020-10-13 04:52:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:51,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:52,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:56,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:56,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:52:56,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:57,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:57,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:57,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:57,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 04:52:57,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551228889] [2020-10-13 04:52:57,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:57,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:52:57,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482241870] [2020-10-13 04:52:57,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:52:57,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:52:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:52:57,290 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 28 states. [2020-10-13 04:52:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:57,611 INFO L93 Difference]: Finished difference Result 213 states and 224 transitions. [2020-10-13 04:52:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:52:57,612 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 115 [2020-10-13 04:52:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:57,613 INFO L225 Difference]: With dead ends: 213 [2020-10-13 04:52:57,613 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:52:57,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:52:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:52:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 04:52:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:52:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-13 04:52:57,625 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2020-10-13 04:52:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:57,626 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-13 04:52:57,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:52:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-13 04:52:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:52:57,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:57,627 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:57,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:52:57,627 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1806554292, now seen corresponding path program 25 times [2020-10-13 04:52:57,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:57,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507777510] [2020-10-13 04:52:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:57,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:02,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:53:02,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:02,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:53:02,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:53:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:53:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:53:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:03,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:03,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:03,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:03,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:03,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:03,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-13 04:53:03,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507777510] [2020-10-13 04:53:03,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:03,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:53:03,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795714884] [2020-10-13 04:53:03,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:53:03,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:53:03,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:53:03,074 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 29 states. [2020-10-13 04:53:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:03,393 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2020-10-13 04:53:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:53:03,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-10-13 04:53:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:03,395 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:53:03,395 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:53:03,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:53:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:53:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-13 04:53:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:53:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-13 04:53:03,403 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-10-13 04:53:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:03,404 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-13 04:53:03,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:53:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-13 04:53:03,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:53:03,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:03,405 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:03,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:53:03,405 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1384692146, now seen corresponding path program 26 times [2020-10-13 04:53:03,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:03,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510232205] [2020-10-13 04:53:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:08,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:53:08,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:08,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:08,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:08,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:08,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2020-10-13 04:53:08,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510232205] [2020-10-13 04:53:08,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:08,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:53:08,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981162826] [2020-10-13 04:53:08,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:53:08,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:53:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:53:08,871 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 30 states. [2020-10-13 04:53:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:09,197 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2020-10-13 04:53:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:53:09,198 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2020-10-13 04:53:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:09,199 INFO L225 Difference]: With dead ends: 227 [2020-10-13 04:53:09,199 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 04:53:09,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:53:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 04:53:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-13 04:53:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:53:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-13 04:53:09,206 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 123 [2020-10-13 04:53:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:09,206 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-13 04:53:09,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:53:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-13 04:53:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 04:53:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:09,208 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:09,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:53:09,208 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1317347980, now seen corresponding path program 27 times [2020-10-13 04:53:09,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:09,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454220140] [2020-10-13 04:53:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:09,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:14,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 04:53:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:53:14,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:14,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:14,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:14,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:14,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:14,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:14,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:14,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:14,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:14,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:14,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-10-13 04:53:14,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454220140] [2020-10-13 04:53:14,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:14,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:53:14,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44387924] [2020-10-13 04:53:14,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:53:14,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:53:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:53:14,715 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 31 states. [2020-10-13 04:53:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:15,052 INFO L93 Difference]: Finished difference Result 234 states and 245 transitions. [2020-10-13 04:53:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:53:15,052 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 127 [2020-10-13 04:53:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:15,054 INFO L225 Difference]: With dead ends: 234 [2020-10-13 04:53:15,054 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:53:15,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:53:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:53:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 04:53:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:53:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-13 04:53:15,061 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 127 [2020-10-13 04:53:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:15,061 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-13 04:53:15,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:53:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-13 04:53:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:53:15,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:15,062 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:15,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:53:15,063 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:15,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1863021710, now seen corresponding path program 28 times [2020-10-13 04:53:15,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:15,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286289399] [2020-10-13 04:53:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:15,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:15,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:20,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:53:20,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:20,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:20,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:20,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:20,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:20,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:20,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:20,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:20,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:20,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:20,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:20,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2020-10-13 04:53:20,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286289399] [2020-10-13 04:53:20,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:20,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:53:20,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51810536] [2020-10-13 04:53:20,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:53:20,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:20,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:53:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:53:20,743 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 32 states. [2020-10-13 04:53:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:21,164 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2020-10-13 04:53:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:53:21,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-10-13 04:53:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:21,166 INFO L225 Difference]: With dead ends: 241 [2020-10-13 04:53:21,167 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:53:21,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:53:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:53:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-13 04:53:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:53:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2020-10-13 04:53:21,176 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 131 [2020-10-13 04:53:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:21,176 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2020-10-13 04:53:21,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:53:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2020-10-13 04:53:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 04:53:21,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:21,178 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:21,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:53:21,180 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1346234828, now seen corresponding path program 29 times [2020-10-13 04:53:21,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:21,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035391473] [2020-10-13 04:53:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:21,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:21,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:26,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 04:53:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:53:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:26,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:26,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:26,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2020-10-13 04:53:26,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035391473] [2020-10-13 04:53:26,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:26,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:53:26,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457201330] [2020-10-13 04:53:26,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:53:26,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:26,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:53:26,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:53:26,750 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 33 states. [2020-10-13 04:53:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:27,054 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2020-10-13 04:53:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:53:27,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-13 04:53:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:27,056 INFO L225 Difference]: With dead ends: 248 [2020-10-13 04:53:27,056 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:53:27,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:53:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:53:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-13 04:53:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:53:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-13 04:53:27,063 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2020-10-13 04:53:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:27,063 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-13 04:53:27,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:53:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-13 04:53:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 04:53:27,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:27,064 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:27,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:53:27,065 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash 898372302, now seen corresponding path program 30 times [2020-10-13 04:53:27,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:27,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783374487] [2020-10-13 04:53:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:27,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:32,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:32,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 04:53:32,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:32,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:53:32,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:32,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:53:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:53:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:53:32,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:32,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:32,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:32,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:32,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:32,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:32,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:53:32,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:32,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:32,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:32,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:32,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-10-13 04:53:32,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783374487] [2020-10-13 04:53:32,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:32,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:53:32,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699137797] [2020-10-13 04:53:32,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:53:32,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:53:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:53:32,673 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 34 states. [2020-10-13 04:53:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:33,017 INFO L93 Difference]: Finished difference Result 255 states and 266 transitions. [2020-10-13 04:53:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:53:33,018 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 139 [2020-10-13 04:53:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:33,019 INFO L225 Difference]: With dead ends: 255 [2020-10-13 04:53:33,019 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:53:33,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:53:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:53:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 04:53:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:53:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2020-10-13 04:53:33,026 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 139 [2020-10-13 04:53:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:33,026 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2020-10-13 04:53:33,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:53:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2020-10-13 04:53:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 04:53:33,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:33,027 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:33,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:53:33,028 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash -861634292, now seen corresponding path program 31 times [2020-10-13 04:53:33,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:33,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686090020] [2020-10-13 04:53:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:33,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:38,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:38,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 04:53:38,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:38,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:53:38,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:53:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 04:53:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:53:38,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:38,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:38,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:38,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:38,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:38,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:38,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:38,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:38,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:38,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:38,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:38,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2020-10-13 04:53:38,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686090020] [2020-10-13 04:53:38,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:38,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:53:38,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455479753] [2020-10-13 04:53:38,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:53:38,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:53:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:53:38,633 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 35 states. [2020-10-13 04:53:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:38,897 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2020-10-13 04:53:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:53:38,897 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2020-10-13 04:53:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:38,898 INFO L225 Difference]: With dead ends: 262 [2020-10-13 04:53:38,898 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 04:53:38,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:53:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 04:53:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-13 04:53:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:53:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-13 04:53:38,908 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 143 [2020-10-13 04:53:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:38,908 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-13 04:53:38,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:53:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-13 04:53:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:53:38,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:38,909 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:38,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:53:38,909 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:38,911 INFO L82 PathProgramCache]: Analyzing trace with hash -802086642, now seen corresponding path program 32 times [2020-10-13 04:53:38,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:38,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763485159] [2020-10-13 04:53:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:38,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:39,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:39,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:43,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:43,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:53:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:44,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:44,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:44,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:44,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:44,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:44,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:44,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2020-10-13 04:53:44,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763485159] [2020-10-13 04:53:44,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:44,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:53:44,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464298620] [2020-10-13 04:53:44,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:53:44,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:53:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:53:44,598 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 36 states. [2020-10-13 04:53:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:44,911 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2020-10-13 04:53:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:53:44,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 147 [2020-10-13 04:53:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:44,914 INFO L225 Difference]: With dead ends: 269 [2020-10-13 04:53:44,914 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 04:53:44,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:53:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 04:53:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-13 04:53:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:53:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-10-13 04:53:44,926 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2020-10-13 04:53:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:44,926 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-10-13 04:53:44,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:53:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-10-13 04:53:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 04:53:44,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:44,928 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:44,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:53:44,928 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1511987124, now seen corresponding path program 33 times [2020-10-13 04:53:44,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:44,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059466212] [2020-10-13 04:53:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:45,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:49,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:49,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 04:53:49,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:49,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:53:49,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:49,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:53:49,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:49,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:53:49,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:50,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:50,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:50,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:50,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:50,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:50,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-10-13 04:53:50,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059466212] [2020-10-13 04:53:50,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:50,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:53:50,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528677433] [2020-10-13 04:53:50,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:53:50,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:53:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:53:50,602 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 37 states. [2020-10-13 04:53:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:50,961 INFO L93 Difference]: Finished difference Result 276 states and 287 transitions. [2020-10-13 04:53:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:53:50,961 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 151 [2020-10-13 04:53:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:50,963 INFO L225 Difference]: With dead ends: 276 [2020-10-13 04:53:50,963 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:53:50,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:53:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:53:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 04:53:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:53:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2020-10-13 04:53:50,973 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 151 [2020-10-13 04:53:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:50,974 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2020-10-13 04:53:50,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:53:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2020-10-13 04:53:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:53:50,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:50,975 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:50,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:53:50,975 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash 791846734, now seen corresponding path program 34 times [2020-10-13 04:53:50,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:50,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307299868] [2020-10-13 04:53:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:51,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:53:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:53:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:53:56,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:53:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:53:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:56,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:56,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:56,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:56,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:56,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:56,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:56,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:56,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:56,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:56,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2020-10-13 04:53:56,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307299868] [2020-10-13 04:53:56,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:56,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:53:56,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714670155] [2020-10-13 04:53:56,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:53:56,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:53:56,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:53:56,683 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 38 states. [2020-10-13 04:53:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:57,005 INFO L93 Difference]: Finished difference Result 283 states and 294 transitions. [2020-10-13 04:53:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:53:57,006 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 155 [2020-10-13 04:53:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:57,007 INFO L225 Difference]: With dead ends: 283 [2020-10-13 04:53:57,007 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 04:53:57,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:53:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 04:53:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-13 04:53:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 04:53:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-13 04:53:57,016 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2020-10-13 04:53:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:57,017 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-13 04:53:57,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:53:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-13 04:53:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 04:53:57,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:57,019 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:57,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:53:57,019 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash -316989556, now seen corresponding path program 35 times [2020-10-13 04:53:57,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:57,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311235236] [2020-10-13 04:53:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:57,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:57,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:54:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 04:54:02,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:54:02,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:02,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:02,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:02,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:02,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:02,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:02,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:02,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-13 04:54:02,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311235236] [2020-10-13 04:54:02,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:02,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:54:02,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365046098] [2020-10-13 04:54:02,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:54:02,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:54:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:54:02,771 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 39 states. [2020-10-13 04:54:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:03,116 INFO L93 Difference]: Finished difference Result 290 states and 301 transitions. [2020-10-13 04:54:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:54:03,116 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 159 [2020-10-13 04:54:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:03,117 INFO L225 Difference]: With dead ends: 290 [2020-10-13 04:54:03,117 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 04:54:03,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:54:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 04:54:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-13 04:54:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:54:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-13 04:54:03,126 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 159 [2020-10-13 04:54:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:03,127 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-13 04:54:03,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:54:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-13 04:54:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 04:54:03,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:03,128 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:03,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:54:03,129 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash -473395826, now seen corresponding path program 36 times [2020-10-13 04:54:03,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:03,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627441839] [2020-10-13 04:54:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:03,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:03,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:08,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 04:54:08,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:08,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:54:08,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:08,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:54:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:54:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:54:08,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:08,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:08,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:08,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-10-13 04:54:08,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627441839] [2020-10-13 04:54:08,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:08,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:54:08,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467669000] [2020-10-13 04:54:08,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:54:08,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:54:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:54:08,929 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 40 states. [2020-10-13 04:54:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:09,356 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2020-10-13 04:54:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:54:09,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 163 [2020-10-13 04:54:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:09,358 INFO L225 Difference]: With dead ends: 297 [2020-10-13 04:54:09,358 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 04:54:09,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:54:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 04:54:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-13 04:54:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:54:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-13 04:54:09,365 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2020-10-13 04:54:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:09,366 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-13 04:54:09,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:54:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-13 04:54:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 04:54:09,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:09,367 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:09,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:54:09,367 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:09,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1652238028, now seen corresponding path program 37 times [2020-10-13 04:54:09,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:09,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883876819] [2020-10-13 04:54:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:14,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 04:54:14,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:14,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:54:14,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:54:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 04:54:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:54:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:15,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:15,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:15,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2020-10-13 04:54:15,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883876819] [2020-10-13 04:54:15,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:15,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:54:15,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692473408] [2020-10-13 04:54:15,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:54:15,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:54:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:54:15,222 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 41 states. [2020-10-13 04:54:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:15,619 INFO L93 Difference]: Finished difference Result 304 states and 315 transitions. [2020-10-13 04:54:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:54:15,619 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 167 [2020-10-13 04:54:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:15,621 INFO L225 Difference]: With dead ends: 304 [2020-10-13 04:54:15,621 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 04:54:15,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:54:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 04:54:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-13 04:54:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:54:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-13 04:54:15,629 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2020-10-13 04:54:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:15,629 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-13 04:54:15,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:54:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-13 04:54:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:54:15,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:15,630 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:15,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:54:15,631 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1607799858, now seen corresponding path program 38 times [2020-10-13 04:54:15,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:15,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261410812] [2020-10-13 04:54:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:20,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:54:20,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:20,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:54:20,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:20,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:54:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:54:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:54:20,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:21,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:21,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:21,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:21,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:21,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:21,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:21,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:21,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:21,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2020-10-13 04:54:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261410812] [2020-10-13 04:54:21,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:21,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:54:21,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235529592] [2020-10-13 04:54:21,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:54:21,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:54:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:54:21,517 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 42 states. [2020-10-13 04:54:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:21,925 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2020-10-13 04:54:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:54:21,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 171 [2020-10-13 04:54:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:21,927 INFO L225 Difference]: With dead ends: 311 [2020-10-13 04:54:21,928 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 04:54:21,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:54:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 04:54:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-13 04:54:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 04:54:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-10-13 04:54:21,934 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2020-10-13 04:54:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:21,935 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-10-13 04:54:21,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:54:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-10-13 04:54:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 04:54:21,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:21,936 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:21,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:54:21,936 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -181862900, now seen corresponding path program 39 times [2020-10-13 04:54:21,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:21,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063288151] [2020-10-13 04:54:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:21,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:22,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:22,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:54:26,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:27,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:27,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:27,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:27,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:27,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2020-10-13 04:54:27,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063288151] [2020-10-13 04:54:27,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:27,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:54:27,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478413850] [2020-10-13 04:54:27,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:54:27,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:54:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:54:27,829 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 43 states. [2020-10-13 04:54:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:28,303 INFO L93 Difference]: Finished difference Result 318 states and 329 transitions. [2020-10-13 04:54:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:54:28,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 175 [2020-10-13 04:54:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:28,305 INFO L225 Difference]: With dead ends: 318 [2020-10-13 04:54:28,306 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:54:28,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:54:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:54:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-13 04:54:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:54:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-13 04:54:28,319 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 175 [2020-10-13 04:54:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:28,319 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-13 04:54:28,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:54:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-13 04:54:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:54:28,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:28,321 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:28,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:54:28,321 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1215186418, now seen corresponding path program 40 times [2020-10-13 04:54:28,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:28,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864444301] [2020-10-13 04:54:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:28,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:33,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:33,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:54:33,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2020-10-13 04:54:34,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864444301] [2020-10-13 04:54:34,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:34,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:54:34,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690612590] [2020-10-13 04:54:34,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:54:34,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:34,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:54:34,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:54:34,302 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 44 states. [2020-10-13 04:54:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:34,787 INFO L93 Difference]: Finished difference Result 325 states and 336 transitions. [2020-10-13 04:54:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:54:34,787 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-10-13 04:54:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:34,789 INFO L225 Difference]: With dead ends: 325 [2020-10-13 04:54:34,789 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 04:54:34,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:54:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 04:54:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-13 04:54:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 04:54:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2020-10-13 04:54:34,796 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2020-10-13 04:54:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:34,796 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2020-10-13 04:54:34,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:54:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2020-10-13 04:54:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 04:54:34,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:34,798 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:34,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:54:34,798 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1129096524, now seen corresponding path program 41 times [2020-10-13 04:54:34,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:34,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881015935] [2020-10-13 04:54:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:39,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 04:54:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:40,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:40,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:40,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:40,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:40,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:40,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:40,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2020-10-13 04:54:40,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881015935] [2020-10-13 04:54:40,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:40,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:54:40,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079900398] [2020-10-13 04:54:40,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:54:40,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:54:40,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:54:40,765 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 45 states. [2020-10-13 04:54:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:41,263 INFO L93 Difference]: Finished difference Result 332 states and 343 transitions. [2020-10-13 04:54:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:54:41,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 183 [2020-10-13 04:54:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:41,265 INFO L225 Difference]: With dead ends: 332 [2020-10-13 04:54:41,265 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 04:54:41,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:54:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 04:54:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-13 04:54:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:54:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-13 04:54:41,273 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 183 [2020-10-13 04:54:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:41,273 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-13 04:54:41,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:54:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-13 04:54:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:54:41,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:41,275 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:41,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:54:41,275 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1640695730, now seen corresponding path program 42 times [2020-10-13 04:54:41,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:41,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746251883] [2020-10-13 04:54:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:46,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:54:46,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:54:46,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:54:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-13 04:54:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:54:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:47,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:47,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:47,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:54:47,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2020-10-13 04:54:47,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746251883] [2020-10-13 04:54:47,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:47,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:54:47,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68571899] [2020-10-13 04:54:47,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:54:47,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:47,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:54:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:54:47,306 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 46 states. [2020-10-13 04:54:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:47,787 INFO L93 Difference]: Finished difference Result 339 states and 350 transitions. [2020-10-13 04:54:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:54:47,788 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 187 [2020-10-13 04:54:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:47,789 INFO L225 Difference]: With dead ends: 339 [2020-10-13 04:54:47,789 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 04:54:47,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:54:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 04:54:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 04:54:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:54:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2020-10-13 04:54:47,796 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 187 [2020-10-13 04:54:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:47,797 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2020-10-13 04:54:47,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:54:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2020-10-13 04:54:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:54:47,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:47,798 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:47,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:54:47,798 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash 437132428, now seen corresponding path program 43 times [2020-10-13 04:54:47,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:47,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692236992] [2020-10-13 04:54:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:48,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:48,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:54:52,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:53,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:53,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2020-10-13 04:54:53,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692236992] [2020-10-13 04:54:53,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:53,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:54:53,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955040717] [2020-10-13 04:54:53,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:54:53,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:53,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:54:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:54:53,879 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 47 states. [2020-10-13 04:54:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:54,350 INFO L93 Difference]: Finished difference Result 346 states and 357 transitions. [2020-10-13 04:54:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:54:54,350 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 191 [2020-10-13 04:54:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:54,352 INFO L225 Difference]: With dead ends: 346 [2020-10-13 04:54:54,352 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 04:54:54,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:54:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 04:54:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-13 04:54:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:54:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2020-10-13 04:54:54,357 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 191 [2020-10-13 04:54:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:54,357 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2020-10-13 04:54:54,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:54:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2020-10-13 04:54:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 04:54:54,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:54,358 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:54,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:54:54,358 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1766631054, now seen corresponding path program 44 times [2020-10-13 04:54:54,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:54,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446574734] [2020-10-13 04:54:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:54,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking...