/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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:42:51,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:42:51,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:42:51,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:42:51,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:42:51,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:42:51,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:42:51,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:42:51,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:42:51,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:42:51,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:42:51,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:42:51,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:42:51,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:42:51,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:42:51,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:42:51,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:42:51,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:42:51,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:42:51,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:42:51,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:42:51,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:42:51,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:42:51,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:42:51,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:42:51,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:42:51,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:42:51,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:42:51,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:42:51,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:42:51,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:42:51,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:42:51,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:42:51,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:42:51,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:42:51,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:42:51,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:42:51,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:42:51,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:42:51,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:42:51,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:42:51,386 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 10:42:51,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:42:51,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:42:51,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:42:51,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:42:51,411 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:42:51,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:42:51,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:42:51,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:42:51,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:42:51,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:42:51,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:42:51,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:42:51,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:42:51,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:42:51,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:42:51,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:42:51,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:42:51,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:42:51,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:42:51,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:42:51,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:42:51,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:42:51,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:42:51,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:42:51,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:42:51,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:42:51,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:42:51,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:42:51,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:42:51,416 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 10:42:51,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:42:51,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:42:51,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:42:51,732 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:42:51,732 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:42:51,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-13 10:42:51,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5ca69eb/44859847892049e9aa1be1284a1c151b/FLAGdc2b21108 [2020-10-13 10:42:52,242 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:42:52,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-13 10:42:52,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5ca69eb/44859847892049e9aa1be1284a1c151b/FLAGdc2b21108 [2020-10-13 10:42:52,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5ca69eb/44859847892049e9aa1be1284a1c151b [2020-10-13 10:42:52,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:42:52,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:42:52,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:52,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:42:52,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:42:52,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fd4afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52, skipping insertion in model container [2020-10-13 10:42:52,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:42:52,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:42:52,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:52,820 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:42:52,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:52,859 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:42:52,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52 WrapperNode [2020-10-13 10:42:52,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:52,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:42:52,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:42:52,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:42:52,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:42:52,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:42:52,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:42:52,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:42:52,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (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 10:42:53,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:42:53,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:42:53,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:42:53,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:42:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:42:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:42:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:42:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:42:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:42:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:42:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:42:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:42:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:42:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:42:53,265 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:42:53,266 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:42:53,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:53 BoogieIcfgContainer [2020-10-13 10:42:53,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:42:53,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:42:53,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:42:53,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:42:53,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:42:52" (1/3) ... [2020-10-13 10:42:53,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75722ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:53, skipping insertion in model container [2020-10-13 10:42:53,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52" (2/3) ... [2020-10-13 10:42:53,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75722ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:53, skipping insertion in model container [2020-10-13 10:42:53,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:53" (3/3) ... [2020-10-13 10:42:53,281 INFO L109 eAbstractionObserver]: Analyzing ICFG array_4.i [2020-10-13 10:42:53,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:42:53,319 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:42:53,354 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:42:53,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:42:53,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:42:53,397 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:42:53,397 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:42:53,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:42:53,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:42:53,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:42:53,398 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:42:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 10:42:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:42:53,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:53,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:53,424 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1816719235, now seen corresponding path program 1 times [2020-10-13 10:42:53,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:53,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616374497] [2020-10-13 10:42:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:53,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:53,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:42:53,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:42:53,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-13 10:42:53,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:53,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:53,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:42:53,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:53,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:42:53,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:53,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:53,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:53,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:53,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:53,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:42:53,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:53,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:53,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:53,846 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 10:42:53,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616374497] [2020-10-13 10:42:53,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:53,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:53,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227745] [2020-10-13 10:42:53,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:53,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:53,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:53,880 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 10:42:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:53,960 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-13 10:42:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:53,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:42:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:53,971 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:42:53,971 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:42:53,975 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 10:42:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:42:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:42:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:42:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 10:42:54,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-13 10:42:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:54,010 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 10:42:54,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 10:42:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:42:54,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:54,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:54,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:42:54,012 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1663088498, now seen corresponding path program 1 times [2020-10-13 10:42:54,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:54,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625777585] [2020-10-13 10:42:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:42:54,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:54,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-13 10:42:54,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:54,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:54,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:42:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:54,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:54,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:54,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:54,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:54,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:54,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:54,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:54,285 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 10:42:54,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625777585] [2020-10-13 10:42:54,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:54,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:42:54,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504204189] [2020-10-13 10:42:54,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:42:54,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:42:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:54,289 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-13 10:42:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:54,343 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-13 10:42:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:42:54,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:42:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:54,346 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:42:54,347 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:42:54,348 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 10:42:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:42:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-10-13 10:42:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:42:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 10:42:54,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-10-13 10:42:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:54,356 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 10:42:54,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:42:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 10:42:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:42:54,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:54,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:54,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:42:54,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash 845539860, now seen corresponding path program 1 times [2020-10-13 10:42:54,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:54,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681870385] [2020-10-13 10:42:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:42:54,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:54,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 10:42:54,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:42:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:42:54,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:54,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:54,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:54,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:54,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:54,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:54,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681870385] [2020-10-13 10:42:54,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:54,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:42:54,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738956516] [2020-10-13 10:42:54,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:42:54,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:42:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:54,595 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-13 10:42:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:54,667 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 10:42:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:42:54,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 10:42:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:54,669 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:42:54,669 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:42:54,670 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 10:42:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:42:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2020-10-13 10:42:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:42:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 10:42:54,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-13 10:42:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:54,676 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 10:42:54,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:42:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 10:42:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:42:54,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:54,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:54,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:42:54,678 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:54,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1160313910, now seen corresponding path program 2 times [2020-10-13 10:42:54,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:54,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949414915] [2020-10-13 10:42:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:42:54,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:54,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-13 10:42:54,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:54,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:54,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:42:54,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:55,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:55,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:55,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949414915] [2020-10-13 10:42:55,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:55,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:42:55,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808998323] [2020-10-13 10:42:55,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:42:55,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:42:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:55,027 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-13 10:42:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:55,102 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-13 10:42:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:42:55,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:42:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:55,104 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:42:55,104 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:42:55,105 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 10:42:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:42:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2020-10-13 10:42:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:42:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 10:42:55,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-13 10:42:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:55,111 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 10:42:55,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:42:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 10:42:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:42:55,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:55,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:55,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:42:55,113 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1284502056, now seen corresponding path program 3 times [2020-10-13 10:42:55,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:55,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292781094] [2020-10-13 10:42:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:42:55,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 10:42:55,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:42:55,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:42:55,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:55,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:55,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:55,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:42:55,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292781094] [2020-10-13 10:42:55,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:55,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:42:55,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242866098] [2020-10-13 10:42:55,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:42:55,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:55,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:42:55,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:55,498 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-13 10:42:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:55,599 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-10-13 10:42:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:42:55,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:42:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:55,601 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:42:55,601 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:42:55,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:42:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:42:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 10:42:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:42:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 10:42:55,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-10-13 10:42:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:55,608 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 10:42:55,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:42:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 10:42:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:42:55,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:55,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:55,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:42:55,610 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2010104019, now seen corresponding path program 1 times [2020-10-13 10:42:55,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:55,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690379932] [2020-10-13 10:42:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:42:55,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:55,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-13 10:42:55,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:42:55,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:56,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:56,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:56,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:42:56,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690379932] [2020-10-13 10:42:56,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:56,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:42:56,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492643812] [2020-10-13 10:42:56,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:42:56,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:56,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:42:56,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:56,022 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-13 10:42:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:56,116 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 10:42:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:42:56,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-13 10:42:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:56,118 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:42:56,118 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:42:56,119 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 10:42:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:42:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-13 10:42:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:42:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 10:42:56,125 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-13 10:42:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:56,126 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 10:42:56,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:42:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 10:42:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:42:56,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:56,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:56,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:42:56,127 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:56,128 INFO L82 PathProgramCache]: Analyzing trace with hash 85779147, now seen corresponding path program 2 times [2020-10-13 10:42:56,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:56,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865510010] [2020-10-13 10:42:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:42:56,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:56,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-13 10:42:56,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:42:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:56,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:56,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:56,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:56,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:56,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:56,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:42:56,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865510010] [2020-10-13 10:42:56,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:56,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:42:56,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685500874] [2020-10-13 10:42:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:42:56,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:42:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:42:56,614 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-10-13 10:42:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:56,705 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 10:42:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:42:56,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 10:42:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:56,707 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:42:56,707 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:42:56,708 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 10:42:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:42:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-10-13 10:42:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:42:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 10:42:56,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-13 10:42:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:56,714 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 10:42:56,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:42:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 10:42:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:42:56,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:56,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:56,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:42:56,716 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:56,716 INFO L82 PathProgramCache]: Analyzing trace with hash -110160151, now seen corresponding path program 3 times [2020-10-13 10:42:56,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:56,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331255051] [2020-10-13 10:42:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:42:57,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:57,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-13 10:42:57,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:57,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:42:57,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:42:57,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:57,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:57,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:57,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:57,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:42:57,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331255051] [2020-10-13 10:42:57,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:57,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:42:57,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718346794] [2020-10-13 10:42:57,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:42:57,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:42:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:57,262 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-10-13 10:42:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:57,364 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-13 10:42:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:42:57,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 10:42:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:57,365 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:42:57,365 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:42:57,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:42:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 10:42:57,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:42:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 10:42:57,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-10-13 10:42:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:57,372 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 10:42:57,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:42:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 10:42:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:42:57,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:57,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:57,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:42:57,374 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash 300961916, now seen corresponding path program 4 times [2020-10-13 10:42:57,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:57,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067204418] [2020-10-13 10:42:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:42:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-13 10:42:57,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:42:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:42:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:57,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:57,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:57,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:57,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:42:57,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067204418] [2020-10-13 10:42:57,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:57,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:42:57,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581545948] [2020-10-13 10:42:57,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:42:57,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:42:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:57,897 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-10-13 10:42:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:57,995 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-13 10:42:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:42:57,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-13 10:42:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:57,996 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:42:57,997 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:42:57,997 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 10:42:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:42:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-10-13 10:42:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:42:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 10:42:58,003 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-13 10:42:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:58,003 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 10:42:58,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:42:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 10:42:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:42:58,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:58,004 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:58,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:42:58,005 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash -267387106, now seen corresponding path program 5 times [2020-10-13 10:42:58,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:58,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154595556] [2020-10-13 10:42:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:42:58,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-13 10:42:58,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:58,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:42:58,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:42:58,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:58,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:58,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:58,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:42:58,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154595556] [2020-10-13 10:42:58,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:58,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:42:58,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494136258] [2020-10-13 10:42:58,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:42:58,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:42:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:42:58,610 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-10-13 10:42:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:58,763 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-13 10:42:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:42:58,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:42:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:58,765 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:42:58,765 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:42:58,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:42:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:42:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 10:42:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:42:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 10:42:58,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-10-13 10:42:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:58,772 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 10:42:58,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:42:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 10:42:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:42:58,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:58,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:58,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:42:58,774 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2132901849, now seen corresponding path program 6 times [2020-10-13 10:42:58,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:58,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316646126] [2020-10-13 10:42:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:59,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:59,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:59,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:59,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-13 10:42:59,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:59,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:42:59,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:59,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:42:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:00,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:00,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:00,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:00,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:00,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:00,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:00,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:00,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 10:43:00,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316646126] [2020-10-13 10:43:00,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:00,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:43:00,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228501962] [2020-10-13 10:43:00,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:43:00,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:43:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:00,095 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 10 states. [2020-10-13 10:43:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:00,203 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-13 10:43:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:43:00,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 10:43:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:00,204 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:43:00,204 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:43:00,205 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 10:43:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:43:00,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2020-10-13 10:43:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:43:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 10:43:00,210 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-13 10:43:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:00,211 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 10:43:00,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:43:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 10:43:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:43:00,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:00,212 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:00,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:43:00,213 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1647532347, now seen corresponding path program 7 times [2020-10-13 10:43:00,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:00,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254396485] [2020-10-13 10:43:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:00,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:00,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:00,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:00,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:43:00,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-13 10:43:00,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:43:00,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:01,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:01,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:01,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:01,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:01,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:01,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 10:43:01,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254396485] [2020-10-13 10:43:01,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:01,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:43:01,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634732282] [2020-10-13 10:43:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:43:01,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:43:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:01,030 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-10-13 10:43:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:01,149 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-13 10:43:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:43:01,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 10:43:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:01,150 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:43:01,150 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:43:01,151 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 10:43:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:43:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-13 10:43:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:43:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 10:43:01,156 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-13 10:43:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:01,157 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 10:43:01,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:43:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 10:43:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:43:01,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:01,158 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:01,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:43:01,159 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash 936091107, now seen corresponding path program 8 times [2020-10-13 10:43:01,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:01,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229517284] [2020-10-13 10:43:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:01,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:02,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:43:02,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-13 10:43:02,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:02,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:43:02,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:43:02,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:43:02,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:02,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:02,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:02,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:02,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:02,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:43:02,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229517284] [2020-10-13 10:43:02,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:02,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:43:02,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399571108] [2020-10-13 10:43:02,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:43:02,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:02,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:43:02,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:43:02,694 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 9 states. [2020-10-13 10:43:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:02,864 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-13 10:43:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:43:02,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 10:43:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:02,867 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:43:02,867 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:43:02,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:43:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 10:43:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:43:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 10:43:02,873 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2020-10-13 10:43:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:02,873 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 10:43:02,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:43:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 10:43:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:43:02,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:02,874 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:02,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:43:02,875 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:02,875 INFO L82 PathProgramCache]: Analyzing trace with hash 594521922, now seen corresponding path program 9 times [2020-10-13 10:43:02,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:02,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826515940] [2020-10-13 10:43:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:43:04,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:04,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1958 [2020-10-13 10:43:04,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:43:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:43:04,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:04,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:04,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:04,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:04,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:04,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:04,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:04,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 10:43:04,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826515940] [2020-10-13 10:43:04,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:04,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:43:04,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003988479] [2020-10-13 10:43:04,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:43:05,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:43:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:05,001 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2020-10-13 10:43:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:05,133 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-13 10:43:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:43:05,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-13 10:43:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:05,135 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:43:05,135 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:43:05,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:43:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2020-10-13 10:43:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:43:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 10:43:05,143 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-13 10:43:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:05,144 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 10:43:05,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:43:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 10:43:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:43:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:05,147 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:05,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:43:05,148 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash -932939036, now seen corresponding path program 10 times [2020-10-13 10:43:05,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:05,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561731579] [2020-10-13 10:43:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:05,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:05,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:06,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:06,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:43:06,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:06,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1205 [2020-10-13 10:43:06,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:43:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 10:43:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:43:06,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:06,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:06,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:06,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:06,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:06,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:06,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:06,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:06,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:06,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:06,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:06,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 10:43:06,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561731579] [2020-10-13 10:43:06,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:06,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:43:06,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235091077] [2020-10-13 10:43:06,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:43:06,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:06,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:43:06,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:06,485 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 10 states. [2020-10-13 10:43:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:06,614 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-13 10:43:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:43:06,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 10:43:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:06,616 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:43:06,616 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:43:06,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:43:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 10:43:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:43:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 10:43:06,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2020-10-13 10:43:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:06,626 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 10:43:06,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:43:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 10:43:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:43:06,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:06,628 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:06,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:43:06,629 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 273557153, now seen corresponding path program 11 times [2020-10-13 10:43:06,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:06,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253040084] [2020-10-13 10:43:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:06,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:06,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:07,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:07,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:43:07,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:07,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-13 10:43:07,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:43:07,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:07,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:07,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:07,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:07,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:07,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:07,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:07,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:07,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 10:43:07,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253040084] [2020-10-13 10:43:07,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:07,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:43:07,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934854494] [2020-10-13 10:43:07,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:43:07,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:43:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:07,986 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2020-10-13 10:43:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:08,112 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-10-13 10:43:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:43:08,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-13 10:43:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:08,113 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:43:08,113 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:43:08,114 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 10:43:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:43:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-10-13 10:43:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:43:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 10:43:08,125 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-13 10:43:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:08,126 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 10:43:08,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:43:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 10:43:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:43:08,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:08,127 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:08,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:43:08,127 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash -535736257, now seen corresponding path program 12 times [2020-10-13 10:43:08,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:08,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938821904] [2020-10-13 10:43:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:08,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:43:10,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:10,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2442 [2020-10-13 10:43:10,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:43:10,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:10,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:43:10,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:10,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:10,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:10,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:10,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:10,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 10:43:10,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938821904] [2020-10-13 10:43:10,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:10,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:43:10,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072198212] [2020-10-13 10:43:10,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:43:10,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:10,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:43:10,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:10,734 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-10-13 10:43:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:10,876 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-10-13 10:43:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:43:10,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-13 10:43:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:10,878 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:43:10,878 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:43:10,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:43:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-10-13 10:43:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:43:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 10:43:10,883 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-13 10:43:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:10,884 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 10:43:10,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:43:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 10:43:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:43:10,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:10,885 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:10,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:43:10,885 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:10,886 INFO L82 PathProgramCache]: Analyzing trace with hash -877622691, now seen corresponding path program 13 times [2020-10-13 10:43:10,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:10,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072046400] [2020-10-13 10:43:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:12,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:12,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:43:12,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:12,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1705 [2020-10-13 10:43:12,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:12,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:12,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 10:43:12,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:43:12,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:12,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:12,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:12,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:12,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:12,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:12,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:12,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 10:43:12,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072046400] [2020-10-13 10:43:12,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:12,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:43:12,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539090703] [2020-10-13 10:43:12,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:43:12,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:43:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:12,746 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 11 states. [2020-10-13 10:43:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:12,950 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-13 10:43:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:43:12,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-13 10:43:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:12,951 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:43:12,952 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:43:12,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:43:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 10:43:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:43:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 10:43:12,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-10-13 10:43:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:12,961 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 10:43:12,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:43:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 10:43:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:43:12,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:12,962 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:12,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:43:12,963 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1064650616, now seen corresponding path program 14 times [2020-10-13 10:43:12,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:12,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752912695] [2020-10-13 10:43:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:14,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:14,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:43:14,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:14,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-13 10:43:14,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:43:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:43:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:14,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:14,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:14,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:14,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:14,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:14,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:14,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:14,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:14,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:14,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:14,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 10:43:14,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752912695] [2020-10-13 10:43:14,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:14,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:43:14,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893489669] [2020-10-13 10:43:14,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:43:14,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:43:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:14,865 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2020-10-13 10:43:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:15,019 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2020-10-13 10:43:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:43:15,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-13 10:43:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:15,021 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:43:15,021 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:43:15,022 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 10:43:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:43:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-13 10:43:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:43:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 10:43:15,026 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-13 10:43:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:15,026 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 10:43:15,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:43:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 10:43:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:43:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:15,027 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:15,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:43:15,028 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1821450538, now seen corresponding path program 15 times [2020-10-13 10:43:15,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:15,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181035828] [2020-10-13 10:43:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:15,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:16,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:16,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:43:16,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1823 [2020-10-13 10:43:16,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:43:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:43:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:17,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:17,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:17,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:17,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:17,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 10:43:17,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181035828] [2020-10-13 10:43:17,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:17,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:43:17,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424969911] [2020-10-13 10:43:17,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:43:17,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:17,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:43:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:17,047 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 16 states. [2020-10-13 10:43:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:17,219 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-10-13 10:43:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:43:17,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-13 10:43:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:17,220 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:43:17,220 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:43:17,222 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 10:43:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:43:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2020-10-13 10:43:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:43:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-13 10:43:17,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-13 10:43:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:17,226 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-13 10:43:17,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:43:17,227 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-13 10:43:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:43:17,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:17,229 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:17,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:43:17,230 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:17,230 INFO L82 PathProgramCache]: Analyzing trace with hash 815786316, now seen corresponding path program 16 times [2020-10-13 10:43:17,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:17,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181307105] [2020-10-13 10:43:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:17,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:17,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:43:19,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:19,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2372 [2020-10-13 10:43:19,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:43:19,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 10:43:19,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:43:19,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:19,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:19,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:19,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 10:43:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181307105] [2020-10-13 10:43:19,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:19,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:43:19,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908525489] [2020-10-13 10:43:19,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:43:19,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:43:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:19,719 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 12 states. [2020-10-13 10:43:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:19,852 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-10-13 10:43:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:43:19,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-13 10:43:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:19,853 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:43:19,853 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:43:19,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:43:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 10:43:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:43:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 10:43:19,859 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2020-10-13 10:43:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:19,859 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 10:43:19,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:43:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 10:43:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:43:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:19,860 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:19,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:43:19,861 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1402781895, now seen corresponding path program 17 times [2020-10-13 10:43:19,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:19,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577569345] [2020-10-13 10:43:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:22,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:43:22,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:22,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-10-13 10:43:22,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:43:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:43:22,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:22,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:22,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:22,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:22,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:22,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:22,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:22,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:22,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-13 10:43:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577569345] [2020-10-13 10:43:22,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:22,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:43:22,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168502365] [2020-10-13 10:43:22,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:43:22,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:43:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:43:22,292 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 17 states. [2020-10-13 10:43:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:22,490 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2020-10-13 10:43:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:43:22,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-13 10:43:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:22,491 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:43:22,491 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:43:22,492 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 10:43:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:43:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-10-13 10:43:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:43:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 10:43:22,496 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2020-10-13 10:43:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:22,496 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 10:43:22,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:43:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 10:43:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:43:22,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:22,497 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:22,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:43:22,497 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1000981417, now seen corresponding path program 18 times [2020-10-13 10:43:22,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:22,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662109942] [2020-10-13 10:43:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:43:24,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2123 [2020-10-13 10:43:24,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 10:43:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:43:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:24,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:24,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:24,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:24,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:24,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 10:43:24,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662109942] [2020-10-13 10:43:24,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:24,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:43:24,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861716487] [2020-10-13 10:43:24,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:43:24,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:24,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:43:24,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:24,761 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 13 states. [2020-10-13 10:43:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:24,908 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-13 10:43:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:43:24,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-13 10:43:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:24,909 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:43:24,909 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:43:24,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:43:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-13 10:43:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:43:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 10:43:24,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 63 [2020-10-13 10:43:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:24,914 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 10:43:24,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:43:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 10:43:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:43:24,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:24,916 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:24,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:43:24,917 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash 447548494, now seen corresponding path program 19 times [2020-10-13 10:43:24,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:24,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547036631] [2020-10-13 10:43:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:24,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:43:27,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:27,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2611 [2020-10-13 10:43:27,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:27,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:43:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:43:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:27,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:27,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:27,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:27,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:43:27,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547036631] [2020-10-13 10:43:27,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:27,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:43:27,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981732102] [2020-10-13 10:43:27,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:43:27,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:27,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:43:27,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:27,781 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2020-10-13 10:43:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:28,002 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2020-10-13 10:43:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:43:28,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-10-13 10:43:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:28,004 INFO L225 Difference]: With dead ends: 131 [2020-10-13 10:43:28,004 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 10:43:28,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 10:43:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-13 10:43:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:43:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-13 10:43:28,014 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-13 10:43:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:28,014 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-13 10:43:28,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:43:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-13 10:43:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:43:28,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:28,016 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:28,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:43:28,018 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 390173168, now seen corresponding path program 20 times [2020-10-13 10:43:28,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:28,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90544853] [2020-10-13 10:43:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:28,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:33,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:33,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:43:33,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:43:33,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:43:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 10:43:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:43:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:33,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:33,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:33,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:33,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:33,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:33,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:33,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:33,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:33,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:33,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 10:43:33,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90544853] [2020-10-13 10:43:33,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:33,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:43:33,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766349693] [2020-10-13 10:43:33,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:43:33,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:43:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:33,157 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 14 states. [2020-10-13 10:43:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:33,300 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-10-13 10:43:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:43:33,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-13 10:43:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:33,301 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:43:33,302 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:43:33,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:43:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 10:43:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:43:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 10:43:33,306 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2020-10-13 10:43:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:33,306 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 10:43:33,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:43:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 10:43:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:43:33,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:33,307 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:33,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:43:33,307 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2100616171, now seen corresponding path program 21 times [2020-10-13 10:43:33,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:33,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692151540] [2020-10-13 10:43:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:33,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:35,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:35,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:43:35,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:35,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-13 10:43:35,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:43:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:43:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:35,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:35,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:35,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:35,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:35,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-13 10:43:35,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692151540] [2020-10-13 10:43:35,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:35,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:43:35,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736410933] [2020-10-13 10:43:35,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:43:35,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:43:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:43:35,857 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 19 states. [2020-10-13 10:43:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:36,095 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2020-10-13 10:43:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:43:36,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-10-13 10:43:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:36,097 INFO L225 Difference]: With dead ends: 139 [2020-10-13 10:43:36,097 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:43:36,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:43:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:43:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-13 10:43:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:43:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 10:43:36,105 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2020-10-13 10:43:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:36,106 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 10:43:36,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:43:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 10:43:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:43:36,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:36,107 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:36,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:43:36,108 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1270010803, now seen corresponding path program 22 times [2020-10-13 10:43:36,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:36,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105841739] [2020-10-13 10:43:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:38,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:38,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:43:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2626 [2020-10-13 10:43:38,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:43:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:43:38,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:38,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:38,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:38,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:38,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:38,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:38,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:38,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:38,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:38,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:38,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-13 10:43:38,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105841739] [2020-10-13 10:43:38,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:38,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:43:38,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639331433] [2020-10-13 10:43:38,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:43:38,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:43:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:43:38,990 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 20 states. [2020-10-13 10:43:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:39,173 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-10-13 10:43:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:43:39,174 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-10-13 10:43:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:39,175 INFO L225 Difference]: With dead ends: 145 [2020-10-13 10:43:39,176 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:43:39,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:43:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:43:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-10-13 10:43:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:43:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 10:43:39,184 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2020-10-13 10:43:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:39,185 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 10:43:39,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:43:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 10:43:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:43:39,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:39,186 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:39,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:43:39,186 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2037191633, now seen corresponding path program 23 times [2020-10-13 10:43:39,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:39,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285546580] [2020-10-13 10:43:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:39,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:43,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:43,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:43:43,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:43,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4626 [2020-10-13 10:43:43,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:43:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 10:43:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:43:43,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:43,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:43,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:43,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:43,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 10:43:43,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285546580] [2020-10-13 10:43:43,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:43,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:43:43,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041537334] [2020-10-13 10:43:43,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:43:43,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:43:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:43,955 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 15 states. [2020-10-13 10:43:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:44,141 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-10-13 10:43:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:43:44,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-13 10:43:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:44,143 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:43:44,144 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:43:44,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:43:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:43:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 10:43:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:43:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 10:43:44,148 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2020-10-13 10:43:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:44,149 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 10:43:44,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:43:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 10:43:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:43:44,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:44,150 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:44,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:43:44,150 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1479914860, now seen corresponding path program 24 times [2020-10-13 10:43:44,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:44,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713229568] [2020-10-13 10:43:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:44,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:44,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:47,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:43:47,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:47,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2973 [2020-10-13 10:43:47,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:43:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:43:47,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:47,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:47,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:47,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:47,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:47,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:47,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:47,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:47,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:47,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-13 10:43:47,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713229568] [2020-10-13 10:43:47,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:47,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:43:47,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469974215] [2020-10-13 10:43:47,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:43:47,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:43:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:47,390 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2020-10-13 10:43:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:47,606 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2020-10-13 10:43:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:43:47,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2020-10-13 10:43:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:47,607 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:43:47,608 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:43:47,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:43:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-13 10:43:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:43:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-13 10:43:47,618 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-13 10:43:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:47,618 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-13 10:43:47,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:43:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-13 10:43:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:43:47,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:47,620 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:47,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:43:47,620 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1739156790, now seen corresponding path program 25 times [2020-10-13 10:43:47,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:47,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717968522] [2020-10-13 10:43:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:50,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:43:50,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3232 [2020-10-13 10:43:50,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:43:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 10:43:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:43:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:50,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:51,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 10:43:51,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717968522] [2020-10-13 10:43:51,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:51,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:43:51,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444041400] [2020-10-13 10:43:51,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:43:51,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:43:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:51,009 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 16 states. [2020-10-13 10:43:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:51,185 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-10-13 10:43:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:43:51,186 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2020-10-13 10:43:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:51,187 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:43:51,188 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:43:51,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:43:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 10:43:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 10:43:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-13 10:43:51,193 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2020-10-13 10:43:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:51,194 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-13 10:43:51,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:43:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-13 10:43:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 10:43:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:51,195 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:51,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:43:51,195 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:51,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:51,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1756445455, now seen corresponding path program 26 times [2020-10-13 10:43:51,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:51,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752262734] [2020-10-13 10:43:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:51,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:54,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3380 [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:54,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:43:54,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:54,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:54,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:54,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:54,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:54,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:54,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-13 10:43:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752262734] [2020-10-13 10:43:54,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:54,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:43:54,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367898710] [2020-10-13 10:43:54,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:43:54,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:54,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:43:54,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:43:54,862 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 22 states. [2020-10-13 10:43:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:55,096 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-10-13 10:43:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:43:55,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2020-10-13 10:43:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:55,097 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:43:55,097 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:43:55,098 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 10:43:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:43:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-13 10:43:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:43:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-13 10:43:55,103 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2020-10-13 10:43:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:55,103 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-13 10:43:55,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:43:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-13 10:43:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 10:43:55,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:55,105 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:55,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:43:55,105 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash -714576467, now seen corresponding path program 27 times [2020-10-13 10:43:55,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:55,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534040060] [2020-10-13 10:43:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:55,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:59,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:59,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4191 [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:43:59,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:59,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:59,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:59,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:59,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-13 10:43:59,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534040060] [2020-10-13 10:43:59,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:59,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:43:59,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724708151] [2020-10-13 10:43:59,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:43:59,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:43:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:43:59,599 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 23 states. [2020-10-13 10:43:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:59,835 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2020-10-13 10:43:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:43:59,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-10-13 10:43:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:59,837 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:43:59,837 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 10:43:59,838 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 10:43:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 10:43:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 88. [2020-10-13 10:43:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 10:43:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 10:43:59,844 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2020-10-13 10:43:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:59,844 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 10:43:59,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:43:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 10:43:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 10:43:59,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:59,846 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:59,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:43:59,846 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -249728821, now seen corresponding path program 28 times [2020-10-13 10:43:59,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:59,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590403394] [2020-10-13 10:43:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:59,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:04,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:44:04,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:05,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:05,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:05,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:05,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:05,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 10:44:05,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590403394] [2020-10-13 10:44:05,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:05,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:44:05,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327897302] [2020-10-13 10:44:05,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:44:05,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:05,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:44:05,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:44:05,026 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 17 states. [2020-10-13 10:44:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:05,216 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-13 10:44:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:44:05,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 87 [2020-10-13 10:44:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:05,218 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:44:05,218 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:44:05,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:44:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:44:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-13 10:44:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:44:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-13 10:44:05,231 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 87 [2020-10-13 10:44:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:05,231 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-13 10:44:05,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:44:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-13 10:44:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:44:05,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:05,234 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:05,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:44:05,235 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash -60943526, now seen corresponding path program 29 times [2020-10-13 10:44:05,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:05,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819730904] [2020-10-13 10:44:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:44:09,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4701 [2020-10-13 10:44:09,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:44:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:44:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:10,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:10,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:10,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:10,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:10,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:10,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-13 10:44:10,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819730904] [2020-10-13 10:44:10,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:10,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:44:10,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456820088] [2020-10-13 10:44:10,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:44:10,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:10,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:44:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:44:10,261 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2020-10-13 10:44:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:10,468 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-10-13 10:44:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:44:10,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2020-10-13 10:44:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:10,470 INFO L225 Difference]: With dead ends: 175 [2020-10-13 10:44:10,470 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:44:10,471 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 10:44:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:44:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-13 10:44:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:44:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-13 10:44:10,474 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-13 10:44:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:10,475 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-13 10:44:10,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:44:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-13 10:44:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 10:44:10,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:10,476 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:10,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:44:10,476 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 998527740, now seen corresponding path program 30 times [2020-10-13 10:44:10,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:10,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043482226] [2020-10-13 10:44:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:10,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:15,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:15,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:44:15,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:15,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:44:15,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:44:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:44:15,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:15,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:15,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:15,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:15,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:15,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:15,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:15,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:15,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:15,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-13 10:44:15,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043482226] [2020-10-13 10:44:15,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:15,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:44:15,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322883307] [2020-10-13 10:44:15,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:44:15,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:44:15,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:44:15,805 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 25 states. [2020-10-13 10:44:16,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:16,075 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2020-10-13 10:44:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:44:16,075 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2020-10-13 10:44:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:16,077 INFO L225 Difference]: With dead ends: 181 [2020-10-13 10:44:16,077 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:44:16,077 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 10:44:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:44:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2020-10-13 10:44:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:44:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-13 10:44:16,082 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-13 10:44:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:16,082 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-13 10:44:16,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:44:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-13 10:44:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:44:16,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:16,084 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:16,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:44:16,085 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1243165214, now seen corresponding path program 31 times [2020-10-13 10:44:16,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:16,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357610711] [2020-10-13 10:44:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:16,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:16,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:21,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:21,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:44:21,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:21,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:44:21,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:44:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 10:44:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:44:21,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:21,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:21,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:21,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:21,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:21,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:21,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:21,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 10:44:21,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357610711] [2020-10-13 10:44:21,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:21,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:44:21,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426661465] [2020-10-13 10:44:21,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:44:21,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:44:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:44:21,283 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 18 states. [2020-10-13 10:44:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:21,478 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-10-13 10:44:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:44:21,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-10-13 10:44:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:21,480 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:44:21,480 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 10:44:21,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:44:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 10:44:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 10:44:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 10:44:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-10-13 10:44:21,486 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2020-10-13 10:44:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:21,486 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-10-13 10:44:21,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:44:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-10-13 10:44:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 10:44:21,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:21,487 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:21,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:44:21,488 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 358903079, now seen corresponding path program 32 times [2020-10-13 10:44:21,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:21,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461671991] [2020-10-13 10:44:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:21,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:26,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:26,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:44:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:26,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:26,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:26,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:26,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:26,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-13 10:44:26,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461671991] [2020-10-13 10:44:26,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:26,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:44:26,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432548165] [2020-10-13 10:44:26,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:44:26,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:26,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:44:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:44:26,852 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 26 states. [2020-10-13 10:44:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:27,128 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-13 10:44:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:44:27,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2020-10-13 10:44:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:27,130 INFO L225 Difference]: With dead ends: 189 [2020-10-13 10:44:27,130 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:44:27,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:44:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:44:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2020-10-13 10:44:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:44:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 10:44:27,136 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2020-10-13 10:44:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:27,137 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 10:44:27,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:44:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 10:44:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 10:44:27,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:27,141 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:27,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:44:27,141 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:27,141 INFO L82 PathProgramCache]: Analyzing trace with hash -972573883, now seen corresponding path program 33 times [2020-10-13 10:44:27,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:27,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812463034] [2020-10-13 10:44:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:27,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:32,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:32,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:44:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:32,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:32,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:32,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:32,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:32,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:32,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:32,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:32,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:32,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:32,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 10:44:32,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812463034] [2020-10-13 10:44:32,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:32,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:44:32,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729175528] [2020-10-13 10:44:32,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:44:32,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:44:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:44:32,357 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 19 states. [2020-10-13 10:44:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:32,567 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-10-13 10:44:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:44:32,567 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 99 [2020-10-13 10:44:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:32,569 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:44:32,569 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:44:32,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:44:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:44:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-13 10:44:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:44:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-13 10:44:32,578 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2020-10-13 10:44:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:32,578 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-13 10:44:32,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:44:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-13 10:44:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:44:32,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:32,580 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:32,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:44:32,580 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash 627836576, now seen corresponding path program 34 times [2020-10-13 10:44:32,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:32,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869575693] [2020-10-13 10:44:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:37,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:44:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:37,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:37,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:37,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:37,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:37,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-13 10:44:37,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869575693] [2020-10-13 10:44:37,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:37,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:44:37,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407650628] [2020-10-13 10:44:37,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:44:37,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:44:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:44:37,984 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2020-10-13 10:44:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:38,217 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-10-13 10:44:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:44:38,218 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-10-13 10:44:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:38,219 INFO L225 Difference]: With dead ends: 197 [2020-10-13 10:44:38,220 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 10:44:38,220 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 10:44:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 10:44:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-13 10:44:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:44:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-13 10:44:38,226 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-13 10:44:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:38,227 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-13 10:44:38,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:44:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-13 10:44:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:44:38,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:38,228 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:38,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:44:38,229 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 152429378, now seen corresponding path program 35 times [2020-10-13 10:44:38,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:38,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053157888] [2020-10-13 10:44:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:38,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:43,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:43,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 10:44:43,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:43,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:44:43,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:44:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 10:44:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:44:43,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:43,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:43,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:43,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 10:44:43,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053157888] [2020-10-13 10:44:43,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:43,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:44:43,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559196507] [2020-10-13 10:44:43,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:44:43,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:44:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:44:43,446 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 20 states. [2020-10-13 10:44:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:43,655 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-10-13 10:44:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:44:43,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-10-13 10:44:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:43,658 INFO L225 Difference]: With dead ends: 114 [2020-10-13 10:44:43,658 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:44:43,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:44:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:44:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 10:44:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:44:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-10-13 10:44:43,664 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2020-10-13 10:44:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:43,664 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-10-13 10:44:43,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:44:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-10-13 10:44:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 10:44:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:43,665 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:43,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:44:43,666 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1970174339, now seen corresponding path program 36 times [2020-10-13 10:44:43,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:43,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37228133] [2020-10-13 10:44:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:44,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:44:48,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:49,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:49,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:49,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:49,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:49,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:49,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:49,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:49,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:49,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:49,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-13 10:44:49,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37228133] [2020-10-13 10:44:49,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:49,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:44:49,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003742601] [2020-10-13 10:44:49,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:44:49,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:44:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:44:49,092 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 28 states. [2020-10-13 10:44:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:49,373 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2020-10-13 10:44:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:44:49,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-10-13 10:44:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:49,374 INFO L225 Difference]: With dead ends: 205 [2020-10-13 10:44:49,375 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:44:49,375 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 10:44:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:44:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 110. [2020-10-13 10:44:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 10:44:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-13 10:44:49,386 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2020-10-13 10:44:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:49,386 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-13 10:44:49,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:44:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-13 10:44:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 10:44:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:49,387 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:49,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:44:49,388 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash -234933727, now seen corresponding path program 37 times [2020-10-13 10:44:49,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:49,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922009160] [2020-10-13 10:44:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:49,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:50,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:54,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:44:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:54,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:54,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:54,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:54,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:54,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:54,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:54,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:54,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-13 10:44:54,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922009160] [2020-10-13 10:44:54,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:54,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:44:54,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794364057] [2020-10-13 10:44:54,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:44:54,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:54,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:44:54,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:44:54,978 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 29 states. [2020-10-13 10:44:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:55,319 INFO L93 Difference]: Finished difference Result 211 states and 224 transitions. [2020-10-13 10:44:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:44:55,320 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-10-13 10:44:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:55,322 INFO L225 Difference]: With dead ends: 211 [2020-10-13 10:44:55,322 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:44:55,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:44:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:44:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-10-13 10:44:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:44:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-13 10:44:55,331 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2020-10-13 10:44:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:55,331 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-13 10:44:55,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:44:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-13 10:44:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:44:55,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:55,333 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:55,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:44:55,334 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1924908225, now seen corresponding path program 38 times [2020-10-13 10:44:55,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:55,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110246124] [2020-10-13 10:44:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:56,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:00,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:00,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:45:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:00,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:00,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:00,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:00,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:00,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:00,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:00,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:45:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 10:45:00,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110246124] [2020-10-13 10:45:00,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:00,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:45:00,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90452300] [2020-10-13 10:45:00,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:45:00,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:45:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:45:00,652 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 21 states. [2020-10-13 10:45:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:00,928 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2020-10-13 10:45:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:45:00,929 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-10-13 10:45:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:00,931 INFO L225 Difference]: With dead ends: 121 [2020-10-13 10:45:00,931 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 10:45:00,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:45:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 10:45:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-13 10:45:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:45:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-13 10:45:00,943 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 111 [2020-10-13 10:45:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:00,945 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-13 10:45:00,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:45:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-13 10:45:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 10:45:00,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:00,947 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:00,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:45:00,947 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2105555866, now seen corresponding path program 39 times [2020-10-13 10:45:00,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:00,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226007901] [2020-10-13 10:45:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:00,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:05,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:45:05,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:06,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:06,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:06,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:06,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:06,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:06,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:06,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 10:45:06,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226007901] [2020-10-13 10:45:06,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:06,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:45:06,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981253377] [2020-10-13 10:45:06,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:45:06,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:45:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:45:06,457 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2020-10-13 10:45:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:06,751 INFO L93 Difference]: Finished difference Result 219 states and 232 transitions. [2020-10-13 10:45:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:45:06,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2020-10-13 10:45:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:06,756 INFO L225 Difference]: With dead ends: 219 [2020-10-13 10:45:06,756 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 10:45:06,757 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 10:45:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 10:45:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 117. [2020-10-13 10:45:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:45:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-13 10:45:06,762 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2020-10-13 10:45:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:06,763 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-13 10:45:06,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:45:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-13 10:45:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 10:45:06,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:06,764 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:06,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:45:06,764 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1188446712, now seen corresponding path program 40 times [2020-10-13 10:45:06,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:06,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533403980] [2020-10-13 10:45:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:06,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:11,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:11,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 10:45:11,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:11,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 10:45:11,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:11,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:45:11,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 10:45:11,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:45:11,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:12,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:12,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:12,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:12,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:12,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:12,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:12,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:12,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:12,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:12,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 10:45:12,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533403980] [2020-10-13 10:45:12,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:12,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:45:12,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361231959] [2020-10-13 10:45:12,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:45:12,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:12,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:45:12,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:45:12,045 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 22 states. [2020-10-13 10:45:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:12,266 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2020-10-13 10:45:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:45:12,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2020-10-13 10:45:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:12,267 INFO L225 Difference]: With dead ends: 126 [2020-10-13 10:45:12,267 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 10:45:12,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:45:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 10:45:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 10:45:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 10:45:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-10-13 10:45:12,278 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2020-10-13 10:45:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:12,278 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-10-13 10:45:12,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:45:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-10-13 10:45:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 10:45:12,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:12,280 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:12,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:45:12,280 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash -873570051, now seen corresponding path program 41 times [2020-10-13 10:45:12,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:12,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389569083] [2020-10-13 10:45:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:12,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:17,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:17,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 10:45:17,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:17,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:45:17,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:45:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:45:17,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:17,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:17,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:17,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:17,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:17,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:17,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:17,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:17,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:17,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:17,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:17,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-13 10:45:17,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389569083] [2020-10-13 10:45:17,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:17,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:45:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683920189] [2020-10-13 10:45:17,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:45:17,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:17,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:45:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:45:17,763 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 31 states. [2020-10-13 10:45:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:18,120 INFO L93 Difference]: Finished difference Result 227 states and 240 transitions. [2020-10-13 10:45:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:45:18,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 119 [2020-10-13 10:45:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:18,122 INFO L225 Difference]: With dead ends: 227 [2020-10-13 10:45:18,122 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 10:45:18,123 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 10:45:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 10:45:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2020-10-13 10:45:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 10:45:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-13 10:45:18,129 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2020-10-13 10:45:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:18,129 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-13 10:45:18,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:45:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-13 10:45:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 10:45:18,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:18,130 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:18,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:45:18,131 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1376328859, now seen corresponding path program 42 times [2020-10-13 10:45:18,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:18,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730863194] [2020-10-13 10:45:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:18,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:18,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:23,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:23,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:45:23,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:23,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:23,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:23,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:23,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:23,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:23,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:23,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:23,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:23,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:23,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-13 10:45:23,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730863194] [2020-10-13 10:45:23,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:23,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:45:23,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690777695] [2020-10-13 10:45:23,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:45:23,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:23,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:45:23,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:45:23,699 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 32 states. [2020-10-13 10:45:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:24,050 INFO L93 Difference]: Finished difference Result 233 states and 247 transitions. [2020-10-13 10:45:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:45:24,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 121 [2020-10-13 10:45:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:24,052 INFO L225 Difference]: With dead ends: 233 [2020-10-13 10:45:24,052 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 10:45:24,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:45:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 10:45:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2020-10-13 10:45:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 10:45:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-10-13 10:45:24,058 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2020-10-13 10:45:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:24,058 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-10-13 10:45:24,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:45:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-10-13 10:45:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 10:45:24,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:24,059 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:24,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:45:24,060 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1134335815, now seen corresponding path program 43 times [2020-10-13 10:45:24,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:24,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377691373] [2020-10-13 10:45:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:24,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:24,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:45:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 10:45:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:45:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:29,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:29,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:29,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 10:45:29,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377691373] [2020-10-13 10:45:29,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:29,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:45:29,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705199245] [2020-10-13 10:45:29,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:45:29,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:45:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:45:29,368 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 23 states. [2020-10-13 10:45:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:29,610 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2020-10-13 10:45:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:45:29,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 123 [2020-10-13 10:45:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:29,612 INFO L225 Difference]: With dead ends: 133 [2020-10-13 10:45:29,613 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 10:45:29,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:45:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 10:45:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-13 10:45:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:45:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-13 10:45:29,626 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 123 [2020-10-13 10:45:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:29,627 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-13 10:45:29,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:45:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-13 10:45:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 10:45:29,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:29,629 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:29,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:45:29,629 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 531426476, now seen corresponding path program 44 times [2020-10-13 10:45:29,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:29,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103615221] [2020-10-13 10:45:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:29,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:30,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:34,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:45:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:35,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:35,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:35,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:35,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-13 10:45:35,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103615221] [2020-10-13 10:45:35,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:35,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:45:35,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132319426] [2020-10-13 10:45:35,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:45:35,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:35,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:45:35,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:45:35,230 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2020-10-13 10:45:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:35,565 INFO L93 Difference]: Finished difference Result 241 states and 255 transitions. [2020-10-13 10:45:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:45:35,565 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2020-10-13 10:45:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:35,567 INFO L225 Difference]: With dead ends: 241 [2020-10-13 10:45:35,567 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 10:45:35,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:45:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 10:45:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-13 10:45:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:45:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-13 10:45:35,575 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2020-10-13 10:45:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:35,575 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-13 10:45:35,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:45:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-13 10:45:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 10:45:35,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:35,578 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:35,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:45:35,578 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 18056014, now seen corresponding path program 45 times [2020-10-13 10:45:35,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:35,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252634933] [2020-10-13 10:45:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:36,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:40,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:45:40,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:41,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:41,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:41,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:41,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:41,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:41,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:41,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-13 10:45:41,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252634933] [2020-10-13 10:45:41,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:41,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:45:41,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54593607] [2020-10-13 10:45:41,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:45:41,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:41,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:45:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:45:41,207 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 34 states. [2020-10-13 10:45:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:41,561 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2020-10-13 10:45:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:45:41,561 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-10-13 10:45:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:41,562 INFO L225 Difference]: With dead ends: 247 [2020-10-13 10:45:41,563 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 10:45:41,563 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 10:45:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 10:45:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2020-10-13 10:45:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 10:45:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-10-13 10:45:41,570 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2020-10-13 10:45:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:41,570 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-10-13 10:45:41,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:45:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-10-13 10:45:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 10:45:41,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:41,572 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:41,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:45:41,574 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash 590281072, now seen corresponding path program 46 times [2020-10-13 10:45:41,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:41,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312910426] [2020-10-13 10:45:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:43,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:46,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:46,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 10:45:46,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:46,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 10:45:46,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:45:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 10:45:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:45:46,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:46,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:46,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:46,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:46,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:46,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 10:45:46,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312910426] [2020-10-13 10:45:46,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:46,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:45:46,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442707126] [2020-10-13 10:45:46,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:45:46,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:45:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:45:46,924 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 24 states. [2020-10-13 10:45:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:47,189 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2020-10-13 10:45:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:45:47,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 130 [2020-10-13 10:45:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:47,193 INFO L225 Difference]: With dead ends: 140 [2020-10-13 10:45:47,194 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 10:45:47,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:45:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 10:45:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-13 10:45:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:45:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-10-13 10:45:47,199 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2020-10-13 10:45:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:47,200 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-10-13 10:45:47,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:45:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-10-13 10:45:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 10:45:47,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:47,201 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:47,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:45:47,201 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2100654955, now seen corresponding path program 47 times [2020-10-13 10:45:47,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:47,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626299647] [2020-10-13 10:45:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:45:52,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:52,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:52,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:52,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-13 10:45:52,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626299647] [2020-10-13 10:45:52,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:52,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:45:52,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343130047] [2020-10-13 10:45:52,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:45:52,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:52,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:45:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:45:52,872 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 35 states. [2020-10-13 10:45:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:53,170 INFO L93 Difference]: Finished difference Result 255 states and 270 transitions. [2020-10-13 10:45:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:45:53,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-13 10:45:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:53,172 INFO L225 Difference]: With dead ends: 255 [2020-10-13 10:45:53,172 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 10:45:53,173 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 10:45:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 10:45:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 136. [2020-10-13 10:45:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:45:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-10-13 10:45:53,178 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2020-10-13 10:45:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:53,178 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-10-13 10:45:53,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:45:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-10-13 10:45:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 10:45:53,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:53,180 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:53,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:45:53,180 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash 258841523, now seen corresponding path program 48 times [2020-10-13 10:45:53,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:53,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601000286] [2020-10-13 10:45:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:54,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:58,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:45:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:58,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:58,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:58,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:58,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:58,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:58,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:58,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 10:45:58,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601000286] [2020-10-13 10:45:58,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:58,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:45:58,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896143514] [2020-10-13 10:45:58,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:45:58,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:45:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:45:58,522 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 25 states. [2020-10-13 10:45:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:58,750 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-10-13 10:45:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:45:58,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2020-10-13 10:45:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:58,752 INFO L225 Difference]: With dead ends: 145 [2020-10-13 10:45:58,752 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 10:45:58,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:45:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 10:45:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-13 10:45:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:45:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-10-13 10:45:58,758 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 135 [2020-10-13 10:45:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:58,759 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-10-13 10:45:58,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:45:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-10-13 10:45:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 10:45:58,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:58,760 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:58,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:45:58,760 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1886445710, now seen corresponding path program 49 times [2020-10-13 10:45:58,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:58,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516115719] [2020-10-13 10:45:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:03,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:46:03,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:04,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:04,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:04,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:04,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:04,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-13 10:46:04,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516115719] [2020-10-13 10:46:04,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:04,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:46:04,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203275839] [2020-10-13 10:46:04,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:46:04,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:46:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:46:04,487 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2020-10-13 10:46:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:04,834 INFO L93 Difference]: Finished difference Result 263 states and 278 transitions. [2020-10-13 10:46:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:46:04,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2020-10-13 10:46:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:04,836 INFO L225 Difference]: With dead ends: 263 [2020-10-13 10:46:04,836 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 10:46:04,837 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 10:46:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 10:46:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 141. [2020-10-13 10:46:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:46:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-13 10:46:04,844 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2020-10-13 10:46:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:04,844 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-13 10:46:04,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:46:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-13 10:46:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 10:46:04,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:04,845 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:04,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:46:04,845 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1018090260, now seen corresponding path program 50 times [2020-10-13 10:46:04,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:04,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193221334] [2020-10-13 10:46:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:09,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:09,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 10:46:09,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:46:09,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:46:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 10:46:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:46:09,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:10,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:10,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:10,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:10,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-13 10:46:10,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193221334] [2020-10-13 10:46:10,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:10,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:46:10,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243802839] [2020-10-13 10:46:10,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:46:10,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:46:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:46:10,223 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 26 states. [2020-10-13 10:46:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:10,476 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2020-10-13 10:46:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:46:10,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 140 [2020-10-13 10:46:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:10,479 INFO L225 Difference]: With dead ends: 150 [2020-10-13 10:46:10,479 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 10:46:10,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:46:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 10:46:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 10:46:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 10:46:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-10-13 10:46:10,484 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2020-10-13 10:46:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:10,484 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-10-13 10:46:10,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:46:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-10-13 10:46:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 10:46:10,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:10,485 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:10,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:46:10,486 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:10,486 INFO L82 PathProgramCache]: Analyzing trace with hash -405102479, now seen corresponding path program 51 times [2020-10-13 10:46:10,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:10,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852829109] [2020-10-13 10:46:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:10,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:11,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:15,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:46:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:16,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:16,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:16,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:16,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:16,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:16,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:16,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:16,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-13 10:46:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852829109] [2020-10-13 10:46:16,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:16,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:46:16,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416161153] [2020-10-13 10:46:16,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:46:16,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:46:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:46:16,234 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 37 states. [2020-10-13 10:46:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:16,709 INFO L93 Difference]: Finished difference Result 271 states and 286 transitions. [2020-10-13 10:46:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:46:16,709 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 143 [2020-10-13 10:46:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:16,711 INFO L225 Difference]: With dead ends: 271 [2020-10-13 10:46:16,711 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 10:46:16,712 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 10:46:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 10:46:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-10-13 10:46:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 10:46:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-10-13 10:46:16,719 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2020-10-13 10:46:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:16,720 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-10-13 10:46:16,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:46:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-10-13 10:46:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 10:46:16,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:16,722 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:16,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:46:16,722 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash 503570959, now seen corresponding path program 52 times [2020-10-13 10:46:16,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:16,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465730666] [2020-10-13 10:46:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:21,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:21,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:46:21,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:22,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:22,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:22,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-13 10:46:22,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465730666] [2020-10-13 10:46:22,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:22,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:46:22,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653045973] [2020-10-13 10:46:22,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:46:22,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:22,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:46:22,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:46:22,520 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 38 states. [2020-10-13 10:46:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:22,945 INFO L93 Difference]: Finished difference Result 277 states and 293 transitions. [2020-10-13 10:46:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:46:22,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 145 [2020-10-13 10:46:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:22,947 INFO L225 Difference]: With dead ends: 277 [2020-10-13 10:46:22,947 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 10:46:22,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:46:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 10:46:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 148. [2020-10-13 10:46:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 10:46:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-10-13 10:46:22,953 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2020-10-13 10:46:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:22,954 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-10-13 10:46:22,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:46:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-10-13 10:46:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 10:46:22,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:22,956 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:22,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:46:22,958 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1860383789, now seen corresponding path program 53 times [2020-10-13 10:46:22,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:22,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951237258] [2020-10-13 10:46:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:28,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:46:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:28,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:28,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:28,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1897 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-13 10:46:28,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951237258] [2020-10-13 10:46:28,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:28,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:46:28,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020155374] [2020-10-13 10:46:28,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:46:28,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:28,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:46:28,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:46:28,372 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 27 states. [2020-10-13 10:46:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:28,657 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2020-10-13 10:46:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:46:28,658 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2020-10-13 10:46:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:28,659 INFO L225 Difference]: With dead ends: 157 [2020-10-13 10:46:28,660 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:46:28,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:46:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:46:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-13 10:46:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:46:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-10-13 10:46:28,665 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 147 [2020-10-13 10:46:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:28,666 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-10-13 10:46:28,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:46:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-10-13 10:46:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 10:46:28,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:28,667 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:28,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:46:28,667 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:28,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1162476728, now seen corresponding path program 54 times [2020-10-13 10:46:28,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:28,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561861531] [2020-10-13 10:46:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:33,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:33,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 10:46:33,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:33,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:46:33,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:33,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:46:33,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:33,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:46:33,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:34,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:34,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:34,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:34,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:34,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:46:34,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-13 10:46:34,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561861531] [2020-10-13 10:46:34,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:34,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:46:34,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124877962] [2020-10-13 10:46:34,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:46:34,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:34,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:46:34,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:46:34,482 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2020-10-13 10:46:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:34,861 INFO L93 Difference]: Finished difference Result 285 states and 301 transitions. [2020-10-13 10:46:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:46:34,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2020-10-13 10:46:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:34,864 INFO L225 Difference]: With dead ends: 285 [2020-10-13 10:46:34,864 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 10:46:34,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:46:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 10:46:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 153. [2020-10-13 10:46:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:46:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-13 10:46:34,870 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2020-10-13 10:46:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:34,870 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-13 10:46:34,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:46:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-13 10:46:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 10:46:34,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:34,871 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:34,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:46:34,871 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash -933278374, now seen corresponding path program 55 times [2020-10-13 10:46:34,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:34,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680209872] [2020-10-13 10:46:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:39,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:39,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 10:46:39,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:39,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 10:46:39,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:46:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:46:39,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:40,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:40,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:40,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-13 10:46:40,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680209872] [2020-10-13 10:46:40,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:40,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:46:40,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131865631] [2020-10-13 10:46:40,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:46:40,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:46:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:46:40,790 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 40 states. [2020-10-13 10:46:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:41,221 INFO L93 Difference]: Finished difference Result 291 states and 308 transitions. [2020-10-13 10:46:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:46:41,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 152 [2020-10-13 10:46:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:41,222 INFO L225 Difference]: With dead ends: 291 [2020-10-13 10:46:41,222 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 10:46:41,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:46:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 10:46:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 155. [2020-10-13 10:46:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 10:46:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-13 10:46:41,226 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2020-10-13 10:46:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:41,226 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-13 10:46:41,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:46:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-13 10:46:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 10:46:41,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:41,228 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:41,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:46:41,228 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -614269572, now seen corresponding path program 56 times [2020-10-13 10:46:41,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:41,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064450995] [2020-10-13 10:46:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:43,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking...