/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:12:02,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:12:02,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:12:02,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:12:02,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:12:02,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:12:02,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:12:02,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:12:02,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:12:02,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:12:02,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:12:02,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:12:02,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:12:02,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:12:02,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:12:02,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:12:02,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:12:02,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:12:02,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:12:02,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:12:02,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:12:02,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:12:02,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:12:02,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:12:02,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:12:02,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:12:02,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:12:02,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:12:02,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:12:02,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:12:02,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:12:02,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:12:02,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:12:02,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:12:02,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:12:02,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:12:02,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:12:02,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:12:02,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:12:02,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:12:02,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:12:02,316 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 05:12:02,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:12:02,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:12:02,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:12:02,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:12:02,340 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:12:02,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:12:02,340 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:12:02,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:12:02,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:12:02,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:12:02,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:12:02,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:12:02,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:12:02,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:12:02,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:12:02,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:12:02,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:12:02,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:12:02,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:12:02,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:12:02,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:12:02,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:12:02,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:12:02,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:12:02,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:12:02,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:12:02,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:12:02,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:12:02,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:12:02,345 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 05:12:02,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:12:02,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:12:02,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:12:02,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:12:02,700 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:12:02,701 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-13 05:12:02,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9dd6386be/e72170f2b28b45be9a87c93d9f694fc1/FLAG4676140da [2020-10-13 05:12:03,208 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:12:03,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-13 05:12:03,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9dd6386be/e72170f2b28b45be9a87c93d9f694fc1/FLAG4676140da [2020-10-13 05:12:03,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9dd6386be/e72170f2b28b45be9a87c93d9f694fc1 [2020-10-13 05:12:03,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:12:03,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:12:03,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:12:03,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:12:03,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:12:03,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:03,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4076c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03, skipping insertion in model container [2020-10-13 05:12:03,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:03,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:12:03,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:12:03,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:12:03,853 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:12:03,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:12:03,909 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:12:03,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03 WrapperNode [2020-10-13 05:12:03,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:12:03,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:12:03,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:12:03,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:12:04,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (1/1) ... [2020-10-13 05:12:04,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:12:04,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:12:04,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:12:04,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:12:04,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (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 05:12:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:12:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:12:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:12:04,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:12:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:12:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:12:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:12:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:12:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:12:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:12:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:12:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:12:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:12:04,369 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:12:04,369 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:12:04,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:12:04 BoogieIcfgContainer [2020-10-13 05:12:04,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:12:04,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:12:04,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:12:04,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:12:04,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:12:03" (1/3) ... [2020-10-13 05:12:04,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66575261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:12:04, skipping insertion in model container [2020-10-13 05:12:04,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:03" (2/3) ... [2020-10-13 05:12:04,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66575261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:12:04, skipping insertion in model container [2020-10-13 05:12:04,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:12:04" (3/3) ... [2020-10-13 05:12:04,382 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2020-10-13 05:12:04,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:12:04,403 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:12:04,417 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:12:04,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:12:04,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:12:04,440 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:12:04,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:12:04,440 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:12:04,441 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:12:04,441 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:12:04,441 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:12:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 05:12:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 05:12:04,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:04,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:04,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash -423135907, now seen corresponding path program 1 times [2020-10-13 05:12:04,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:04,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547840593] [2020-10-13 05:12:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:04,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 05:12:04,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:04,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-13 05:12:04,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:12:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:12:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:04,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:04,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:04,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:04,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:12:04,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:04,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:04,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:04,764 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 05:12:04,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547840593] [2020-10-13 05:12:04,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:12:04,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:12:04,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681350824] [2020-10-13 05:12:04,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:12:04,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:12:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:12:04,795 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-13 05:12:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:05,004 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-13 05:12:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:12:05,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 05:12:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:05,017 INFO L225 Difference]: With dead ends: 42 [2020-10-13 05:12:05,017 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 05:12:05,020 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 05:12:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 05:12:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 05:12:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:12:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 05:12:05,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-10-13 05:12:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:05,056 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 05:12:05,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:12:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 05:12:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 05:12:05,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:05,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:05,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:12:05,058 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1453190697, now seen corresponding path program 1 times [2020-10-13 05:12:05,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:05,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410805732] [2020-10-13 05:12:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 05:12:05,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 05:12:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:12:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:12:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:05,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:05,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:05,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:12:05,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:05,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:05,202 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 05:12:05,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410805732] [2020-10-13 05:12:05,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:12:05,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:12:05,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184189162] [2020-10-13 05:12:05,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:12:05,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:12:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:12:05,207 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 05:12:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:05,326 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-13 05:12:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:12:05,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 05:12:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:05,329 INFO L225 Difference]: With dead ends: 39 [2020-10-13 05:12:05,330 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 05:12:05,331 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 05:12:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 05:12:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-13 05:12:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:12:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 05:12:05,342 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2020-10-13 05:12:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:05,343 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 05:12:05,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:12:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 05:12:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:12:05,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:05,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:05,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:12:05,346 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -769700427, now seen corresponding path program 1 times [2020-10-13 05:12:05,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:05,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038201963] [2020-10-13 05:12:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:05,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:12:05,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:05,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-13 05:12:05,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:12:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:12:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:12:05,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:05,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:05,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:05,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:05,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:05,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:05,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:05,816 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 05:12:05,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038201963] [2020-10-13 05:12:05,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:05,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:12:05,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498379685] [2020-10-13 05:12:05,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:12:05,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:12:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:12:05,821 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 05:12:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:05,914 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 05:12:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:12:05,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 05:12:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:05,916 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:12:05,916 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 05:12:05,917 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 05:12:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 05:12:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 05:12:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:12:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 05:12:05,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2020-10-13 05:12:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:05,926 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 05:12:05,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:12:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 05:12:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:12:05,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:05,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:05,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:12:05,927 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1065547245, now seen corresponding path program 2 times [2020-10-13 05:12:05,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:05,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877684917] [2020-10-13 05:12:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:06,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:12:06,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:06,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-13 05:12:06,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:06,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:12:06,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:06,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:12:06,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:06,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:06,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:06,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:06,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:06,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:06,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:06,149 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 05:12:06,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877684917] [2020-10-13 05:12:06,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:06,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:12:06,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773892475] [2020-10-13 05:12:06,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:12:06,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:12:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:12:06,152 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-13 05:12:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:06,257 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-13 05:12:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:12:06,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 05:12:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:06,259 INFO L225 Difference]: With dead ends: 62 [2020-10-13 05:12:06,259 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 05:12:06,260 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 05:12:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 05:12:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-13 05:12:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 05:12:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-13 05:12:06,268 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2020-10-13 05:12:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:06,269 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-13 05:12:06,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:12:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-13 05:12:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:12:06,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:06,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:06,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:12:06,270 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1906497807, now seen corresponding path program 3 times [2020-10-13 05:12:06,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:06,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601798298] [2020-10-13 05:12:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:06,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:06,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 05:12:06,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:06,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-13 05:12:06,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:12:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:12:06,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:06,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:06,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:06,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:06,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:06,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:06,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:06,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601798298] [2020-10-13 05:12:06,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:06,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:12:06,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381597730] [2020-10-13 05:12:06,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:12:06,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:12:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:12:06,738 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2020-10-13 05:12:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:06,857 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-13 05:12:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:12:06,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 05:12:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:06,859 INFO L225 Difference]: With dead ends: 74 [2020-10-13 05:12:06,859 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:12:06,860 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 05:12:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:12:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-13 05:12:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:12:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-13 05:12:06,869 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 19 [2020-10-13 05:12:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:06,870 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-13 05:12:06,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:12:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-13 05:12:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:12:06,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:06,871 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:06,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:12:06,871 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:06,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1688831055, now seen corresponding path program 4 times [2020-10-13 05:12:06,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:06,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632132937] [2020-10-13 05:12:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:07,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:12:07,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:07,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-13 05:12:07,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:07,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:12:07,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:07,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:12:07,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:07,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:07,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:07,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:07,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:07,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:07,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632132937] [2020-10-13 05:12:07,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:07,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:12:07,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570697846] [2020-10-13 05:12:07,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:12:07,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:12:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:12:07,212 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 8 states. [2020-10-13 05:12:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:07,334 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-13 05:12:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:12:07,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-13 05:12:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:07,335 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:12:07,336 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:12:07,337 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 05:12:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:12:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-13 05:12:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:12:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-13 05:12:07,346 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2020-10-13 05:12:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:07,346 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-13 05:12:07,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:12:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-13 05:12:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:12:07,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:07,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:07,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:12:07,348 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash -648805843, now seen corresponding path program 5 times [2020-10-13 05:12:07,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:07,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978582862] [2020-10-13 05:12:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:07,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:12:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-13 05:12:07,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:12:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:12:07,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:07,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:07,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:07,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:07,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:07,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:07,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:07,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:07,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:07,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978582862] [2020-10-13 05:12:07,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:07,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:12:07,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118224156] [2020-10-13 05:12:07,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:12:07,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:12:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:12:07,809 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 9 states. [2020-10-13 05:12:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:07,988 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-13 05:12:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:12:07,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-13 05:12:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:07,990 INFO L225 Difference]: With dead ends: 98 [2020-10-13 05:12:07,990 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:12:07,991 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 05:12:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:12:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-13 05:12:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:12:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-13 05:12:08,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 23 [2020-10-13 05:12:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:08,000 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-13 05:12:08,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:12:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-13 05:12:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:12:08,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:08,002 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:08,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:12:08,003 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -849969013, now seen corresponding path program 6 times [2020-10-13 05:12:08,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:08,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472133243] [2020-10-13 05:12:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:08,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:12:08,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:08,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-13 05:12:08,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:12:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:12:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:08,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:08,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:08,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:08,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:08,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:08,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:08,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:08,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:08,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:08,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:08,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472133243] [2020-10-13 05:12:08,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:08,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:12:08,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941187607] [2020-10-13 05:12:08,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:12:08,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:12:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:12:08,642 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 10 states. [2020-10-13 05:12:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:08,862 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-13 05:12:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:12:08,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 05:12:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:08,864 INFO L225 Difference]: With dead ends: 110 [2020-10-13 05:12:08,864 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:12:08,865 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 05:12:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:12:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-13 05:12:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:12:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-13 05:12:08,873 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 25 [2020-10-13 05:12:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:08,873 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-13 05:12:08,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:12:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-13 05:12:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:12:08,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:08,875 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:08,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:12:08,875 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:08,875 INFO L82 PathProgramCache]: Analyzing trace with hash -894247063, now seen corresponding path program 7 times [2020-10-13 05:12:08,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:08,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667588034] [2020-10-13 05:12:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:10,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:10,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:12:10,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:10,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1395 [2020-10-13 05:12:10,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:12:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:12:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:10,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:10,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:10,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:10,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:10,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:10,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667588034] [2020-10-13 05:12:10,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:10,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:12:10,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280266596] [2020-10-13 05:12:10,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:12:10,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:12:10,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:12:10,368 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 11 states. [2020-10-13 05:12:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:10,555 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-13 05:12:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:12:10,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 05:12:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:10,556 INFO L225 Difference]: With dead ends: 122 [2020-10-13 05:12:10,556 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 05:12:10,557 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 05:12:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 05:12:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-13 05:12:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:12:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-13 05:12:10,566 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 27 [2020-10-13 05:12:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:10,566 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-13 05:12:10,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:12:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-13 05:12:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:12:10,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:10,567 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:10,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:12:10,568 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash -495780153, now seen corresponding path program 8 times [2020-10-13 05:12:10,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:10,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054201648] [2020-10-13 05:12:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:10,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:12:11,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:11,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-13 05:12:11,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:12:11,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:11,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:12:11,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:11,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:11,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:11,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:11,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:11,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:11,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054201648] [2020-10-13 05:12:11,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:11,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:12:11,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351903696] [2020-10-13 05:12:11,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:12:11,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:11,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:12:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:11,587 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 12 states. [2020-10-13 05:12:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:11,794 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-13 05:12:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:12:11,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 05:12:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:11,796 INFO L225 Difference]: With dead ends: 134 [2020-10-13 05:12:11,796 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 05:12:11,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 05:12:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-13 05:12:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:12:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-13 05:12:11,804 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 29 [2020-10-13 05:12:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:11,805 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-13 05:12:11,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:12:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-13 05:12:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:12:11,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:11,806 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:11,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:12:11,807 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash 178831013, now seen corresponding path program 9 times [2020-10-13 05:12:11,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:11,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618467852] [2020-10-13 05:12:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:12:12,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:12,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-13 05:12:12,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:12:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:12:12,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:12,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:12,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:12,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:12,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:12,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618467852] [2020-10-13 05:12:12,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:12,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:12:12,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617990397] [2020-10-13 05:12:12,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:12:12,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:12:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:12:12,857 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 13 states. [2020-10-13 05:12:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:13,119 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2020-10-13 05:12:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:12:13,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-13 05:12:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:13,121 INFO L225 Difference]: With dead ends: 146 [2020-10-13 05:12:13,121 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 05:12:13,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:12:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 05:12:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-13 05:12:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:12:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-10-13 05:12:13,130 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 31 [2020-10-13 05:12:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:13,130 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-10-13 05:12:13,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:12:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-10-13 05:12:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:12:13,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:13,131 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:13,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:12:13,132 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash -59900157, now seen corresponding path program 10 times [2020-10-13 05:12:13,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:13,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644791490] [2020-10-13 05:12:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:13,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:14,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:12:14,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:14,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-13 05:12:14,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:12:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:12:14,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:14,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:14,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:14,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:14,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:14,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:14,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:14,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644791490] [2020-10-13 05:12:14,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:14,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:12:14,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883582445] [2020-10-13 05:12:14,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:12:14,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:12:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:14,515 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 14 states. [2020-10-13 05:12:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:14,727 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2020-10-13 05:12:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:12:14,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-13 05:12:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:14,729 INFO L225 Difference]: With dead ends: 158 [2020-10-13 05:12:14,729 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 05:12:14,730 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 05:12:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 05:12:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-13 05:12:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 05:12:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2020-10-13 05:12:14,736 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 33 [2020-10-13 05:12:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:14,737 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2020-10-13 05:12:14,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:12:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2020-10-13 05:12:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:12:14,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:14,738 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:14,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:12:14,738 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1847287839, now seen corresponding path program 11 times [2020-10-13 05:12:14,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:14,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952324041] [2020-10-13 05:12:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:15,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:12:15,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:15,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-13 05:12:15,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:15,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:12:15,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:15,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:12:15,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:15,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:15,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:15,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:15,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:15,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:15,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952324041] [2020-10-13 05:12:15,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:15,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:12:15,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283571879] [2020-10-13 05:12:15,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:12:15,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:15,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:12:15,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:12:15,973 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 15 states. [2020-10-13 05:12:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:16,251 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-13 05:12:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:12:16,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-13 05:12:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:16,253 INFO L225 Difference]: With dead ends: 170 [2020-10-13 05:12:16,253 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 05:12:16,254 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 05:12:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 05:12:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 05:12:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 05:12:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-10-13 05:12:16,261 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 35 [2020-10-13 05:12:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:16,261 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-10-13 05:12:16,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:12:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-10-13 05:12:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:12:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:16,262 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:16,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:12:16,263 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1539931841, now seen corresponding path program 12 times [2020-10-13 05:12:16,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:16,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119004675] [2020-10-13 05:12:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:16,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:16,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:12:17,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-13 05:12:17,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:12:17,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:17,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:12:17,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:17,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:17,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:17,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:17,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:17,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119004675] [2020-10-13 05:12:17,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:17,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:12:17,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584270481] [2020-10-13 05:12:17,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:12:17,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:17,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:12:17,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:12:17,722 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 16 states. [2020-10-13 05:12:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:18,163 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2020-10-13 05:12:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:12:18,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 05:12:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:18,166 INFO L225 Difference]: With dead ends: 182 [2020-10-13 05:12:18,166 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 05:12:18,167 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 05:12:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 05:12:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-13 05:12:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 05:12:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2020-10-13 05:12:18,175 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 37 [2020-10-13 05:12:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:18,176 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2020-10-13 05:12:18,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:12:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2020-10-13 05:12:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:12:18,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:18,177 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:18,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:12:18,178 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1771406109, now seen corresponding path program 13 times [2020-10-13 05:12:18,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:18,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180080935] [2020-10-13 05:12:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:19,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:12:19,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:19,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-13 05:12:19,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:19,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:12:19,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:19,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:12:19,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:20,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:20,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:20,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:20,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:20,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:20,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:20,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:20,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:20,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:20,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180080935] [2020-10-13 05:12:20,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:20,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:12:20,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073606369] [2020-10-13 05:12:20,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:12:20,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:12:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:12:20,154 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 17 states. [2020-10-13 05:12:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:20,533 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2020-10-13 05:12:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:12:20,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-13 05:12:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:20,535 INFO L225 Difference]: With dead ends: 194 [2020-10-13 05:12:20,536 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 05:12:20,538 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 05:12:20,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 05:12:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-13 05:12:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 05:12:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2020-10-13 05:12:20,561 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 39 [2020-10-13 05:12:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:20,563 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2020-10-13 05:12:20,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:12:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2020-10-13 05:12:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:12:20,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:20,566 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:20,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:12:20,567 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1396409723, now seen corresponding path program 14 times [2020-10-13 05:12:20,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:20,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830578115] [2020-10-13 05:12:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:20,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:22,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:12:22,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:22,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-13 05:12:22,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:22,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:12:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:12:22,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:22,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:22,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:22,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:22,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:22,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:22,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:22,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:22,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830578115] [2020-10-13 05:12:22,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:22,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:12:22,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76000157] [2020-10-13 05:12:22,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:12:22,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:12:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:12:22,775 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 18 states. [2020-10-13 05:12:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:23,127 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2020-10-13 05:12:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:12:23,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-13 05:12:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:23,130 INFO L225 Difference]: With dead ends: 206 [2020-10-13 05:12:23,130 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:12:23,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:12:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:12:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-10-13 05:12:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 05:12:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2020-10-13 05:12:23,143 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 41 [2020-10-13 05:12:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:23,145 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2020-10-13 05:12:23,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:12:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2020-10-13 05:12:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:12:23,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:23,147 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:23,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:12:23,147 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1802135641, now seen corresponding path program 15 times [2020-10-13 05:12:23,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:23,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497104754] [2020-10-13 05:12:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:25,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:12:25,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:25,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1977 [2020-10-13 05:12:25,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:12:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:12:25,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:25,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:25,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497104754] [2020-10-13 05:12:25,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:25,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:12:25,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527868470] [2020-10-13 05:12:25,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:12:25,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:12:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:12:25,336 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 19 states. [2020-10-13 05:12:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:25,702 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2020-10-13 05:12:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:12:25,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-13 05:12:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:25,704 INFO L225 Difference]: With dead ends: 218 [2020-10-13 05:12:25,704 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 05:12:25,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:12:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 05:12:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-13 05:12:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 05:12:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2020-10-13 05:12:25,712 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 43 [2020-10-13 05:12:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:25,713 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2020-10-13 05:12:25,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:12:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2020-10-13 05:12:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:12:25,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:25,713 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:25,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:12:25,714 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:25,714 INFO L82 PathProgramCache]: Analyzing trace with hash 862718903, now seen corresponding path program 16 times [2020-10-13 05:12:25,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:25,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958966325] [2020-10-13 05:12:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:25,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:27,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:12:27,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-10-13 05:12:27,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:12:27,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:27,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:12:27,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:28,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:28,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:28,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:28,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:28,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:28,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958966325] [2020-10-13 05:12:28,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:28,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:12:28,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963194523] [2020-10-13 05:12:28,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:12:28,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:12:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:12:28,064 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 20 states. [2020-10-13 05:12:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:28,462 INFO L93 Difference]: Finished difference Result 230 states and 268 transitions. [2020-10-13 05:12:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:12:28,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-13 05:12:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:28,464 INFO L225 Difference]: With dead ends: 230 [2020-10-13 05:12:28,464 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:12:28,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:12:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:12:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-13 05:12:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 05:12:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2020-10-13 05:12:28,472 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 45 [2020-10-13 05:12:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:28,473 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2020-10-13 05:12:28,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:12:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2020-10-13 05:12:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:12:28,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:28,473 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:28,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:12:28,474 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 26365845, now seen corresponding path program 17 times [2020-10-13 05:12:28,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:28,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225777492] [2020-10-13 05:12:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:28,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:31,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:31,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:12:31,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:31,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2682 [2020-10-13 05:12:31,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:31,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:12:31,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:31,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:12:31,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:31,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:31,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:31,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:31,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:31,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:31,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:31,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:31,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:31,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225777492] [2020-10-13 05:12:31,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:12:31,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700848076] [2020-10-13 05:12:31,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:12:31,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:12:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:12:31,402 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 21 states. [2020-10-13 05:12:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:31,872 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2020-10-13 05:12:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:12:31,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-13 05:12:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:31,875 INFO L225 Difference]: With dead ends: 242 [2020-10-13 05:12:31,875 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 05:12:31,876 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 05:12:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 05:12:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-13 05:12:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 05:12:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2020-10-13 05:12:31,884 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 47 [2020-10-13 05:12:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:31,884 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2020-10-13 05:12:31,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:12:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2020-10-13 05:12:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:12:31,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:31,885 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:31,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:12:31,885 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -550038541, now seen corresponding path program 18 times [2020-10-13 05:12:31,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:31,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413658585] [2020-10-13 05:12:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:31,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:33,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:12:33,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:33,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1996 [2020-10-13 05:12:33,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:12:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:12:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:34,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:34,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:34,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:34,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413658585] [2020-10-13 05:12:34,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:34,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:12:34,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293123951] [2020-10-13 05:12:34,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:12:34,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:34,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:12:34,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:12:34,172 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand 22 states. [2020-10-13 05:12:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:34,648 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2020-10-13 05:12:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:12:34,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-13 05:12:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:34,651 INFO L225 Difference]: With dead ends: 254 [2020-10-13 05:12:34,651 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 05:12:34,655 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 05:12:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 05:12:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-10-13 05:12:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 05:12:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2020-10-13 05:12:34,663 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 49 [2020-10-13 05:12:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:34,663 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2020-10-13 05:12:34,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:12:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2020-10-13 05:12:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:12:34,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:34,664 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:34,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:12:34,664 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -423872303, now seen corresponding path program 19 times [2020-10-13 05:12:34,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:34,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418764428] [2020-10-13 05:12:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:34,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2564 [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:12:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:12:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:37,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:37,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:37,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418764428] [2020-10-13 05:12:37,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:37,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:12:37,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470806536] [2020-10-13 05:12:37,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:12:37,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:12:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:12:37,523 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 23 states. [2020-10-13 05:12:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:37,952 INFO L93 Difference]: Finished difference Result 266 states and 310 transitions. [2020-10-13 05:12:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:12:37,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 05:12:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:37,955 INFO L225 Difference]: With dead ends: 266 [2020-10-13 05:12:37,955 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 05:12:37,957 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 05:12:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 05:12:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-13 05:12:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 05:12:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2020-10-13 05:12:37,965 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 51 [2020-10-13 05:12:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:37,966 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2020-10-13 05:12:37,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:12:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2020-10-13 05:12:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:12:37,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:37,967 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:37,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:12:37,967 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash 562798127, now seen corresponding path program 20 times [2020-10-13 05:12:37,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:37,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902072165] [2020-10-13 05:12:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:37,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:38,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:40,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:12:40,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2408 [2020-10-13 05:12:40,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:12:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:12:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:40,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:40,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:40,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:40,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:40,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:40,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:40,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:40,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:40,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902072165] [2020-10-13 05:12:40,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:40,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:12:40,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138839398] [2020-10-13 05:12:40,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:12:40,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:12:40,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:12:40,734 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 24 states. [2020-10-13 05:12:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:41,183 INFO L93 Difference]: Finished difference Result 278 states and 324 transitions. [2020-10-13 05:12:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:12:41,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-13 05:12:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:41,187 INFO L225 Difference]: With dead ends: 278 [2020-10-13 05:12:41,187 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 05:12:41,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:12:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 05:12:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-13 05:12:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 05:12:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2020-10-13 05:12:41,208 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 53 [2020-10-13 05:12:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:41,208 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2020-10-13 05:12:41,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:12:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2020-10-13 05:12:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:12:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:41,209 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:41,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:12:41,212 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:41,213 INFO L82 PathProgramCache]: Analyzing trace with hash -434691059, now seen corresponding path program 21 times [2020-10-13 05:12:41,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:41,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788883701] [2020-10-13 05:12:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:41,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:44,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2861 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:12:44,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:44,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:44,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:44,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:44,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:44,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:44,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:44,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:44,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:44,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788883701] [2020-10-13 05:12:44,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:44,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:12:44,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450671581] [2020-10-13 05:12:44,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:12:44,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:44,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:12:44,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:12:44,519 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand 25 states. [2020-10-13 05:12:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:45,081 INFO L93 Difference]: Finished difference Result 290 states and 338 transitions. [2020-10-13 05:12:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:12:45,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-13 05:12:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:45,084 INFO L225 Difference]: With dead ends: 290 [2020-10-13 05:12:45,084 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 05:12:45,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:12:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 05:12:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-13 05:12:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 05:12:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2020-10-13 05:12:45,102 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 55 [2020-10-13 05:12:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:45,102 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2020-10-13 05:12:45,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:12:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2020-10-13 05:12:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:12:45,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:45,103 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:45,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:12:45,104 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1244091797, now seen corresponding path program 22 times [2020-10-13 05:12:45,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:45,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617620472] [2020-10-13 05:12:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:45,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:45,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:48,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:12:48,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3002 [2020-10-13 05:12:48,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:48,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:12:48,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:48,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:12:48,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:48,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:48,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:48,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:48,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617620472] [2020-10-13 05:12:48,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:48,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:12:48,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100856859] [2020-10-13 05:12:48,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:12:48,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:48,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:12:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:12:48,580 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 26 states. [2020-10-13 05:12:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:49,168 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2020-10-13 05:12:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:12:49,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-13 05:12:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:49,170 INFO L225 Difference]: With dead ends: 302 [2020-10-13 05:12:49,170 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 05:12:49,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:12:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 05:12:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-10-13 05:12:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-13 05:12:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2020-10-13 05:12:49,180 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 57 [2020-10-13 05:12:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:49,180 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2020-10-13 05:12:49,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:12:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2020-10-13 05:12:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:12:49,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:49,181 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:49,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:12:49,182 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:49,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1689120439, now seen corresponding path program 23 times [2020-10-13 05:12:49,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:49,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666723829] [2020-10-13 05:12:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:52,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:12:52,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:52,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3648 [2020-10-13 05:12:52,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:12:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:12:52,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:53,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:53,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:53,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:53,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:53,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:53,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:53,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:53,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:53,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:53,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:53,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666723829] [2020-10-13 05:12:53,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:53,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:12:53,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837287742] [2020-10-13 05:12:53,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:12:53,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:12:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:12:53,215 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand 27 states. [2020-10-13 05:12:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:53,709 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2020-10-13 05:12:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:12:53,709 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-13 05:12:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:53,710 INFO L225 Difference]: With dead ends: 314 [2020-10-13 05:12:53,710 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 05:12:53,712 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 05:12:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 05:12:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-10-13 05:12:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 05:12:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2020-10-13 05:12:53,721 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 59 [2020-10-13 05:12:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:53,721 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2020-10-13 05:12:53,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:12:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2020-10-13 05:12:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:12:53,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:53,722 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:53,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:12:53,722 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:53,722 INFO L82 PathProgramCache]: Analyzing trace with hash 135084199, now seen corresponding path program 24 times [2020-10-13 05:12:53,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:53,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266492097] [2020-10-13 05:12:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:53,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:57,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:57,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:12:57,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:57,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3502 [2020-10-13 05:12:57,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:12:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:12:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:57,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:57,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:57,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:57,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:57,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:57,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266492097] [2020-10-13 05:12:57,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:57,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:12:57,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122631327] [2020-10-13 05:12:57,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:12:57,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:12:57,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:12:57,650 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand 28 states. [2020-10-13 05:12:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:58,276 INFO L93 Difference]: Finished difference Result 326 states and 380 transitions. [2020-10-13 05:12:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:12:58,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-13 05:12:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:58,278 INFO L225 Difference]: With dead ends: 326 [2020-10-13 05:12:58,278 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 05:12:58,280 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 05:12:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 05:12:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2020-10-13 05:12:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 05:12:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2020-10-13 05:12:58,293 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 61 [2020-10-13 05:12:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:58,294 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2020-10-13 05:12:58,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:12:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2020-10-13 05:12:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:12:58,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:58,294 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:58,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:12:58,295 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash 849084549, now seen corresponding path program 25 times [2020-10-13 05:12:58,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:58,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532145956] [2020-10-13 05:12:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:58,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:02,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:02,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:13:02,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:02,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4363 [2020-10-13 05:13:02,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:02,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:13:02,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:02,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:13:02,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:03,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:03,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:03,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:03,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:03,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:03,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:03,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:03,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532145956] [2020-10-13 05:13:03,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:03,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:13:03,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786099976] [2020-10-13 05:13:03,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:13:03,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:13:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:13:03,095 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand 29 states. [2020-10-13 05:13:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:03,755 INFO L93 Difference]: Finished difference Result 338 states and 394 transitions. [2020-10-13 05:13:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:13:03,756 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-13 05:13:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:03,757 INFO L225 Difference]: With dead ends: 338 [2020-10-13 05:13:03,757 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 05:13:03,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:13:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 05:13:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-10-13 05:13:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 05:13:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2020-10-13 05:13:03,767 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 63 [2020-10-13 05:13:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:03,768 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2020-10-13 05:13:03,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:13:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2020-10-13 05:13:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:13:03,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:03,768 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:03,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:13:03,769 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash -191346461, now seen corresponding path program 26 times [2020-10-13 05:13:03,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:03,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106466968] [2020-10-13 05:13:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:03,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:07,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:07,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:13:07,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:07,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4189 [2020-10-13 05:13:07,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:07,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:13:07,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:07,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:13:07,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:08,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:08,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:08,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:08,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:08,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:08,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:08,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106466968] [2020-10-13 05:13:08,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:08,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:13:08,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116195967] [2020-10-13 05:13:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:13:08,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:13:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:13:08,431 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand 30 states. [2020-10-13 05:13:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:08,993 INFO L93 Difference]: Finished difference Result 350 states and 408 transitions. [2020-10-13 05:13:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:13:08,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-13 05:13:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:08,996 INFO L225 Difference]: With dead ends: 350 [2020-10-13 05:13:08,996 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 05:13:08,998 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 05:13:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 05:13:09,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 05:13:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 05:13:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 236 transitions. [2020-10-13 05:13:09,008 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 236 transitions. Word has length 65 [2020-10-13 05:13:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:09,008 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 236 transitions. [2020-10-13 05:13:09,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:13:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 236 transitions. [2020-10-13 05:13:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:13:09,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:09,009 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:09,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:13:09,009 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:09,010 INFO L82 PathProgramCache]: Analyzing trace with hash 681832897, now seen corresponding path program 27 times [2020-10-13 05:13:09,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:09,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984070472] [2020-10-13 05:13:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:09,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:09,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:14,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:14,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:13:14,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:14,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:13:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:13:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:14,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:14,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:14,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:14,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:14,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:14,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:14,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984070472] [2020-10-13 05:13:14,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:14,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:13:14,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513284040] [2020-10-13 05:13:14,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:13:14,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:13:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:13:14,516 INFO L87 Difference]: Start difference. First operand 207 states and 236 transitions. Second operand 31 states. [2020-10-13 05:13:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:15,360 INFO L93 Difference]: Finished difference Result 362 states and 422 transitions. [2020-10-13 05:13:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:13:15,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-13 05:13:15,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:15,363 INFO L225 Difference]: With dead ends: 362 [2020-10-13 05:13:15,363 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 05:13:15,367 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 05:13:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 05:13:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-13 05:13:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 05:13:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2020-10-13 05:13:15,385 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 67 [2020-10-13 05:13:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:15,388 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2020-10-13 05:13:15,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:13:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2020-10-13 05:13:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:13:15,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:15,390 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:15,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:13:15,390 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:15,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2006394081, now seen corresponding path program 28 times [2020-10-13 05:13:15,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:15,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107019586] [2020-10-13 05:13:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:15,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:13:20,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:20,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:20,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:20,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:20,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:20,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:20,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107019586] [2020-10-13 05:13:20,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:20,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:13:20,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686946998] [2020-10-13 05:13:20,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:13:20,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:20,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:13:20,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:13:20,937 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand 32 states. [2020-10-13 05:13:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:21,485 INFO L93 Difference]: Finished difference Result 374 states and 436 transitions. [2020-10-13 05:13:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:13:21,485 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-13 05:13:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:21,487 INFO L225 Difference]: With dead ends: 374 [2020-10-13 05:13:21,487 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 05:13:21,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:13:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 05:13:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-10-13 05:13:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 05:13:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 252 transitions. [2020-10-13 05:13:21,498 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 252 transitions. Word has length 69 [2020-10-13 05:13:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:21,499 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 252 transitions. [2020-10-13 05:13:21,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:13:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 252 transitions. [2020-10-13 05:13:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:13:21,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:21,500 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:21,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:13:21,500 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 177792253, now seen corresponding path program 29 times [2020-10-13 05:13:21,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:21,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000649209] [2020-10-13 05:13:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:21,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:26,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:13:26,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:27,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:27,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:27,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:27,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:27,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:27,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:27,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:27,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:27,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:27,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:27,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000649209] [2020-10-13 05:13:27,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:27,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:13:27,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399937601] [2020-10-13 05:13:27,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:13:27,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:13:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:13:27,064 INFO L87 Difference]: Start difference. First operand 221 states and 252 transitions. Second operand 33 states. [2020-10-13 05:13:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:27,752 INFO L93 Difference]: Finished difference Result 386 states and 450 transitions. [2020-10-13 05:13:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:13:27,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-13 05:13:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:27,754 INFO L225 Difference]: With dead ends: 386 [2020-10-13 05:13:27,754 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 05:13:27,755 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 05:13:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 05:13:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2020-10-13 05:13:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 05:13:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2020-10-13 05:13:27,764 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 71 [2020-10-13 05:13:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:27,764 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2020-10-13 05:13:27,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:13:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2020-10-13 05:13:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:13:27,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:27,765 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:27,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:13:27,766 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:27,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1058148517, now seen corresponding path program 30 times [2020-10-13 05:13:27,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:27,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360004488] [2020-10-13 05:13:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:32,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:13:32,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:13:32,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:13:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:13:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:33,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:33,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:33,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:33,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:33,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:33,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:33,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:33,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:33,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:33,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360004488] [2020-10-13 05:13:33,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:33,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:13:33,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037010939] [2020-10-13 05:13:33,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:13:33,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:33,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:13:33,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:13:33,357 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 34 states. [2020-10-13 05:13:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:34,116 INFO L93 Difference]: Finished difference Result 398 states and 464 transitions. [2020-10-13 05:13:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:13:34,117 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-13 05:13:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:34,119 INFO L225 Difference]: With dead ends: 398 [2020-10-13 05:13:34,120 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 05:13:34,121 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 05:13:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 05:13:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2020-10-13 05:13:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-13 05:13:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 268 transitions. [2020-10-13 05:13:34,134 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 268 transitions. Word has length 73 [2020-10-13 05:13:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:34,134 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 268 transitions. [2020-10-13 05:13:34,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:13:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 268 transitions. [2020-10-13 05:13:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:13:34,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:34,136 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:34,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:13:34,136 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 908712505, now seen corresponding path program 31 times [2020-10-13 05:13:34,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:34,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682430227] [2020-10-13 05:13:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:13:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:13:39,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:39,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:39,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:39,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682430227] [2020-10-13 05:13:39,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:39,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:13:39,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528843547] [2020-10-13 05:13:39,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:13:39,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:39,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:13:39,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:13:39,778 INFO L87 Difference]: Start difference. First operand 235 states and 268 transitions. Second operand 35 states. [2020-10-13 05:13:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:40,609 INFO L93 Difference]: Finished difference Result 410 states and 478 transitions. [2020-10-13 05:13:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:13:40,609 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-13 05:13:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:40,611 INFO L225 Difference]: With dead ends: 410 [2020-10-13 05:13:40,611 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 05:13:40,613 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 05:13:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 05:13:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2020-10-13 05:13:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 05:13:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 276 transitions. [2020-10-13 05:13:40,624 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 276 transitions. Word has length 75 [2020-10-13 05:13:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:40,624 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 276 transitions. [2020-10-13 05:13:40,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:13:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 276 transitions. [2020-10-13 05:13:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:13:40,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:40,625 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:40,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:13:40,625 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1276544407, now seen corresponding path program 32 times [2020-10-13 05:13:40,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:40,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350482753] [2020-10-13 05:13:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:40,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:45,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:45,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:13:45,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:45,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 05:13:45,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:45,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:13:45,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:45,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 05:13:45,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:47,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:47,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:47,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:47,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:47,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:13:47,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:47,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 05:13:47,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350482753] [2020-10-13 05:13:47,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:47,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:13:47,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219716986] [2020-10-13 05:13:47,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:13:47,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:13:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:13:47,092 INFO L87 Difference]: Start difference. First operand 242 states and 276 transitions. Second operand 9 states. [2020-10-13 05:13:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:47,293 INFO L93 Difference]: Finished difference Result 248 states and 281 transitions. [2020-10-13 05:13:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:13:47,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-13 05:13:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:47,295 INFO L225 Difference]: With dead ends: 248 [2020-10-13 05:13:47,296 INFO L226 Difference]: Without dead ends: 246 [2020-10-13 05:13:47,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:13:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-13 05:13:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-10-13 05:13:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-13 05:13:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 279 transitions. [2020-10-13 05:13:47,322 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 279 transitions. Word has length 77 [2020-10-13 05:13:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:47,322 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 279 transitions. [2020-10-13 05:13:47,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:13:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 279 transitions. [2020-10-13 05:13:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:13:47,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:47,324 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:47,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:13:47,324 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 293054640, now seen corresponding path program 1 times [2020-10-13 05:13:47,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:47,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133977830] [2020-10-13 05:13:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:48,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 05:13:48,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-13 05:13:48,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:13:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:13:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:48,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:48,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:48,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:48,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:48,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:48,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:48,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 05:13:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:48,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:48,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:48,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:13:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:13:48,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133977830] [2020-10-13 05:13:48,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:48,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:13:48,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242206915] [2020-10-13 05:13:48,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:13:48,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:48,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:13:48,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:13:48,888 INFO L87 Difference]: Start difference. First operand 246 states and 279 transitions. Second operand 36 states. [2020-10-13 05:13:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:49,619 INFO L93 Difference]: Finished difference Result 430 states and 498 transitions. [2020-10-13 05:13:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:13:49,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-10-13 05:13:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:49,622 INFO L225 Difference]: With dead ends: 430 [2020-10-13 05:13:49,622 INFO L226 Difference]: Without dead ends: 255 [2020-10-13 05:13:49,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 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 05:13:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-13 05:13:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2020-10-13 05:13:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-13 05:13:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 287 transitions. [2020-10-13 05:13:49,635 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 287 transitions. Word has length 86 [2020-10-13 05:13:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:49,636 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 287 transitions. [2020-10-13 05:13:49,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:13:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 287 transitions. [2020-10-13 05:13:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 05:13:49,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:49,637 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:49,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:13:49,637 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash -860039534, now seen corresponding path program 2 times [2020-10-13 05:13:49,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:49,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774739040] [2020-10-13 05:13:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:49,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:50,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:50,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 05:13:50,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:50,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-13 05:13:50,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:50,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:13:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:13:50,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:51,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:51,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:51,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:51,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:51,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:51,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:51,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:51,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:51,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:51,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:51,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:51,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 05:13:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:51,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:51,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:51,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:51,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:51,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:51,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:13:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:13:51,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774739040] [2020-10-13 05:13:51,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:51,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:13:51,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789328991] [2020-10-13 05:13:51,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:13:51,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:51,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:13:51,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:13:51,274 INFO L87 Difference]: Start difference. First operand 253 states and 287 transitions. Second operand 37 states. [2020-10-13 05:13:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:52,102 INFO L93 Difference]: Finished difference Result 442 states and 512 transitions. [2020-10-13 05:13:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:13:52,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-10-13 05:13:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:52,105 INFO L225 Difference]: With dead ends: 442 [2020-10-13 05:13:52,105 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 05:13:52,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 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 05:13:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 05:13:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-10-13 05:13:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 05:13:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 295 transitions. [2020-10-13 05:13:52,118 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 295 transitions. Word has length 88 [2020-10-13 05:13:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:52,119 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 295 transitions. [2020-10-13 05:13:52,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:13:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 295 transitions. [2020-10-13 05:13:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:13:52,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:52,120 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:52,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:13:52,120 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash -881978380, now seen corresponding path program 3 times [2020-10-13 05:13:52,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:52,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369675402] [2020-10-13 05:13:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:52,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:52,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:13:52,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:53,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:53,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:53,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:53,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:53,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:53,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:53,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:53,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 05:13:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:53,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:53,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:53,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:53,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:13:53,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:53,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:13:53,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369675402] [2020-10-13 05:13:53,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:53,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:13:53,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083812278] [2020-10-13 05:13:53,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:13:53,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:53,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:13:53,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:13:53,394 INFO L87 Difference]: Start difference. First operand 260 states and 295 transitions. Second operand 38 states. [2020-10-13 05:13:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:54,221 INFO L93 Difference]: Finished difference Result 454 states and 526 transitions. [2020-10-13 05:13:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:13:54,222 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-10-13 05:13:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:54,227 INFO L225 Difference]: With dead ends: 454 [2020-10-13 05:13:54,227 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 05:13:54,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 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 05:13:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 05:13:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2020-10-13 05:13:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-13 05:13:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 303 transitions. [2020-10-13 05:13:54,239 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 303 transitions. Word has length 90 [2020-10-13 05:13:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:54,240 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 303 transitions. [2020-10-13 05:13:54,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:13:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 303 transitions. [2020-10-13 05:13:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 05:13:54,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:54,241 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:54,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:13:54,241 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash -490372906, now seen corresponding path program 4 times [2020-10-13 05:13:54,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:54,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060648237] [2020-10-13 05:13:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:54,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:13:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:55,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:55,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:55,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:55,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:55,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:55,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:55,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:55,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:55,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:55,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:55,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:55,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 05:13:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:55,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:55,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:55,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:55,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:55,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:55,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:13:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:55,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:13:55,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060648237] [2020-10-13 05:13:55,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:55,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:13:55,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636647962] [2020-10-13 05:13:55,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:13:55,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:55,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:13:55,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:13:55,612 INFO L87 Difference]: Start difference. First operand 267 states and 303 transitions. Second operand 39 states. [2020-10-13 05:13:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:56,667 INFO L93 Difference]: Finished difference Result 466 states and 540 transitions. [2020-10-13 05:13:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:13:56,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-10-13 05:13:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:56,670 INFO L225 Difference]: With dead ends: 466 [2020-10-13 05:13:56,671 INFO L226 Difference]: Without dead ends: 276 [2020-10-13 05:13:56,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:13:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-13 05:13:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 274. [2020-10-13 05:13:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-13 05:13:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2020-10-13 05:13:56,687 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 92 [2020-10-13 05:13:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:56,687 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2020-10-13 05:13:56,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:13:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2020-10-13 05:13:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 05:13:56,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:56,689 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:56,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:13:56,690 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2114634440, now seen corresponding path program 5 times [2020-10-13 05:13:56,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:56,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567797100] [2020-10-13 05:13:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:57,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 05:13:57,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:58,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:58,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:58,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:58,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:58,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:58,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:58,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:58,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:58,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:58,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 05:13:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:58,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:58,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:58,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:58,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:58,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:58,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:58,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:58,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:13:58,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:58,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:13:58,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567797100] [2020-10-13 05:13:58,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:58,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:13:58,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046207885] [2020-10-13 05:13:58,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:13:58,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:58,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:13:58,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:13:58,073 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand 40 states. [2020-10-13 05:13:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:59,048 INFO L93 Difference]: Finished difference Result 478 states and 554 transitions. [2020-10-13 05:13:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:13:59,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-10-13 05:13:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:59,051 INFO L225 Difference]: With dead ends: 478 [2020-10-13 05:13:59,051 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 05:13:59,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 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 05:13:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 05:13:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2020-10-13 05:13:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-13 05:13:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 319 transitions. [2020-10-13 05:13:59,062 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 319 transitions. Word has length 94 [2020-10-13 05:13:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:59,063 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 319 transitions. [2020-10-13 05:13:59,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:13:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 319 transitions. [2020-10-13 05:13:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 05:13:59,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:59,064 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:59,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:13:59,064 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash 338127130, now seen corresponding path program 6 times [2020-10-13 05:13:59,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:59,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226410999] [2020-10-13 05:13:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:59,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 05:13:59,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:00,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:00,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:00,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:00,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:00,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:00,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:00,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:00,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:00,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:00,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:00,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 05:14:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:00,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:00,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:00,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:00,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226410999] [2020-10-13 05:14:00,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:00,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:14:00,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559946977] [2020-10-13 05:14:00,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:14:00,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:14:00,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:14:00,488 INFO L87 Difference]: Start difference. First operand 281 states and 319 transitions. Second operand 41 states. [2020-10-13 05:14:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:01,571 INFO L93 Difference]: Finished difference Result 490 states and 568 transitions. [2020-10-13 05:14:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:14:01,572 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-10-13 05:14:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:01,573 INFO L225 Difference]: With dead ends: 490 [2020-10-13 05:14:01,574 INFO L226 Difference]: Without dead ends: 290 [2020-10-13 05:14:01,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:14:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-13 05:14:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2020-10-13 05:14:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-13 05:14:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2020-10-13 05:14:01,586 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 96 [2020-10-13 05:14:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:01,587 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2020-10-13 05:14:01,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:14:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2020-10-13 05:14:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 05:14:01,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:01,588 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:01,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:14:01,589 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:01,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash -495049604, now seen corresponding path program 7 times [2020-10-13 05:14:01,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:01,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453367106] [2020-10-13 05:14:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:02,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:02,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:14:02,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:03,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:03,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:03,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:03,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:03,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:03,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:03,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:03,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:03,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:03,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 05:14:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:03,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:03,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:03,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:03,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:03,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:03,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:03,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:03,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453367106] [2020-10-13 05:14:03,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:03,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:14:03,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837473067] [2020-10-13 05:14:03,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:14:03,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:14:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:14:03,061 INFO L87 Difference]: Start difference. First operand 288 states and 327 transitions. Second operand 42 states. [2020-10-13 05:14:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:04,235 INFO L93 Difference]: Finished difference Result 502 states and 582 transitions. [2020-10-13 05:14:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:14:04,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-10-13 05:14:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:04,238 INFO L225 Difference]: With dead ends: 502 [2020-10-13 05:14:04,238 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 05:14:04,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:14:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 05:14:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2020-10-13 05:14:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-13 05:14:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 335 transitions. [2020-10-13 05:14:04,250 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 335 transitions. Word has length 98 [2020-10-13 05:14:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:04,251 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 335 transitions. [2020-10-13 05:14:04,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:14:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 335 transitions. [2020-10-13 05:14:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 05:14:04,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:04,252 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:04,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:14:04,252 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1980993374, now seen corresponding path program 8 times [2020-10-13 05:14:04,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:04,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825479359] [2020-10-13 05:14:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:04,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:04,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 05:14:04,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:05,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:05,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:05,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:05,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:05,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:05,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:05,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:05,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:05,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:05,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:05,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:05,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 05:14:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:05,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:05,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:05,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:05,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:05,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:05,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825479359] [2020-10-13 05:14:05,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:05,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:14:05,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246129252] [2020-10-13 05:14:05,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:14:05,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:05,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:14:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:14:05,841 INFO L87 Difference]: Start difference. First operand 295 states and 335 transitions. Second operand 43 states. [2020-10-13 05:14:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:06,935 INFO L93 Difference]: Finished difference Result 514 states and 596 transitions. [2020-10-13 05:14:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:14:06,935 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-10-13 05:14:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:06,938 INFO L225 Difference]: With dead ends: 514 [2020-10-13 05:14:06,938 INFO L226 Difference]: Without dead ends: 304 [2020-10-13 05:14:06,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:14:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-13 05:14:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2020-10-13 05:14:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-13 05:14:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 343 transitions. [2020-10-13 05:14:06,949 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 343 transitions. Word has length 100 [2020-10-13 05:14:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:06,950 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 343 transitions. [2020-10-13 05:14:06,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:14:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 343 transitions. [2020-10-13 05:14:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 05:14:06,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:06,951 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:06,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:14:06,951 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2046413248, now seen corresponding path program 9 times [2020-10-13 05:14:06,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:06,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035796283] [2020-10-13 05:14:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:06,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:07,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 05:14:07,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:08,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 05:14:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:08,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:08,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:08,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035796283] [2020-10-13 05:14:08,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:08,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:14:08,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543756449] [2020-10-13 05:14:08,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:14:08,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:08,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:14:08,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:14:08,540 INFO L87 Difference]: Start difference. First operand 302 states and 343 transitions. Second operand 44 states. [2020-10-13 05:14:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:09,816 INFO L93 Difference]: Finished difference Result 526 states and 610 transitions. [2020-10-13 05:14:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:14:09,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 102 [2020-10-13 05:14:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:09,819 INFO L225 Difference]: With dead ends: 526 [2020-10-13 05:14:09,819 INFO L226 Difference]: Without dead ends: 311 [2020-10-13 05:14:09,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:14:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-13 05:14:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2020-10-13 05:14:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-13 05:14:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 351 transitions. [2020-10-13 05:14:09,833 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 351 transitions. Word has length 102 [2020-10-13 05:14:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:09,834 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 351 transitions. [2020-10-13 05:14:09,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:14:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 351 transitions. [2020-10-13 05:14:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 05:14:09,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:09,835 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:09,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:14:09,836 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:09,836 INFO L82 PathProgramCache]: Analyzing trace with hash 490402722, now seen corresponding path program 10 times [2020-10-13 05:14:09,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:09,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466272444] [2020-10-13 05:14:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 642 [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:14:10,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 05:14:10,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:11,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:11,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:11,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:11,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:11,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:11,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:11,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:11,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-13 05:14:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:11,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:11,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:11,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:11,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466272444] [2020-10-13 05:14:11,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:11,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:14:11,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124817460] [2020-10-13 05:14:11,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:14:11,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:11,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:14:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:14:11,552 INFO L87 Difference]: Start difference. First operand 309 states and 351 transitions. Second operand 45 states. [2020-10-13 05:14:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:12,567 INFO L93 Difference]: Finished difference Result 538 states and 624 transitions. [2020-10-13 05:14:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:14:12,567 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 104 [2020-10-13 05:14:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:12,570 INFO L225 Difference]: With dead ends: 538 [2020-10-13 05:14:12,571 INFO L226 Difference]: Without dead ends: 318 [2020-10-13 05:14:12,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:14:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-13 05:14:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2020-10-13 05:14:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-13 05:14:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 359 transitions. [2020-10-13 05:14:12,583 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 359 transitions. Word has length 104 [2020-10-13 05:14:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:12,584 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 359 transitions. [2020-10-13 05:14:12,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:14:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 359 transitions. [2020-10-13 05:14:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 05:14:12,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:12,585 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:12,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:14:12,585 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash -187093756, now seen corresponding path program 11 times [2020-10-13 05:14:12,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:12,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851831440] [2020-10-13 05:14:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:12,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:13,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 05:14:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:14,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:14,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:14,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:14,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:14,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:14,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:14,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:14,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-13 05:14:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:14,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:14,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:14,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:14,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:14,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:14,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:14,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:14,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851831440] [2020-10-13 05:14:14,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:14:14,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123615122] [2020-10-13 05:14:14,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:14:14,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:14:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:14:14,565 INFO L87 Difference]: Start difference. First operand 316 states and 359 transitions. Second operand 46 states. [2020-10-13 05:14:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:15,920 INFO L93 Difference]: Finished difference Result 550 states and 638 transitions. [2020-10-13 05:14:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:14:15,925 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2020-10-13 05:14:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:15,927 INFO L225 Difference]: With dead ends: 550 [2020-10-13 05:14:15,928 INFO L226 Difference]: Without dead ends: 325 [2020-10-13 05:14:15,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:14:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-13 05:14:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2020-10-13 05:14:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-13 05:14:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 367 transitions. [2020-10-13 05:14:15,939 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 367 transitions. Word has length 106 [2020-10-13 05:14:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:15,939 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 367 transitions. [2020-10-13 05:14:15,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:14:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 367 transitions. [2020-10-13 05:14:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 05:14:15,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:15,940 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:15,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:14:15,941 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1573819878, now seen corresponding path program 12 times [2020-10-13 05:14:15,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:15,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760277310] [2020-10-13 05:14:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:15,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:16,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:16,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:14:16,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:16,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-13 05:14:16,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:16,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:14:16,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:16,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 05:14:16,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:17,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:17,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:17,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:17,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:17,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:17,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:17,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:17,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:17,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 05:14:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:17,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:17,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:17,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:17,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:17,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:17,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:17,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:17,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:17,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 2 proven. 1849 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:17,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760277310] [2020-10-13 05:14:17,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:17,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:14:17,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580432283] [2020-10-13 05:14:17,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:14:17,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:14:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:14:17,775 INFO L87 Difference]: Start difference. First operand 323 states and 367 transitions. Second operand 47 states. [2020-10-13 05:14:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:18,990 INFO L93 Difference]: Finished difference Result 562 states and 652 transitions. [2020-10-13 05:14:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:14:18,990 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 108 [2020-10-13 05:14:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:18,993 INFO L225 Difference]: With dead ends: 562 [2020-10-13 05:14:18,993 INFO L226 Difference]: Without dead ends: 332 [2020-10-13 05:14:18,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:14:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-13 05:14:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2020-10-13 05:14:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-13 05:14:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 375 transitions. [2020-10-13 05:14:19,013 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 375 transitions. Word has length 108 [2020-10-13 05:14:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:19,014 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 375 transitions. [2020-10-13 05:14:19,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:14:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 375 transitions. [2020-10-13 05:14:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:14:19,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:19,017 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:19,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:14:19,020 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1594707528, now seen corresponding path program 13 times [2020-10-13 05:14:19,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:19,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79188781] [2020-10-13 05:14:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:19,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:19,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:19,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 05:14:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:20,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:20,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:20,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:20,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:20,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-13 05:14:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:20,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:20,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:20,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:20,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:20,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:20,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 1936 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:20,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79188781] [2020-10-13 05:14:20,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:20,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 05:14:20,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514921666] [2020-10-13 05:14:20,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 05:14:20,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:20,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 05:14:20,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:14:20,985 INFO L87 Difference]: Start difference. First operand 330 states and 375 transitions. Second operand 48 states. [2020-10-13 05:14:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:22,379 INFO L93 Difference]: Finished difference Result 574 states and 666 transitions. [2020-10-13 05:14:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 05:14:22,380 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 110 [2020-10-13 05:14:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:22,381 INFO L225 Difference]: With dead ends: 574 [2020-10-13 05:14:22,382 INFO L226 Difference]: Without dead ends: 339 [2020-10-13 05:14:22,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:14:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-13 05:14:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2020-10-13 05:14:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-13 05:14:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 383 transitions. [2020-10-13 05:14:22,394 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 383 transitions. Word has length 110 [2020-10-13 05:14:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:22,394 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 383 transitions. [2020-10-13 05:14:22,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 05:14:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 383 transitions. [2020-10-13 05:14:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 05:14:22,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:22,395 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:22,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 05:14:22,396 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 192902698, now seen corresponding path program 14 times [2020-10-13 05:14:22,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:22,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933092673] [2020-10-13 05:14:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:22,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:23,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:23,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 05:14:23,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:23,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-13 05:14:23,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 05:14:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 05:14:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:24,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:24,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:24,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:24,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:24,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:24,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-13 05:14:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:24,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:24,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:24,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:24,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:24,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933092673] [2020-10-13 05:14:24,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:24,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 05:14:24,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047064629] [2020-10-13 05:14:24,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 05:14:24,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 05:14:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:14:24,670 INFO L87 Difference]: Start difference. First operand 337 states and 383 transitions. Second operand 49 states. [2020-10-13 05:14:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:26,246 INFO L93 Difference]: Finished difference Result 586 states and 680 transitions. [2020-10-13 05:14:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 05:14:26,246 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 112 [2020-10-13 05:14:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:26,248 INFO L225 Difference]: With dead ends: 586 [2020-10-13 05:14:26,248 INFO L226 Difference]: Without dead ends: 346 [2020-10-13 05:14:26,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:14:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-13 05:14:26,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2020-10-13 05:14:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-13 05:14:26,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 391 transitions. [2020-10-13 05:14:26,260 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 391 transitions. Word has length 112 [2020-10-13 05:14:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:26,261 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 391 transitions. [2020-10-13 05:14:26,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 05:14:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 391 transitions. [2020-10-13 05:14:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 05:14:26,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:26,262 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:26,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 05:14:26,262 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1678192012, now seen corresponding path program 15 times [2020-10-13 05:14:26,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:26,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991309646] [2020-10-13 05:14:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:26,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:27,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:27,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:14:27,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-10-13 05:14:27,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:14:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 05:14:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:28,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:28,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:28,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-13 05:14:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:28,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:28,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:28,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:28,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:28,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:28,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:28,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:28,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:28,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:28,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:28,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991309646] [2020-10-13 05:14:28,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:28,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 05:14:28,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582697537] [2020-10-13 05:14:28,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 05:14:28,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 05:14:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:14:28,600 INFO L87 Difference]: Start difference. First operand 344 states and 391 transitions. Second operand 50 states. [2020-10-13 05:14:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:29,807 INFO L93 Difference]: Finished difference Result 598 states and 694 transitions. [2020-10-13 05:14:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:14:29,808 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 114 [2020-10-13 05:14:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:29,811 INFO L225 Difference]: With dead ends: 598 [2020-10-13 05:14:29,811 INFO L226 Difference]: Without dead ends: 353 [2020-10-13 05:14:29,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:14:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-13 05:14:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2020-10-13 05:14:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-13 05:14:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 399 transitions. [2020-10-13 05:14:29,824 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 399 transitions. Word has length 114 [2020-10-13 05:14:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:29,824 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 399 transitions. [2020-10-13 05:14:29,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 05:14:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 399 transitions. [2020-10-13 05:14:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:14:29,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:29,826 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:29,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 05:14:29,826 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:29,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1182886802, now seen corresponding path program 16 times [2020-10-13 05:14:29,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:29,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116907183] [2020-10-13 05:14:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:29,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 05:14:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:30,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 05:14:30,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:32,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:32,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:32,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:32,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:32,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:32,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:14:32,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:32,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:32,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:32,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:32,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:32,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-13 05:14:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:32,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:32,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:32,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:32,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:32,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:32,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116907183] [2020-10-13 05:14:32,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:32,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 05:14:32,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98040929] [2020-10-13 05:14:32,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 05:14:32,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 05:14:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:14:32,194 INFO L87 Difference]: Start difference. First operand 351 states and 399 transitions. Second operand 51 states. [2020-10-13 05:14:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:33,811 INFO L93 Difference]: Finished difference Result 610 states and 708 transitions. [2020-10-13 05:14:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 05:14:33,812 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 116 [2020-10-13 05:14:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:33,813 INFO L225 Difference]: With dead ends: 610 [2020-10-13 05:14:33,814 INFO L226 Difference]: Without dead ends: 360 [2020-10-13 05:14:33,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:14:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-13 05:14:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 358. [2020-10-13 05:14:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 05:14:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 407 transitions. [2020-10-13 05:14:33,824 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 407 transitions. Word has length 116 [2020-10-13 05:14:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:33,824 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 407 transitions. [2020-10-13 05:14:33,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 05:14:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 407 transitions. [2020-10-13 05:14:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 05:14:33,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:33,825 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:33,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 05:14:33,826 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1900557616, now seen corresponding path program 17 times [2020-10-13 05:14:33,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:33,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685866661] [2020-10-13 05:14:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:33,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:34,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:34,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 05:14:34,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-13 05:14:34,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 05:14:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 05:14:34,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:36,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:36,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:36,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:36,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:36,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:36,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:36,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-13 05:14:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:36,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:36,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:36,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:36,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:36,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:36,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:36,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:36,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:36,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:36,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685866661] [2020-10-13 05:14:36,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:36,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 05:14:36,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882445910] [2020-10-13 05:14:36,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 05:14:36,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 05:14:36,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:14:36,231 INFO L87 Difference]: Start difference. First operand 358 states and 407 transitions. Second operand 52 states. [2020-10-13 05:14:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:37,919 INFO L93 Difference]: Finished difference Result 622 states and 722 transitions. [2020-10-13 05:14:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:14:37,920 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 118 [2020-10-13 05:14:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:37,922 INFO L225 Difference]: With dead ends: 622 [2020-10-13 05:14:37,922 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 05:14:37,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:14:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 05:14:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2020-10-13 05:14:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-13 05:14:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2020-10-13 05:14:37,933 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 118 [2020-10-13 05:14:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:37,933 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2020-10-13 05:14:37,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 05:14:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2020-10-13 05:14:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 05:14:37,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:37,934 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:37,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 05:14:37,935 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash -92475214, now seen corresponding path program 18 times [2020-10-13 05:14:37,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:37,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366878192] [2020-10-13 05:14:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:37,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:39,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:39,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 05:14:39,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-13 05:14:39,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:14:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 05:14:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:40,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:40,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:40,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:40,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:40,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:40,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:40,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:40,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:40,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-13 05:14:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:40,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:40,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:40,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:40,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:40,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:40,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:40,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:40,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:40,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:40,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 2401 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:40,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366878192] [2020-10-13 05:14:40,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:40,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:14:40,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130911476] [2020-10-13 05:14:40,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:14:40,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:14:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:14:40,465 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand 53 states. [2020-10-13 05:14:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:41,796 INFO L93 Difference]: Finished difference Result 634 states and 736 transitions. [2020-10-13 05:14:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 05:14:41,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 120 [2020-10-13 05:14:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:41,800 INFO L225 Difference]: With dead ends: 634 [2020-10-13 05:14:41,800 INFO L226 Difference]: Without dead ends: 374 [2020-10-13 05:14:41,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:14:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-13 05:14:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 372. [2020-10-13 05:14:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-13 05:14:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 423 transitions. [2020-10-13 05:14:41,811 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 423 transitions. Word has length 120 [2020-10-13 05:14:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:41,812 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 423 transitions. [2020-10-13 05:14:41,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 05:14:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 423 transitions. [2020-10-13 05:14:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 05:14:41,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:41,813 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:41,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 05:14:41,813 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:41,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1987041772, now seen corresponding path program 19 times [2020-10-13 05:14:41,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:41,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270033946] [2020-10-13 05:14:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:43,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 05:14:43,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:44,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:44,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:44,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:44,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:44,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:44,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:44,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:44,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:44,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:44,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:44,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:44,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-13 05:14:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:44,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:44,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:44,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:45,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270033946] [2020-10-13 05:14:45,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:45,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 05:14:45,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897712322] [2020-10-13 05:14:45,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 05:14:45,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 05:14:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:14:45,012 INFO L87 Difference]: Start difference. First operand 372 states and 423 transitions. Second operand 54 states. [2020-10-13 05:14:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:46,832 INFO L93 Difference]: Finished difference Result 646 states and 750 transitions. [2020-10-13 05:14:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:14:46,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 122 [2020-10-13 05:14:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:46,834 INFO L225 Difference]: With dead ends: 646 [2020-10-13 05:14:46,834 INFO L226 Difference]: Without dead ends: 381 [2020-10-13 05:14:46,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:14:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-13 05:14:46,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2020-10-13 05:14:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-13 05:14:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 431 transitions. [2020-10-13 05:14:46,844 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 431 transitions. Word has length 122 [2020-10-13 05:14:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:46,845 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 431 transitions. [2020-10-13 05:14:46,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 05:14:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 431 transitions. [2020-10-13 05:14:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 05:14:46,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:46,846 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:46,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 05:14:46,846 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1599370506, now seen corresponding path program 20 times [2020-10-13 05:14:46,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:46,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238371905] [2020-10-13 05:14:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:48,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:48,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:14:48,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-13 05:14:48,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 05:14:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 05:14:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:49,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:49,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:49,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:49,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:49,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:49,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:49,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-13 05:14:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:49,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:49,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:49,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:49,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:49,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:49,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:49,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:49,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:49,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:49,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 2 proven. 2601 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:49,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238371905] [2020-10-13 05:14:49,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:49,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 05:14:49,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079312520] [2020-10-13 05:14:49,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 05:14:49,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 05:14:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:14:49,956 INFO L87 Difference]: Start difference. First operand 379 states and 431 transitions. Second operand 55 states. [2020-10-13 05:14:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:51,852 INFO L93 Difference]: Finished difference Result 658 states and 764 transitions. [2020-10-13 05:14:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 05:14:51,853 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 124 [2020-10-13 05:14:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:51,855 INFO L225 Difference]: With dead ends: 658 [2020-10-13 05:14:51,855 INFO L226 Difference]: Without dead ends: 388 [2020-10-13 05:14:51,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:14:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-13 05:14:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 386. [2020-10-13 05:14:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-13 05:14:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 439 transitions. [2020-10-13 05:14:51,865 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 439 transitions. Word has length 124 [2020-10-13 05:14:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:51,865 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 439 transitions. [2020-10-13 05:14:51,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 05:14:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 439 transitions. [2020-10-13 05:14:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:14:51,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:51,866 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:51,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 05:14:51,866 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1585528664, now seen corresponding path program 21 times [2020-10-13 05:14:51,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:51,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585878000] [2020-10-13 05:14:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:51,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:53,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:53,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 05:14:53,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:53,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1408 [2020-10-13 05:14:53,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 05:14:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 05:14:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:54,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:54,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:54,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:54,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:54,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:54,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:54,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:54,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-13 05:14:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:54,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:54,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:54,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:54,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2708 backedges. 2 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:14:54,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585878000] [2020-10-13 05:14:54,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:54,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 05:14:54,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235028457] [2020-10-13 05:14:54,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 05:14:54,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 05:14:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:14:54,984 INFO L87 Difference]: Start difference. First operand 386 states and 439 transitions. Second operand 56 states. [2020-10-13 05:14:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:56,985 INFO L93 Difference]: Finished difference Result 670 states and 778 transitions. [2020-10-13 05:14:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 05:14:56,986 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 126 [2020-10-13 05:14:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:56,987 INFO L225 Difference]: With dead ends: 670 [2020-10-13 05:14:56,987 INFO L226 Difference]: Without dead ends: 395 [2020-10-13 05:14:56,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:14:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-13 05:14:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2020-10-13 05:14:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-13 05:14:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 447 transitions. [2020-10-13 05:14:56,998 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 447 transitions. Word has length 126 [2020-10-13 05:14:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:56,999 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 447 transitions. [2020-10-13 05:14:56,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 05:14:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 447 transitions. [2020-10-13 05:14:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 05:14:57,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:57,000 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:57,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 05:14:57,000 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash -38051014, now seen corresponding path program 22 times [2020-10-13 05:14:57,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:57,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034943851] [2020-10-13 05:14:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:57,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:58,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:58,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1326 [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 05:14:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:00,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:00,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:00,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:00,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:00,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:00,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:00,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:00,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:00,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:00,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:00,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-13 05:15:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:00,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:00,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:00,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:00,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:00,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:00,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 2 proven. 2809 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:00,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034943851] [2020-10-13 05:15:00,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:00,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 05:15:00,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585587152] [2020-10-13 05:15:00,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 05:15:00,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 05:15:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:15:00,070 INFO L87 Difference]: Start difference. First operand 393 states and 447 transitions. Second operand 57 states. [2020-10-13 05:15:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:02,176 INFO L93 Difference]: Finished difference Result 682 states and 792 transitions. [2020-10-13 05:15:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 05:15:02,177 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 128 [2020-10-13 05:15:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:02,179 INFO L225 Difference]: With dead ends: 682 [2020-10-13 05:15:02,179 INFO L226 Difference]: Without dead ends: 402 [2020-10-13 05:15:02,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:15:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-13 05:15:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-10-13 05:15:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-13 05:15:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 455 transitions. [2020-10-13 05:15:02,191 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 455 transitions. Word has length 128 [2020-10-13 05:15:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:02,191 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 455 transitions. [2020-10-13 05:15:02,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 05:15:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 455 transitions. [2020-10-13 05:15:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 05:15:02,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:02,193 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:02,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 05:15:02,193 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1224993124, now seen corresponding path program 23 times [2020-10-13 05:15:02,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:02,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792285614] [2020-10-13 05:15:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1410 [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 05:15:03,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 05:15:03,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:05,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:05,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:05,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:05,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:05,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:05,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:05,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:05,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-13 05:15:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:05,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:05,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:05,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:05,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:05,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:05,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:05,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2920 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:05,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792285614] [2020-10-13 05:15:05,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:05,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 05:15:05,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899935993] [2020-10-13 05:15:05,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 05:15:05,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 05:15:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:15:05,454 INFO L87 Difference]: Start difference. First operand 400 states and 455 transitions. Second operand 58 states. [2020-10-13 05:15:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:07,553 INFO L93 Difference]: Finished difference Result 694 states and 806 transitions. [2020-10-13 05:15:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:15:07,554 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 130 [2020-10-13 05:15:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:07,556 INFO L225 Difference]: With dead ends: 694 [2020-10-13 05:15:07,556 INFO L226 Difference]: Without dead ends: 409 [2020-10-13 05:15:07,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:15:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-13 05:15:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2020-10-13 05:15:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-13 05:15:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 463 transitions. [2020-10-13 05:15:07,567 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 463 transitions. Word has length 130 [2020-10-13 05:15:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:07,568 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 463 transitions. [2020-10-13 05:15:07,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 05:15:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 463 transitions. [2020-10-13 05:15:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 05:15:07,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:07,569 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:07,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 05:15:07,569 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:07,570 INFO L82 PathProgramCache]: Analyzing trace with hash 584939902, now seen corresponding path program 24 times [2020-10-13 05:15:07,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:07,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856264817] [2020-10-13 05:15:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:09,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:09,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 05:15:09,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:09,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1753 [2020-10-13 05:15:09,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 05:15:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-13 05:15:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:11,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:11,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:11,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:11,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:11,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:11,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-13 05:15:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:11,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:11,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:11,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:11,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:11,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 2 proven. 3025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:11,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856264817] [2020-10-13 05:15:11,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:11,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 05:15:11,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736485648] [2020-10-13 05:15:11,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 05:15:11,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:11,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 05:15:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:15:11,226 INFO L87 Difference]: Start difference. First operand 407 states and 463 transitions. Second operand 59 states. [2020-10-13 05:15:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:12,905 INFO L93 Difference]: Finished difference Result 706 states and 820 transitions. [2020-10-13 05:15:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:15:12,906 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2020-10-13 05:15:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:12,909 INFO L225 Difference]: With dead ends: 706 [2020-10-13 05:15:12,909 INFO L226 Difference]: Without dead ends: 416 [2020-10-13 05:15:12,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:15:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-13 05:15:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2020-10-13 05:15:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-13 05:15:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 471 transitions. [2020-10-13 05:15:12,921 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 471 transitions. Word has length 132 [2020-10-13 05:15:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:12,921 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 471 transitions. [2020-10-13 05:15:12,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 05:15:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 471 transitions. [2020-10-13 05:15:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 05:15:12,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:12,922 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:12,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 05:15:12,923 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash 468823008, now seen corresponding path program 25 times [2020-10-13 05:15:12,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:12,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394997788] [2020-10-13 05:15:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:12,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 05:15:14,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 05:15:14,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:16,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:16,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:16,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-13 05:15:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:16,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:16,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3140 backedges. 2 proven. 3136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:16,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394997788] [2020-10-13 05:15:16,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:16,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 05:15:16,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213311878] [2020-10-13 05:15:16,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 05:15:16,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 05:15:16,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:15:16,344 INFO L87 Difference]: Start difference. First operand 414 states and 471 transitions. Second operand 60 states. [2020-10-13 05:15:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:18,251 INFO L93 Difference]: Finished difference Result 718 states and 834 transitions. [2020-10-13 05:15:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 05:15:18,252 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 134 [2020-10-13 05:15:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:18,255 INFO L225 Difference]: With dead ends: 718 [2020-10-13 05:15:18,255 INFO L226 Difference]: Without dead ends: 423 [2020-10-13 05:15:18,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:15:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-13 05:15:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2020-10-13 05:15:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-13 05:15:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 479 transitions. [2020-10-13 05:15:18,265 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 479 transitions. Word has length 134 [2020-10-13 05:15:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:18,265 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 479 transitions. [2020-10-13 05:15:18,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 05:15:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 479 transitions. [2020-10-13 05:15:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 05:15:18,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:18,266 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:18,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 05:15:18,266 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash 549637570, now seen corresponding path program 26 times [2020-10-13 05:15:18,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:18,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787343603] [2020-10-13 05:15:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:18,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1649 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-13 05:15:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:21,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:21,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:21,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-13 05:15:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:21,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 2 proven. 3249 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:21,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787343603] [2020-10-13 05:15:21,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:21,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 05:15:21,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679045209] [2020-10-13 05:15:21,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 05:15:21,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 05:15:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:15:21,959 INFO L87 Difference]: Start difference. First operand 421 states and 479 transitions. Second operand 61 states. [2020-10-13 05:15:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:23,670 INFO L93 Difference]: Finished difference Result 730 states and 848 transitions. [2020-10-13 05:15:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 05:15:23,671 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 136 [2020-10-13 05:15:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:23,674 INFO L225 Difference]: With dead ends: 730 [2020-10-13 05:15:23,674 INFO L226 Difference]: Without dead ends: 430 [2020-10-13 05:15:23,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:15:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-13 05:15:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 428. [2020-10-13 05:15:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-13 05:15:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 487 transitions. [2020-10-13 05:15:23,685 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 487 transitions. Word has length 136 [2020-10-13 05:15:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:23,686 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 487 transitions. [2020-10-13 05:15:23,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 05:15:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 487 transitions. [2020-10-13 05:15:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 05:15:23,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:23,687 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:23,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 05:15:23,687 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:23,688 INFO L82 PathProgramCache]: Analyzing trace with hash 903020324, now seen corresponding path program 27 times [2020-10-13 05:15:23,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:23,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517271920] [2020-10-13 05:15:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:23,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-13 05:15:25,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:27,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-13 05:15:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:27,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:27,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:27,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 2 proven. 3364 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:27,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517271920] [2020-10-13 05:15:27,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:27,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 05:15:27,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160630651] [2020-10-13 05:15:27,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 05:15:27,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 05:15:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:15:27,429 INFO L87 Difference]: Start difference. First operand 428 states and 487 transitions. Second operand 62 states. [2020-10-13 05:15:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:29,886 INFO L93 Difference]: Finished difference Result 742 states and 862 transitions. [2020-10-13 05:15:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 05:15:29,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 138 [2020-10-13 05:15:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:29,889 INFO L225 Difference]: With dead ends: 742 [2020-10-13 05:15:29,889 INFO L226 Difference]: Without dead ends: 437 [2020-10-13 05:15:29,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:15:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-13 05:15:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 435. [2020-10-13 05:15:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-13 05:15:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 495 transitions. [2020-10-13 05:15:29,902 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 495 transitions. Word has length 138 [2020-10-13 05:15:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:29,902 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 495 transitions. [2020-10-13 05:15:29,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 05:15:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 495 transitions. [2020-10-13 05:15:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 05:15:29,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:29,903 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:29,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 05:15:29,904 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1201430534, now seen corresponding path program 28 times [2020-10-13 05:15:29,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:29,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451600290] [2020-10-13 05:15:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:29,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:31,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 05:15:31,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:31,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2071 [2020-10-13 05:15:31,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 05:15:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-13 05:15:32,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:34,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:34,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:34,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:34,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-13 05:15:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:34,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3485 backedges. 2 proven. 3481 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:34,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451600290] [2020-10-13 05:15:34,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:34,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 05:15:34,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14417260] [2020-10-13 05:15:34,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 05:15:34,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:34,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 05:15:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 05:15:34,126 INFO L87 Difference]: Start difference. First operand 435 states and 495 transitions. Second operand 63 states. [2020-10-13 05:15:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:35,889 INFO L93 Difference]: Finished difference Result 754 states and 876 transitions. [2020-10-13 05:15:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 05:15:35,890 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 140 [2020-10-13 05:15:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:35,893 INFO L225 Difference]: With dead ends: 754 [2020-10-13 05:15:35,893 INFO L226 Difference]: Without dead ends: 444 [2020-10-13 05:15:35,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 05:15:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-13 05:15:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2020-10-13 05:15:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-13 05:15:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 503 transitions. [2020-10-13 05:15:35,903 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 503 transitions. Word has length 140 [2020-10-13 05:15:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:35,903 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 503 transitions. [2020-10-13 05:15:35,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 05:15:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 503 transitions. [2020-10-13 05:15:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 05:15:35,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:35,904 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:35,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 05:15:35,905 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash 210833512, now seen corresponding path program 29 times [2020-10-13 05:15:35,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:35,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435798995] [2020-10-13 05:15:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:35,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:37,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 05:15:37,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-13 05:15:37,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 05:15:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-13 05:15:37,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:40,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:40,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:40,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:40,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:40,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:40,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:40,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:40,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-13 05:15:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:40,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 2 proven. 3600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:40,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435798995] [2020-10-13 05:15:40,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:40,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 05:15:40,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021163511] [2020-10-13 05:15:40,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 05:15:40,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:40,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 05:15:40,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:15:40,217 INFO L87 Difference]: Start difference. First operand 442 states and 503 transitions. Second operand 64 states. [2020-10-13 05:15:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:42,784 INFO L93 Difference]: Finished difference Result 766 states and 890 transitions. [2020-10-13 05:15:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 05:15:42,784 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 142 [2020-10-13 05:15:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:42,786 INFO L225 Difference]: With dead ends: 766 [2020-10-13 05:15:42,786 INFO L226 Difference]: Without dead ends: 451 [2020-10-13 05:15:42,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:15:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-13 05:15:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2020-10-13 05:15:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-13 05:15:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 511 transitions. [2020-10-13 05:15:42,796 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 511 transitions. Word has length 142 [2020-10-13 05:15:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:42,796 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 511 transitions. [2020-10-13 05:15:42,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 05:15:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 511 transitions. [2020-10-13 05:15:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 05:15:42,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:42,797 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:42,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 05:15:42,797 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:42,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:42,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1729835082, now seen corresponding path program 30 times [2020-10-13 05:15:42,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:42,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301769927] [2020-10-13 05:15:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:42,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking...