/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:14:53,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:14:53,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:14:53,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:14:53,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:14:53,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:14:53,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:14:53,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:14:53,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:14:53,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:14:53,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:14:53,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:14:53,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:14:53,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:14:53,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:14:53,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:14:53,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:14:53,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:14:53,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:14:53,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:14:53,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:14:53,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:14:53,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:14:53,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:14:53,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:14:53,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:14:53,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:14:53,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:14:53,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:14:53,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:14:53,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:14:53,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:14:53,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:14:53,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:14:53,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:14:53,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:14:53,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:14:53,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:14:53,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:14:53,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:14:53,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:14:53,549 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 [2020-10-12 16:14:53,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:14:53,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:14:53,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:14:53,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:14:53,601 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:14:53,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:14:53,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:14:53,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:14:53,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:14:53,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:14:53,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:14:53,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:14:53,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:14:53,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:14:53,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:14:53,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:14:53,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:14:53,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:14:53,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:14:53,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:14:53,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:14:53,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:14:53,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:14:53,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:14:53,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:14:53,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:14:53,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:14:53,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:14:53,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:14:53,605 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:14:53,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:14:53,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:14:53,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:14:53,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:14:53,895 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:14:53,896 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2020-10-12 16:14:53,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc795923/1635922afe9e4f469c65463f77731c1b/FLAGf48817c62 [2020-10-12 16:14:54,430 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:14:54,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2020-10-12 16:14:54,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc795923/1635922afe9e4f469c65463f77731c1b/FLAGf48817c62 [2020-10-12 16:14:54,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc795923/1635922afe9e4f469c65463f77731c1b [2020-10-12 16:14:54,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:14:54,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:14:54,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:14:54,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:14:54,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:14:54,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:14:54" (1/1) ... [2020-10-12 16:14:54,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39bc374b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:54, skipping insertion in model container [2020-10-12 16:14:54,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:14:54" (1/1) ... [2020-10-12 16:14:54,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:14:54,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:14:55,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:14:55,093 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:14:55,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:14:55,120 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:14:55,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55 WrapperNode [2020-10-12 16:14:55,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:14:55,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:14:55,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:14:55,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:14:55,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (1/1) ... [2020-10-12 16:14:55,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:14:55,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:14:55,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:14:55,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:14:55,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (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 [2020-10-12 16:14:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:14:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:14:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:14:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:14:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:14:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:14:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:14:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:14:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:14:55,460 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:14:55,460 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:14:55,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:14:55 BoogieIcfgContainer [2020-10-12 16:14:55,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:14:55,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:14:55,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:14:55,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:14:55,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:14:54" (1/3) ... [2020-10-12 16:14:55,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610c7ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:14:55, skipping insertion in model container [2020-10-12 16:14:55,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:55" (2/3) ... [2020-10-12 16:14:55,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610c7ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:14:55, skipping insertion in model container [2020-10-12 16:14:55,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:14:55" (3/3) ... [2020-10-12 16:14:55,472 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2020-10-12 16:14:55,482 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:14:55,489 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:14:55,503 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:14:55,528 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:14:55,528 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:14:55,528 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:14:55,528 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:14:55,529 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:14:55,529 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:14:55,529 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:14:55,529 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:14:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 16:14:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:14:55,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:55,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:55,552 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-12 16:14:55,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:55,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960695272] [2020-10-12 16:14:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:55,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:55,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:14:55,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:55,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-12 16:14:55,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:55,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:14:55,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:14:55,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:14:55,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:55,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:55,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:55,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:14:55,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:55,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:55,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960695272] [2020-10-12 16:14:55,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:14:55,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:14:55,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680141719] [2020-10-12 16:14:55,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:14:55,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:14:56,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:14:56,025 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-12 16:14:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:56,239 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-10-12 16:14:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:14:56,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:14:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:56,253 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:14:56,253 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:14:56,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:14:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-12 16:14:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:14:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-12 16:14:56,305 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-12 16:14:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:56,305 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-12 16:14:56,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:14:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-12 16:14:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:14:56,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:56,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:56,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:14:56,308 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2020-10-12 16:14:56,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:56,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425750869] [2020-10-12 16:14:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:56,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:14:56,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-12 16:14:56,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:14:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:14:56,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:56,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:56,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:56,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:56,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:14:56,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:56,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425750869] [2020-10-12 16:14:56,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:56,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:14:56,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904612810] [2020-10-12 16:14:56,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:14:56,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:14:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:14:56,679 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-12 16:14:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:56,730 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-12 16:14:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:14:56,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 16:14:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:56,733 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:14:56,733 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:14:56,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:14:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:14:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-12 16:14:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:14:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-12 16:14:56,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-12 16:14:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:56,750 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-12 16:14:56,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:14:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-12 16:14:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:14:56,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:56,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:56,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:14:56,753 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:56,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1182180650, now seen corresponding path program 2 times [2020-10-12 16:14:56,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:56,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705744596] [2020-10-12 16:14:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:14:57,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:57,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-12 16:14:57,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:14:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:14:57,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:57,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:57,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:57,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:57,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:57,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:57,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:57,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:57,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705744596] [2020-10-12 16:14:57,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:57,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:14:57,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668350938] [2020-10-12 16:14:57,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:14:57,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:57,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:14:57,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:14:57,350 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-12 16:14:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:57,432 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-10-12 16:14:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:14:57,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-12 16:14:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:57,434 INFO L225 Difference]: With dead ends: 28 [2020-10-12 16:14:57,434 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:14:57,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:14:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-12 16:14:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:14:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-12 16:14:57,445 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-12 16:14:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:57,446 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-12 16:14:57,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:14:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-12 16:14:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:14:57,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:57,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:57,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:14:57,448 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2055818357, now seen corresponding path program 3 times [2020-10-12 16:14:57,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:57,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537826107] [2020-10-12 16:14:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:57,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:14:57,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-12 16:14:57,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:14:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:14:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:58,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:58,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:58,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:58,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:58,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:58,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537826107] [2020-10-12 16:14:58,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:58,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:14:58,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545528461] [2020-10-12 16:14:58,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:14:58,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:14:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:58,062 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-12 16:14:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:58,189 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-10-12 16:14:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:14:58,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-12 16:14:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:58,190 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:14:58,191 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:14:58,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:14:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-12 16:14:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:14:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-12 16:14:58,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2020-10-12 16:14:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:58,198 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-12 16:14:58,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:14:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-12 16:14:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:14:58,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:58,199 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:58,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:14:58,200 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:58,200 INFO L82 PathProgramCache]: Analyzing trace with hash 318767734, now seen corresponding path program 4 times [2020-10-12 16:14:58,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:58,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557812095] [2020-10-12 16:14:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:14:58,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:58,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-12 16:14:58,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:14:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:14:58,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:58,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:58,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:58,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:58,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:58,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:58,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:58,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:58,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557812095] [2020-10-12 16:14:58,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:58,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:14:58,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337983687] [2020-10-12 16:14:58,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:14:58,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:14:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:14:58,903 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-10-12 16:14:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:59,063 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-12 16:14:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:14:59,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 16:14:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:59,064 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:14:59,065 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:14:59,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:14:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-10-12 16:14:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:14:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-12 16:14:59,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2020-10-12 16:14:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:59,072 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-12 16:14:59,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:14:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-12 16:14:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:14:59,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:59,073 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:59,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:14:59,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1904607445, now seen corresponding path program 5 times [2020-10-12 16:14:59,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:59,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378194342] [2020-10-12 16:14:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:00,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:15:00,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:15:00,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-12 16:15:00,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:00,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:15:00,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:00,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:15:00,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:00,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:00,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:00,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:00,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:00,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:00,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:00,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:00,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378194342] [2020-10-12 16:15:00,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:00,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:15:00,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978939014] [2020-10-12 16:15:00,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:15:00,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:00,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:15:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:15:00,277 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-10-12 16:15:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:00,497 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-12 16:15:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:15:00,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-12 16:15:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:00,499 INFO L225 Difference]: With dead ends: 46 [2020-10-12 16:15:00,499 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:15:00,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:15:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:15:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-12 16:15:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:15:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-12 16:15:00,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2020-10-12 16:15:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:00,507 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-12 16:15:00,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:15:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-12 16:15:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:15:00,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:00,509 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:00,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:15:00,509 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1015181846, now seen corresponding path program 6 times [2020-10-12 16:15:00,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:00,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680683847] [2020-10-12 16:15:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:02,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:15:02,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:15:02,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-12 16:15:02,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:02,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:15:02,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:02,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:15:02,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:02,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:02,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:02,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:02,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:02,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:15:02,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:02,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680683847] [2020-10-12 16:15:02,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:02,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:15:02,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377905917] [2020-10-12 16:15:02,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:15:02,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:02,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:15:02,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:15:02,440 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2020-10-12 16:15:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:02,734 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-12 16:15:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:15:02,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-12 16:15:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:02,735 INFO L225 Difference]: With dead ends: 52 [2020-10-12 16:15:02,736 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:15:02,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:15:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:15:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2020-10-12 16:15:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:15:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-12 16:15:02,742 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 28 [2020-10-12 16:15:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:02,743 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-12 16:15:02,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:15:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-12 16:15:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:15:02,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:02,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:02,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:15:02,744 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash -209588939, now seen corresponding path program 7 times [2020-10-12 16:15:02,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:02,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390440618] [2020-10-12 16:15:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:05,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:15:05,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:15:05,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-12 16:15:05,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:05,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:15:05,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:05,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:15:05,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:05,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:05,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:05,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:05,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:05,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390440618] [2020-10-12 16:15:05,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:05,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:15:05,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698521977] [2020-10-12 16:15:05,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:15:05,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:15:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:15:05,234 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-10-12 16:15:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:05,418 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-10-12 16:15:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:15:05,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 16:15:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:05,420 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:15:05,420 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:15:05,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:15:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:15:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-12 16:15:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:15:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-12 16:15:05,426 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-10-12 16:15:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:05,427 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-12 16:15:05,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:15:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-12 16:15:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:15:05,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:05,428 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:05,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:15:05,428 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1153812940, now seen corresponding path program 1 times [2020-10-12 16:15:05,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:05,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49251253] [2020-10-12 16:15:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:08,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:15:08,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:15:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3186 [2020-10-12 16:15:08,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:15:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:15:08,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:09,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:09,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:09,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:09,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:09,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:09,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:09,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:09,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:09,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:09,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49251253] [2020-10-12 16:15:09,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:09,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:15:09,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047518911] [2020-10-12 16:15:09,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:15:09,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:15:09,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:09,041 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 11 states. [2020-10-12 16:15:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:09,238 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-12 16:15:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:15:09,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-12 16:15:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:09,240 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:15:09,240 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:15:09,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:15:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 16:15:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:15:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 16:15:09,250 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-12 16:15:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:09,251 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 16:15:09,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:15:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 16:15:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:15:09,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:09,253 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:09,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:15:09,253 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1049709655, now seen corresponding path program 2 times [2020-10-12 16:15:09,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:09,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049618683] [2020-10-12 16:15:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:09,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:14,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:15:14,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:15:14,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:15:14,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:14,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:15:14,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:14,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:15:14,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:18,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:18,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:18,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:18,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:18,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:18,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:18,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:18,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:18,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 3 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:18,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049618683] [2020-10-12 16:15:18,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:18,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:15:18,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891897619] [2020-10-12 16:15:18,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:15:18,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:15:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=102, Unknown=2, NotChecked=0, Total=132 [2020-10-12 16:15:18,840 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2020-10-12 16:15:21,926 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-12 16:15:22,333 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2020-10-12 16:15:24,572 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2020-10-12 16:15:25,184 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2020-10-12 16:15:27,646 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 93 DAG size of output: 28 [2020-10-12 16:15:29,430 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-12 16:15:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:34,800 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2020-10-12 16:15:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:15:34,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-12 16:15:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:34,803 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:15:34,803 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:15:34,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=326, Invalid=793, Unknown=3, NotChecked=0, Total=1122 [2020-10-12 16:15:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:15:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-12 16:15:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:15:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-12 16:15:34,824 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 37 [2020-10-12 16:15:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:34,826 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-12 16:15:34,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:15:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-12 16:15:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:15:34,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:34,829 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:34,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:15:34,829 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1706844937, now seen corresponding path program 3 times [2020-10-12 16:15:34,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:34,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455142566] [2020-10-12 16:15:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:34,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:39,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:15:39,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:15:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 16:15:39,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:15:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:15:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:40,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:40,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:40,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:40,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455142566] [2020-10-12 16:15:40,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:40,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:15:40,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094066111] [2020-10-12 16:15:40,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:15:40,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:15:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:15:40,827 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 18 states. [2020-10-12 16:15:51,957 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:15:58,388 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-12 16:16:07,304 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-12 16:16:11,878 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-12 16:16:17,059 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-12 16:16:20,680 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-12 16:16:31,292 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-10-12 16:16:40,482 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2020-10-12 16:16:44,670 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-12 16:16:52,423 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2020-10-12 16:16:54,494 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-12 16:17:00,723 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 73 DAG size of output: 25 [2020-10-12 16:17:08,766 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-10-12 16:17:15,248 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-12 16:17:17,276 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-12 16:17:20,951 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 79 DAG size of output: 23 [2020-10-12 16:17:22,940 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-10-12 16:17:24,992 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-12 16:17:31,330 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 81 DAG size of output: 25 [2020-10-12 16:17:37,620 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-12 16:17:45,419 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-12 16:17:47,390 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-12 16:17:49,474 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-12 16:17:55,958 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 89 DAG size of output: 25 [2020-10-12 16:18:10,164 WARN L193 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 95 DAG size of output: 23 [2020-10-12 16:18:13,794 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-12 16:18:17,863 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-12 16:18:20,496 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-12 16:18:23,036 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-12 16:18:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:26,834 INFO L93 Difference]: Finished difference Result 227 states and 287 transitions. [2020-10-12 16:18:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:18:26,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-12 16:18:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:26,837 INFO L225 Difference]: With dead ends: 227 [2020-10-12 16:18:26,837 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 16:18:26,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 132.3s TimeCoverageRelationStatistics Valid=513, Invalid=1758, Unknown=17, NotChecked=792, Total=3080 [2020-10-12 16:18:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 16:18:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 74. [2020-10-12 16:18:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:18:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-10-12 16:18:26,868 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 55 [2020-10-12 16:18:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:26,868 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-10-12 16:18:26,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:18:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-10-12 16:18:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:18:26,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:26,875 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:26,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:18:26,876 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:26,876 INFO L82 PathProgramCache]: Analyzing trace with hash 758015959, now seen corresponding path program 4 times [2020-10-12 16:18:26,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:26,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010989689] [2020-10-12 16:18:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:26,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:26,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:27,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:27,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:29,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:29,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:30,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:30,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:31,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:31,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:31,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:18:31,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 16:18:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:18:31,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:31,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:18:31,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:31,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:18:31,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:33,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:33,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:33,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:33,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:18:33,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010989689] [2020-10-12 16:18:33,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:33,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:18:33,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822718790] [2020-10-12 16:18:33,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:18:33,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:18:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:18:33,068 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 20 states. [2020-10-12 16:18:36,651 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-10-12 16:18:38,511 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2020-10-12 16:18:44,849 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-10-12 16:18:47,299 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-10-12 16:18:53,829 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-10-12 16:19:02,650 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2020-10-12 16:19:07,612 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2020-10-12 16:19:12,732 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 60 DAG size of output: 25