/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/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:11:30,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:11:30,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:11:30,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:11:30,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:11:30,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:11:30,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:11:30,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:11:30,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:11:30,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:11:30,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:11:30,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:11:30,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:11:30,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:11:30,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:11:30,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:11:30,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:11:30,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:11:30,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:11:30,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:11:30,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:11:30,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:11:30,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:11:30,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:11:30,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:11:30,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:11:30,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:11:30,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:11:30,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:11:30,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:11:30,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:11:30,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:11:30,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:11:30,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:11:30,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:11:30,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:11:30,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:11:30,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:11:30,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:11:30,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:11:30,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:11:30,344 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 16:11:30,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:11:30,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:11:30,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:11:30,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:11:30,369 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:11:30,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:11:30,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:11:30,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:11:30,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:11:30,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:11:30,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:11:30,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:11:30,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:11:30,371 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:11:30,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:11:30,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:11:30,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:11:30,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:11:30,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:11:30,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:11:30,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:11:30,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:11:30,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:11:30,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:11:30,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:11:30,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:11:30,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:11:30,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:11:30,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:11:30,374 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 16:11:30,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:11:30,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:11:30,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:11:30,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:11:30,707 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:11:30,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-12 16:11:30,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/405f4b076/358b64f4652f4313b73a5431cbed6947/FLAG86c3aed31 [2020-10-12 16:11:31,204 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:11:31,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-12 16:11:31,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/405f4b076/358b64f4652f4313b73a5431cbed6947/FLAG86c3aed31 [2020-10-12 16:11:31,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/405f4b076/358b64f4652f4313b73a5431cbed6947 [2020-10-12 16:11:31,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:11:31,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:11:31,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:11:31,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:11:31,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:11:31,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:31,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f77297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31, skipping insertion in model container [2020-10-12 16:11:31,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:31,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:11:31,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:11:31,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:11:31,838 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:11:31,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:11:31,875 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:11:31,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31 WrapperNode [2020-10-12 16:11:31,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:11:31,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:11:31,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:11:31,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:11:31,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:31,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:31,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:31,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:31,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:32,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:32,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (1/1) ... [2020-10-12 16:11:32,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:11:32,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:11:32,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:11:32,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:11:32,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (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 16:11:32,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:11:32,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:11:32,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:11:32,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:11:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:11:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:11:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:11:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:11:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:11:32,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:11:32,294 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:11:32,294 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 16:11:32,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:11:32 BoogieIcfgContainer [2020-10-12 16:11:32,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:11:32,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:11:32,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:11:32,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:11:32,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:11:31" (1/3) ... [2020-10-12 16:11:32,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c15366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:11:32, skipping insertion in model container [2020-10-12 16:11:32,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:31" (2/3) ... [2020-10-12 16:11:32,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c15366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:11:32, skipping insertion in model container [2020-10-12 16:11:32,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:11:32" (3/3) ... [2020-10-12 16:11:32,307 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de51.c [2020-10-12 16:11:32,319 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:11:32,327 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:11:32,344 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:11:32,381 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:11:32,382 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:11:32,382 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:11:32,382 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:11:32,383 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:11:32,383 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:11:32,383 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:11:32,383 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:11:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-12 16:11:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:11:32,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:32,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:32,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-12 16:11:32,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:32,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420318213] [2020-10-12 16:11:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:32,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:32,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:11:32,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-12 16:11:32,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:11:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:11:32,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:11:32,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:32,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:32,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:32,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:32,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:32,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:32,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:32,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:32,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:32,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:32,883 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 16:11:32,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420318213] [2020-10-12 16:11:32,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:32,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:11:32,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561072311] [2020-10-12 16:11:32,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:32,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:32,918 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-10-12 16:11:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:33,025 INFO L93 Difference]: Finished difference Result 54 states and 85 transitions. [2020-10-12 16:11:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:33,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-12 16:11:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:33,036 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:11:33,037 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:11:33,041 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 16:11:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:11:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:11:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:11:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-12 16:11:33,078 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2020-10-12 16:11:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:33,079 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-12 16:11:33,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-12 16:11:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:33,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:33,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:33,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:11:33,081 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-12 16:11:33,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:33,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919543522] [2020-10-12 16:11:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:33,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:33,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:33,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-12 16:11:33,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:33,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:33,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:33,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:11:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:33,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:33,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:33,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:33,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:33,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:33,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919543522] [2020-10-12 16:11:33,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:33,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:11:33,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805245692] [2020-10-12 16:11:33,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:33,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:33,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:33,444 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 7 states. [2020-10-12 16:11:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:33,676 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-10-12 16:11:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:33,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-12 16:11:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:33,679 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:11:33,680 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:11:33,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:11:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-12 16:11:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:11:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-12 16:11:33,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 16 [2020-10-12 16:11:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:33,691 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-12 16:11:33,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-12 16:11:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:33,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:33,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:33,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:11:33,693 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-12 16:11:33,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:33,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554614822] [2020-10-12 16:11:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:33,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:33,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:33,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-12 16:11:33,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:11:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:33,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554614822] [2020-10-12 16:11:33,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:33,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:11:33,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650588461] [2020-10-12 16:11:33,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:33,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:33,932 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-10-12 16:11:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:33,981 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2020-10-12 16:11:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:33,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 16:11:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:33,982 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:11:33,982 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:11:33,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:11:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:11:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:11:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-10-12 16:11:33,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2020-10-12 16:11:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:33,988 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-12 16:11:33,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-10-12 16:11:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:33,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:33,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:33,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:11:33,990 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash -436127603, now seen corresponding path program 1 times [2020-10-12 16:11:33,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:33,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872105391] [2020-10-12 16:11:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:34,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:34,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:34,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 16:11:34,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:11:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:34,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:34,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:34,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:34,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:34,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:11:34,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:34,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:34,226 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 16:11:34,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872105391] [2020-10-12 16:11:34,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:34,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:11:34,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578036631] [2020-10-12 16:11:34,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:34,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:34,232 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2020-10-12 16:11:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:34,326 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2020-10-12 16:11:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:11:34,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-12 16:11:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:34,329 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:11:34,330 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:11:34,330 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 16:11:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:11:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-12 16:11:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:11:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-10-12 16:11:34,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 16 [2020-10-12 16:11:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:34,345 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-10-12 16:11:34,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-10-12 16:11:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:11:34,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:34,346 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:34,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:11:34,347 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1807046878, now seen corresponding path program 2 times [2020-10-12 16:11:34,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:34,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860087760] [2020-10-12 16:11:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:34,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:11:34,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:34,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 16:11:34,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:34,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:34,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:34,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:11:34,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:34,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:34,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:34,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:34,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:34,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:34,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860087760] [2020-10-12 16:11:34,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:34,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:34,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275554216] [2020-10-12 16:11:34,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:34,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:34,797 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 6 states. [2020-10-12 16:11:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:34,913 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2020-10-12 16:11:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:34,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 16:11:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:34,916 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:11:34,917 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:11:34,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:11:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-10-12 16:11:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:11:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-12 16:11:34,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 17 [2020-10-12 16:11:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:34,931 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-12 16:11:34,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-12 16:11:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:11:34,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:34,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:34,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:11:34,933 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2058308578, now seen corresponding path program 1 times [2020-10-12 16:11:34,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:34,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634103216] [2020-10-12 16:11:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:11:35,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:35,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-12 16:11:35,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:35,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:35,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:35,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:35,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:35,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:35,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:35,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:35,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:35,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634103216] [2020-10-12 16:11:35,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:35,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:35,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959294679] [2020-10-12 16:11:35,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:35,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:35,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:35,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:35,354 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2020-10-12 16:11:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:35,456 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-10-12 16:11:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:35,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 16:11:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:35,459 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:11:35,459 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:11:35,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:11:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-12 16:11:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:11:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-10-12 16:11:35,468 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 18 [2020-10-12 16:11:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:35,468 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-10-12 16:11:35,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-10-12 16:11:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:11:35,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:35,469 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:35,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:11:35,470 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1668988243, now seen corresponding path program 3 times [2020-10-12 16:11:35,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:35,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43432120] [2020-10-12 16:11:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:11:35,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:35,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-12 16:11:35,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:11:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-12 16:11:35,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:35,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:35,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:35,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:35,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43432120] [2020-10-12 16:11:35,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:35,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:35,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486999294] [2020-10-12 16:11:35,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:35,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:35,700 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 7 states. [2020-10-12 16:11:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:35,846 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-10-12 16:11:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:11:35,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 16:11:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:35,848 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:11:35,848 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:11:35,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:11:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2020-10-12 16:11:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:11:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-10-12 16:11:35,856 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2020-10-12 16:11:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:35,856 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-10-12 16:11:35,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-10-12 16:11:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:35,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:35,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:35,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:11:35,858 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2055309710, now seen corresponding path program 1 times [2020-10-12 16:11:35,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:35,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127899261] [2020-10-12 16:11:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:35,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:35,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 16:11:35,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:11:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:11:35,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:36,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:36,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:36,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:36,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127899261] [2020-10-12 16:11:36,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:36,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:36,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013982094] [2020-10-12 16:11:36,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:36,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:36,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:36,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:36,012 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 4 states. [2020-10-12 16:11:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:36,046 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-12 16:11:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:36,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 16:11:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:36,048 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:11:36,048 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:11:36,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:11:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-12 16:11:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:11:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-10-12 16:11:36,055 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 19 [2020-10-12 16:11:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:36,056 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-10-12 16:11:36,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-10-12 16:11:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:36,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:36,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:36,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:11:36,058 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash 652481311, now seen corresponding path program 1 times [2020-10-12 16:11:36,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:36,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537777627] [2020-10-12 16:11:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:36,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:36,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-12 16:11:36,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:36,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:11:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:36,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:36,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:36,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:11:36,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537777627] [2020-10-12 16:11:36,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:36,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:36,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654961382] [2020-10-12 16:11:36,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:36,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:36,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:36,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:36,357 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 9 states. [2020-10-12 16:11:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:36,553 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-12 16:11:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:36,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-12 16:11:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:36,554 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:11:36,554 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:11:36,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:11:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-12 16:11:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:11:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-10-12 16:11:36,561 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 19 [2020-10-12 16:11:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:36,561 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-10-12 16:11:36,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-10-12 16:11:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:36,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:36,563 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:36,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:11:36,563 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:36,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2051894594, now seen corresponding path program 4 times [2020-10-12 16:11:36,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:36,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091927468] [2020-10-12 16:11:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:36,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:36,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-12 16:11:36,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:36,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:36,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:36,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:36,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:36,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:36,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:36,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:36,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:36,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:36,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091927468] [2020-10-12 16:11:36,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:36,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:36,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316383797] [2020-10-12 16:11:36,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:36,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:36,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:36,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:36,911 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-10-12 16:11:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:37,073 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2020-10-12 16:11:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:11:37,073 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 16:11:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:37,074 INFO L225 Difference]: With dead ends: 101 [2020-10-12 16:11:37,074 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:11:37,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:11:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2020-10-12 16:11:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:11:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2020-10-12 16:11:37,081 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 19 [2020-10-12 16:11:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:37,082 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2020-10-12 16:11:37,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2020-10-12 16:11:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:11:37,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:37,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:37,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:11:37,083 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash -686845170, now seen corresponding path program 2 times [2020-10-12 16:11:37,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:37,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136603313] [2020-10-12 16:11:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:37,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:37,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:11:37,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:11:37,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-12 16:11:37,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:11:37,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:38,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:38,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:38,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:38,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:38,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:38,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:38,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:38,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:38,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136603313] [2020-10-12 16:11:38,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:38,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:38,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719857258] [2020-10-12 16:11:38,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:38,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:38,012 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand 8 states. [2020-10-12 16:11:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:38,148 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2020-10-12 16:11:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:11:38,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 16:11:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:38,149 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:11:38,149 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:11:38,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:11:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-12 16:11:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:11:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-12 16:11:38,156 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 20 [2020-10-12 16:11:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:38,157 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-12 16:11:38,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-10-12 16:11:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:11:38,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:38,158 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:38,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:11:38,159 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1037089587, now seen corresponding path program 5 times [2020-10-12 16:11:38,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:38,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805579402] [2020-10-12 16:11:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:38,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:11:38,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:38,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-12 16:11:38,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:38,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:38,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:11:38,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:38,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:38,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:38,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:38,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:38,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:38,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:38,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805579402] [2020-10-12 16:11:38,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:38,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:38,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677848151] [2020-10-12 16:11:38,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:38,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:38,692 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 9 states. [2020-10-12 16:11:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:38,914 INFO L93 Difference]: Finished difference Result 114 states and 165 transitions. [2020-10-12 16:11:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:38,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 16:11:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:38,916 INFO L225 Difference]: With dead ends: 114 [2020-10-12 16:11:38,916 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:11:38,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:11:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 59. [2020-10-12 16:11:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:11:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2020-10-12 16:11:38,924 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 20 [2020-10-12 16:11:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:38,924 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2020-10-12 16:11:38,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2020-10-12 16:11:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:38,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:38,925 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:38,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:11:38,926 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash 604884398, now seen corresponding path program 1 times [2020-10-12 16:11:38,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:38,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988049274] [2020-10-12 16:11:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:39,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:39,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-12 16:11:39,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:39,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:11:39,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:39,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:39,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:39,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:39,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:39,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:39,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988049274] [2020-10-12 16:11:39,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:39,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:39,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688387131] [2020-10-12 16:11:39,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:39,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:39,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:39,243 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 6 states. [2020-10-12 16:11:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:39,317 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-10-12 16:11:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:11:39,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-12 16:11:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:39,319 INFO L225 Difference]: With dead ends: 68 [2020-10-12 16:11:39,319 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:11:39,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:11:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 16:11:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:11:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-12 16:11:39,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 21 [2020-10-12 16:11:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:39,325 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-12 16:11:39,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-12 16:11:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:39,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:39,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:39,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:11:39,327 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1119782654, now seen corresponding path program 3 times [2020-10-12 16:11:39,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:39,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792418770] [2020-10-12 16:11:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:39,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-12 16:11:39,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:11:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:40,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:40,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:40,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:40,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:40,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:40,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792418770] [2020-10-12 16:11:40,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:40,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:40,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016013775] [2020-10-12 16:11:40,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:40,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:40,109 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 8 states. [2020-10-12 16:11:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:40,248 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-10-12 16:11:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:11:40,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 16:11:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:40,250 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:11:40,251 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:11:40,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:11:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-12 16:11:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:11:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2020-10-12 16:11:40,257 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 21 [2020-10-12 16:11:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:40,257 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2020-10-12 16:11:40,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2020-10-12 16:11:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:40,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:40,258 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:40,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:11:40,259 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash 357094558, now seen corresponding path program 6 times [2020-10-12 16:11:40,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:40,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910433251] [2020-10-12 16:11:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:40,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:40,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-12 16:11:40,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:11:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:40,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:40,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:40,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:40,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:40,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:40,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910433251] [2020-10-12 16:11:40,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:40,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:40,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377002432] [2020-10-12 16:11:40,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:40,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:40,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:40,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:40,870 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand 10 states. [2020-10-12 16:11:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:41,118 INFO L93 Difference]: Finished difference Result 106 states and 159 transitions. [2020-10-12 16:11:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:41,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-12 16:11:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:41,121 INFO L225 Difference]: With dead ends: 106 [2020-10-12 16:11:41,121 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:11:41,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:11:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2020-10-12 16:11:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:11:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2020-10-12 16:11:41,133 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 21 [2020-10-12 16:11:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:41,133 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2020-10-12 16:11:41,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2020-10-12 16:11:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:41,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:41,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:41,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:11:41,135 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1791890094, now seen corresponding path program 2 times [2020-10-12 16:11:41,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:41,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885878181] [2020-10-12 16:11:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:41,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:41,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:41,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-12 16:11:41,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:11:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:41,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:41,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:41,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:41,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:41,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:41,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:41,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:41,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:11:41,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885878181] [2020-10-12 16:11:41,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:41,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:11:41,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456108882] [2020-10-12 16:11:41,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:41,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:41,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:41,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:41,677 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand 5 states. [2020-10-12 16:11:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:41,804 INFO L93 Difference]: Finished difference Result 93 states and 128 transitions. [2020-10-12 16:11:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:41,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-12 16:11:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:41,807 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:11:41,807 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:11:41,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:11:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2020-10-12 16:11:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:11:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2020-10-12 16:11:41,814 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 22 [2020-10-12 16:11:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:41,815 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2020-10-12 16:11:41,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2020-10-12 16:11:41,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:41,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:41,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:41,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:11:41,816 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash 389061695, now seen corresponding path program 2 times [2020-10-12 16:11:41,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:41,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012580379] [2020-10-12 16:11:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:42,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-12 16:11:42,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:42,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:42,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:11:42,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012580379] [2020-10-12 16:11:42,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:42,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:42,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140355674] [2020-10-12 16:11:42,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:42,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:42,426 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand 6 states. [2020-10-12 16:11:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:42,539 INFO L93 Difference]: Finished difference Result 130 states and 192 transitions. [2020-10-12 16:11:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:42,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 16:11:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:42,541 INFO L225 Difference]: With dead ends: 130 [2020-10-12 16:11:42,541 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:11:42,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:11:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2020-10-12 16:11:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:11:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 145 transitions. [2020-10-12 16:11:42,555 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 145 transitions. Word has length 22 [2020-10-12 16:11:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:42,555 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 145 transitions. [2020-10-12 16:11:42,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 145 transitions. [2020-10-12 16:11:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:42,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:42,557 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:42,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:11:42,558 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash 627130093, now seen corresponding path program 7 times [2020-10-12 16:11:42,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:42,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815938979] [2020-10-12 16:11:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:42,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:42,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-12 16:11:42,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:11:42,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:42,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:42,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:42,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:42,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:42,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:42,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:42,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:42,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815938979] [2020-10-12 16:11:42,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:42,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:11:42,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849707901] [2020-10-12 16:11:42,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:11:42,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:42,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:11:42,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:42,977 INFO L87 Difference]: Start difference. First operand 104 states and 145 transitions. Second operand 11 states. [2020-10-12 16:11:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:43,268 INFO L93 Difference]: Finished difference Result 200 states and 303 transitions. [2020-10-12 16:11:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:43,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 16:11:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:43,272 INFO L225 Difference]: With dead ends: 200 [2020-10-12 16:11:43,272 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 16:11:43,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 16:11:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 113. [2020-10-12 16:11:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:11:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2020-10-12 16:11:43,283 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 22 [2020-10-12 16:11:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:43,284 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2020-10-12 16:11:43,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:11:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2020-10-12 16:11:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:11:43,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:43,285 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:43,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:11:43,285 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1391612975, now seen corresponding path program 3 times [2020-10-12 16:11:43,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:43,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979910463] [2020-10-12 16:11:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:43,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:44,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:11:44,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:44,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1695 [2020-10-12 16:11:44,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:44,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:44,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:45,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:45,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:45,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:45,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:45,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:11:45,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979910463] [2020-10-12 16:11:45,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:45,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:45,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196466256] [2020-10-12 16:11:45,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:45,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:45,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:45,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:45,080 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand 8 states. [2020-10-12 16:11:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:45,254 INFO L93 Difference]: Finished difference Result 127 states and 176 transitions. [2020-10-12 16:11:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:11:45,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-12 16:11:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:45,255 INFO L225 Difference]: With dead ends: 127 [2020-10-12 16:11:45,256 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 16:11:45,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 16:11:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-12 16:11:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 16:11:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2020-10-12 16:11:45,268 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 23 [2020-10-12 16:11:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:45,268 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2020-10-12 16:11:45,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2020-10-12 16:11:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:11:45,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:45,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:45,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:11:45,271 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:45,271 INFO L82 PathProgramCache]: Analyzing trace with hash -570639538, now seen corresponding path program 3 times [2020-10-12 16:11:45,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:45,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624283371] [2020-10-12 16:11:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:45,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:11:45,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-12 16:11:45,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:11:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:46,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:46,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:46,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:46,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624283371] [2020-10-12 16:11:46,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:46,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:46,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56931856] [2020-10-12 16:11:46,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:46,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:46,067 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand 10 states. [2020-10-12 16:11:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:46,283 INFO L93 Difference]: Finished difference Result 148 states and 200 transitions. [2020-10-12 16:11:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:46,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 16:11:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:46,286 INFO L225 Difference]: With dead ends: 148 [2020-10-12 16:11:46,286 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 16:11:46,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 16:11:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2020-10-12 16:11:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 16:11:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 151 transitions. [2020-10-12 16:11:46,303 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 151 transitions. Word has length 23 [2020-10-12 16:11:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:46,304 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 151 transitions. [2020-10-12 16:11:46,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 151 transitions. [2020-10-12 16:11:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:11:46,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:46,305 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:46,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:11:46,306 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash 408297086, now seen corresponding path program 8 times [2020-10-12 16:11:46,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:46,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434679936] [2020-10-12 16:11:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:46,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:46,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:11:46,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:46,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-12 16:11:46,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:11:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:11:46,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:46,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:46,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:46,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:46,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:46,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434679936] [2020-10-12 16:11:46,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:46,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:11:46,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100187639] [2020-10-12 16:11:46,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:11:46,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:11:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:46,868 INFO L87 Difference]: Start difference. First operand 110 states and 151 transitions. Second operand 12 states. [2020-10-12 16:11:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:47,249 INFO L93 Difference]: Finished difference Result 220 states and 326 transitions. [2020-10-12 16:11:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:11:47,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-12 16:11:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:47,251 INFO L225 Difference]: With dead ends: 220 [2020-10-12 16:11:47,251 INFO L226 Difference]: Without dead ends: 197 [2020-10-12 16:11:47,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-12 16:11:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 119. [2020-10-12 16:11:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 16:11:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 164 transitions. [2020-10-12 16:11:47,263 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 164 transitions. Word has length 23 [2020-10-12 16:11:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:47,264 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 164 transitions. [2020-10-12 16:11:47,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:11:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 164 transitions. [2020-10-12 16:11:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:47,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:47,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:47,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:11:47,265 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash 843592862, now seen corresponding path program 4 times [2020-10-12 16:11:47,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:47,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502436351] [2020-10-12 16:11:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:47,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:47,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:47,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:47,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:48,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:48,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:48,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:48,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-12 16:11:48,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:11:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:11:48,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:48,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:48,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:48,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:48,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:48,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:48,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:48,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:11:48,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502436351] [2020-10-12 16:11:48,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:48,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:11:48,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291194212] [2020-10-12 16:11:48,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:11:48,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:11:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:48,703 INFO L87 Difference]: Start difference. First operand 119 states and 164 transitions. Second operand 11 states. [2020-10-12 16:11:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:49,018 INFO L93 Difference]: Finished difference Result 154 states and 210 transitions. [2020-10-12 16:11:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:49,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-12 16:11:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:49,021 INFO L225 Difference]: With dead ends: 154 [2020-10-12 16:11:49,021 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 16:11:49,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 16:11:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2020-10-12 16:11:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 16:11:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2020-10-12 16:11:49,031 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 190 transitions. Word has length 24 [2020-10-12 16:11:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:49,031 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 190 transitions. [2020-10-12 16:11:49,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:11:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 190 transitions. [2020-10-12 16:11:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:49,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:49,033 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:49,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:11:49,033 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:49,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558835, now seen corresponding path program 9 times [2020-10-12 16:11:49,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:49,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949205853] [2020-10-12 16:11:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:49,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:49,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:49,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:49,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-12 16:11:49,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:11:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:11:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:49,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:49,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:49,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:49,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:49,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:49,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:49,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949205853] [2020-10-12 16:11:49,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:49,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:11:49,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014660879] [2020-10-12 16:11:49,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:11:49,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:11:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:49,972 INFO L87 Difference]: Start difference. First operand 137 states and 190 transitions. Second operand 13 states. [2020-10-12 16:11:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:50,394 INFO L93 Difference]: Finished difference Result 266 states and 395 transitions. [2020-10-12 16:11:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:11:50,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-12 16:11:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:50,396 INFO L225 Difference]: With dead ends: 266 [2020-10-12 16:11:50,397 INFO L226 Difference]: Without dead ends: 243 [2020-10-12 16:11:50,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-12 16:11:50,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 146. [2020-10-12 16:11:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 16:11:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2020-10-12 16:11:50,407 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 24 [2020-10-12 16:11:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:50,408 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2020-10-12 16:11:50,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:11:50,408 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2020-10-12 16:11:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:50,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:50,409 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:50,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:11:50,409 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 291494704, now seen corresponding path program 4 times [2020-10-12 16:11:50,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:50,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914876421] [2020-10-12 16:11:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:50,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:51,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:51,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:51,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-12 16:11:51,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:11:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:11:51,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:51,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:51,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:51,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:51,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:51,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:51,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:51,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:51,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914876421] [2020-10-12 16:11:51,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:51,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:51,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876325316] [2020-10-12 16:11:51,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:51,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:51,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:51,479 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand 10 states. [2020-10-12 16:11:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:51,705 INFO L93 Difference]: Finished difference Result 185 states and 259 transitions. [2020-10-12 16:11:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:51,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 16:11:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:51,707 INFO L225 Difference]: With dead ends: 185 [2020-10-12 16:11:51,707 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 16:11:51,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:11:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 16:11:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 140. [2020-10-12 16:11:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 16:11:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 196 transitions. [2020-10-12 16:11:51,717 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 196 transitions. Word has length 25 [2020-10-12 16:11:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:51,718 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 196 transitions. [2020-10-12 16:11:51,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 196 transitions. [2020-10-12 16:11:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:51,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:51,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:51,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:11:51,719 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1819941134, now seen corresponding path program 5 times [2020-10-12 16:11:51,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:51,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461360823] [2020-10-12 16:11:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:51,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:52,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:52,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-12 16:11:52,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:52,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:52,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:52,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:52,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:52,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:52,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:52,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:11:52,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461360823] [2020-10-12 16:11:52,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:52,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:52,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058870716] [2020-10-12 16:11:52,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:52,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:52,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:52,576 INFO L87 Difference]: Start difference. First operand 140 states and 196 transitions. Second operand 7 states. [2020-10-12 16:11:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:56,126 INFO L93 Difference]: Finished difference Result 206 states and 304 transitions. [2020-10-12 16:11:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:56,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-12 16:11:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:56,130 INFO L225 Difference]: With dead ends: 206 [2020-10-12 16:11:56,130 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 16:11:56,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 16:11:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 164. [2020-10-12 16:11:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 16:11:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 232 transitions. [2020-10-12 16:11:56,149 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 232 transitions. Word has length 25 [2020-10-12 16:11:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:56,155 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 232 transitions. [2020-10-12 16:11:56,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 232 transitions. [2020-10-12 16:11:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:56,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:56,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:56,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:11:56,156 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 417112735, now seen corresponding path program 4 times [2020-10-12 16:11:56,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:56,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442375446] [2020-10-12 16:11:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:57,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-12 16:11:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:11:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:11:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:59,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:59,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:59,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:59,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:59,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:59,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:59,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:59,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:59,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:11:59,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442375446] [2020-10-12 16:11:59,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:59,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:59,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239489020] [2020-10-12 16:11:59,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:59,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2020-10-12 16:11:59,221 INFO L87 Difference]: Start difference. First operand 164 states and 232 transitions. Second operand 7 states. [2020-10-12 16:11:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:59,464 INFO L93 Difference]: Finished difference Result 275 states and 356 transitions. [2020-10-12 16:11:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:59,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-12 16:11:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:59,466 INFO L225 Difference]: With dead ends: 275 [2020-10-12 16:11:59,466 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 16:11:59,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=61, Unknown=1, NotChecked=0, Total=90 [2020-10-12 16:11:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 16:11:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 181. [2020-10-12 16:11:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 16:11:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 256 transitions. [2020-10-12 16:11:59,481 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 256 transitions. Word has length 25 [2020-10-12 16:11:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:59,484 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 256 transitions. [2020-10-12 16:11:59,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 256 transitions. [2020-10-12 16:11:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:59,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:59,485 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:59,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:11:59,486 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash 206677872, now seen corresponding path program 5 times [2020-10-12 16:11:59,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:59,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519403961] [2020-10-12 16:11:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:00,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:12:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:12:01,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:01,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:01,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:01,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:01,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:01,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:01,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:01,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:01,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:12:01,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519403961] [2020-10-12 16:12:01,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:01,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:01,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990845519] [2020-10-12 16:12:01,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:01,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:01,573 INFO L87 Difference]: Start difference. First operand 181 states and 256 transitions. Second operand 10 states. [2020-10-12 16:12:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:02,624 INFO L93 Difference]: Finished difference Result 310 states and 407 transitions. [2020-10-12 16:12:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:12:02,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 16:12:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:02,628 INFO L225 Difference]: With dead ends: 310 [2020-10-12 16:12:02,628 INFO L226 Difference]: Without dead ends: 279 [2020-10-12 16:12:02,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:12:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-12 16:12:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 177. [2020-10-12 16:12:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 16:12:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 236 transitions. [2020-10-12 16:12:02,656 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 236 transitions. Word has length 25 [2020-10-12 16:12:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:02,657 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 236 transitions. [2020-10-12 16:12:02,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:12:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 236 transitions. [2020-10-12 16:12:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:12:02,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:02,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:02,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:12:02,658 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash 581647966, now seen corresponding path program 6 times [2020-10-12 16:12:02,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:02,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069488814] [2020-10-12 16:12:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:02,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:02,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:03,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:03,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:12:03,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:03,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 16:12:03,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:03,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:12:03,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:03,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:03,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:03,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:03,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:03,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:03,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:03,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:03,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:03,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069488814] [2020-10-12 16:12:03,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:03,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:03,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398920861] [2020-10-12 16:12:03,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:03,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:03,372 INFO L87 Difference]: Start difference. First operand 177 states and 236 transitions. Second operand 12 states. [2020-10-12 16:12:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:03,738 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2020-10-12 16:12:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:12:03,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 16:12:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:03,740 INFO L225 Difference]: With dead ends: 242 [2020-10-12 16:12:03,740 INFO L226 Difference]: Without dead ends: 229 [2020-10-12 16:12:03,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-12 16:12:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 177. [2020-10-12 16:12:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 16:12:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 235 transitions. [2020-10-12 16:12:03,758 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 235 transitions. Word has length 25 [2020-10-12 16:12:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:03,758 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 235 transitions. [2020-10-12 16:12:03,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 235 transitions. [2020-10-12 16:12:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:12:03,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:03,760 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:03,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:12:03,760 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1925681058, now seen corresponding path program 10 times [2020-10-12 16:12:03,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:03,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925943456] [2020-10-12 16:12:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:03,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:03,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:04,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:04,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:12:04,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-12 16:12:04,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:12:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:12:04,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:04,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:04,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:04,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:04,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:04,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:04,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:04,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:04,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925943456] [2020-10-12 16:12:04,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:04,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:04,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005954051] [2020-10-12 16:12:04,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:04,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:04,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:04,549 INFO L87 Difference]: Start difference. First operand 177 states and 235 transitions. Second operand 14 states. [2020-10-12 16:12:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:05,162 INFO L93 Difference]: Finished difference Result 367 states and 521 transitions. [2020-10-12 16:12:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:12:05,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-12 16:12:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:05,165 INFO L225 Difference]: With dead ends: 367 [2020-10-12 16:12:05,165 INFO L226 Difference]: Without dead ends: 332 [2020-10-12 16:12:05,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-12 16:12:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 188. [2020-10-12 16:12:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-12 16:12:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 251 transitions. [2020-10-12 16:12:05,195 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 251 transitions. Word has length 25 [2020-10-12 16:12:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:05,195 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 251 transitions. [2020-10-12 16:12:05,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:12:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 251 transitions. [2020-10-12 16:12:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:05,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:05,196 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:05,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:12:05,197 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1433360590, now seen corresponding path program 2 times [2020-10-12 16:12:05,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:05,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726145888] [2020-10-12 16:12:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:12:05,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:05,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:05,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:05,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:12:05,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726145888] [2020-10-12 16:12:05,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:05,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:05,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376966719] [2020-10-12 16:12:05,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:05,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:05,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:05,654 INFO L87 Difference]: Start difference. First operand 188 states and 251 transitions. Second operand 11 states. [2020-10-12 16:12:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:05,829 INFO L93 Difference]: Finished difference Result 194 states and 256 transitions. [2020-10-12 16:12:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:12:05,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-12 16:12:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:05,831 INFO L225 Difference]: With dead ends: 194 [2020-10-12 16:12:05,831 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 16:12:05,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 16:12:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-12 16:12:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 16:12:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 236 transitions. [2020-10-12 16:12:05,852 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 236 transitions. Word has length 26 [2020-10-12 16:12:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:05,852 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 236 transitions. [2020-10-12 16:12:05,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 236 transitions. [2020-10-12 16:12:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:05,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:05,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:05,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:12:05,854 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1430774962, now seen corresponding path program 6 times [2020-10-12 16:12:05,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:05,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753201247] [2020-10-12 16:12:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:05,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:05,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:06,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:07,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:08,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:08,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:12:08,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2293 [2020-10-12 16:12:08,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:12:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:08,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:12:08,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:12:08,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:08,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:08,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:08,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:08,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:08,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:08,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753201247] [2020-10-12 16:12:08,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:08,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:08,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308473708] [2020-10-12 16:12:08,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:08,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:08,340 INFO L87 Difference]: Start difference. First operand 175 states and 236 transitions. Second operand 12 states. [2020-10-12 16:12:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:08,766 INFO L93 Difference]: Finished difference Result 224 states and 299 transitions. [2020-10-12 16:12:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:12:08,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-12 16:12:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:08,768 INFO L225 Difference]: With dead ends: 224 [2020-10-12 16:12:08,768 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 16:12:08,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:12:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 16:12:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2020-10-12 16:12:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 16:12:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 234 transitions. [2020-10-12 16:12:08,783 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 234 transitions. Word has length 26 [2020-10-12 16:12:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:08,783 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 234 transitions. [2020-10-12 16:12:08,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 234 transitions. [2020-10-12 16:12:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:08,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:08,784 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:08,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:12:08,784 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1419437267, now seen corresponding path program 11 times [2020-10-12 16:12:08,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:08,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350788872] [2020-10-12 16:12:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:09,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:09,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:09,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-12 16:12:09,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:12:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:12:09,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:09,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:09,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:09,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:09,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:09,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:09,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:09,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350788872] [2020-10-12 16:12:09,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:09,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:12:09,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836336210] [2020-10-12 16:12:09,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:12:09,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:12:09,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:09,657 INFO L87 Difference]: Start difference. First operand 175 states and 234 transitions. Second operand 15 states. [2020-10-12 16:12:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:10,323 INFO L93 Difference]: Finished difference Result 344 states and 499 transitions. [2020-10-12 16:12:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:12:10,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-12 16:12:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:10,325 INFO L225 Difference]: With dead ends: 344 [2020-10-12 16:12:10,326 INFO L226 Difference]: Without dead ends: 309 [2020-10-12 16:12:10,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-12 16:12:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 186. [2020-10-12 16:12:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 16:12:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 250 transitions. [2020-10-12 16:12:10,359 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 250 transitions. Word has length 26 [2020-10-12 16:12:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:10,360 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 250 transitions. [2020-10-12 16:12:10,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:12:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 250 transitions. [2020-10-12 16:12:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:10,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:10,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:10,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:12:10,362 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -305181938, now seen corresponding path program 7 times [2020-10-12 16:12:10,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:10,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398634405] [2020-10-12 16:12:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:10,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:10,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:10,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:10,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-12 16:12:10,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:10,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:12:10,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 16:12:10,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:12:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:10,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:10,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:10,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:10,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:10,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:10,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:10,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:10,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:10,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:10,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:12:10,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398634405] [2020-10-12 16:12:10,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:10,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:12:10,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649830025] [2020-10-12 16:12:10,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:10,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:10,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:10,716 INFO L87 Difference]: Start difference. First operand 186 states and 250 transitions. Second operand 7 states. [2020-10-12 16:12:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:10,958 INFO L93 Difference]: Finished difference Result 299 states and 365 transitions. [2020-10-12 16:12:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:12:10,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-12 16:12:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:10,961 INFO L225 Difference]: With dead ends: 299 [2020-10-12 16:12:10,961 INFO L226 Difference]: Without dead ends: 294 [2020-10-12 16:12:10,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:10,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-12 16:12:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 185. [2020-10-12 16:12:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 16:12:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 247 transitions. [2020-10-12 16:12:10,979 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 247 transitions. Word has length 27 [2020-10-12 16:12:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:10,980 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 247 transitions. [2020-10-12 16:12:10,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:10,980 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 247 transitions. [2020-10-12 16:12:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:10,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:10,981 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:10,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:12:10,981 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1744378241, now seen corresponding path program 5 times [2020-10-12 16:12:10,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:10,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301206832] [2020-10-12 16:12:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:10,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:12:11,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:11,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:12:11,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:13,748 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-12 16:12:15,898 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-12 16:12:16,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:16,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:16,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:16,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:16,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:16,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:16,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:12:16,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301206832] [2020-10-12 16:12:16,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:16,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:12:16,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500240905] [2020-10-12 16:12:16,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:12:16,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:12:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:16,017 INFO L87 Difference]: Start difference. First operand 185 states and 247 transitions. Second operand 13 states. [2020-10-12 16:12:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:16,548 INFO L93 Difference]: Finished difference Result 200 states and 264 transitions. [2020-10-12 16:12:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:16,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 16:12:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:16,550 INFO L225 Difference]: With dead ends: 200 [2020-10-12 16:12:16,550 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 16:12:16,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 16:12:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2020-10-12 16:12:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 16:12:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 245 transitions. [2020-10-12 16:12:16,573 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 245 transitions. Word has length 27 [2020-10-12 16:12:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:16,573 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 245 transitions. [2020-10-12 16:12:16,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:12:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 245 transitions. [2020-10-12 16:12:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:16,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:16,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:16,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:12:16,575 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1692858626, now seen corresponding path program 7 times [2020-10-12 16:12:16,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:16,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102753102] [2020-10-12 16:12:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:16,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:17,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:19,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:19,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:19,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2483 [2020-10-12 16:12:19,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:19,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:12:19,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:19,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:12:19,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:19,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:19,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:19,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:19,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:19,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102753102] [2020-10-12 16:12:19,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:19,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:12:19,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343917090] [2020-10-12 16:12:19,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:12:19,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:12:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:19,709 INFO L87 Difference]: Start difference. First operand 185 states and 245 transitions. Second operand 13 states. [2020-10-12 16:12:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:20,181 INFO L93 Difference]: Finished difference Result 219 states and 292 transitions. [2020-10-12 16:12:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:20,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 16:12:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:20,184 INFO L225 Difference]: With dead ends: 219 [2020-10-12 16:12:20,184 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 16:12:20,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 16:12:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 200. [2020-10-12 16:12:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 16:12:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-10-12 16:12:20,203 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 27 [2020-10-12 16:12:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:20,203 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-10-12 16:12:20,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:12:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-10-12 16:12:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:20,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:20,205 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:20,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:12:20,205 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash 301632782, now seen corresponding path program 8 times [2020-10-12 16:12:20,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:20,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080591257] [2020-10-12 16:12:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:21,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:21,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-12 16:12:21,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:12:21,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:21,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:12:21,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:21,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:21,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:21,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:21,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:21,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080591257] [2020-10-12 16:12:21,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:21,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:21,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857898572] [2020-10-12 16:12:21,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:21,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:21,355 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 14 states. [2020-10-12 16:12:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:21,777 INFO L93 Difference]: Finished difference Result 268 states and 358 transitions. [2020-10-12 16:12:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:21,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-12 16:12:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:21,780 INFO L225 Difference]: With dead ends: 268 [2020-10-12 16:12:21,780 INFO L226 Difference]: Without dead ends: 254 [2020-10-12 16:12:21,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-12 16:12:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 200. [2020-10-12 16:12:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 16:12:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 269 transitions. [2020-10-12 16:12:21,801 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 269 transitions. Word has length 27 [2020-10-12 16:12:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:21,801 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 269 transitions. [2020-10-12 16:12:21,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:12:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 269 transitions. [2020-10-12 16:12:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:21,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:21,803 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:21,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:12:21,803 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1389218366, now seen corresponding path program 12 times [2020-10-12 16:12:21,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:21,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532290578] [2020-10-12 16:12:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:22,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:22,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-12 16:12:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:12:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:12:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:22,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:22,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532290578] [2020-10-12 16:12:22,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:22,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:12:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308553780] [2020-10-12 16:12:22,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:12:22,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:12:22,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:22,370 INFO L87 Difference]: Start difference. First operand 200 states and 269 transitions. Second operand 16 states. [2020-10-12 16:12:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:23,108 INFO L93 Difference]: Finished difference Result 352 states and 512 transitions. [2020-10-12 16:12:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:12:23,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-12 16:12:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:23,111 INFO L225 Difference]: With dead ends: 352 [2020-10-12 16:12:23,111 INFO L226 Difference]: Without dead ends: 317 [2020-10-12 16:12:23,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-12 16:12:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 211. [2020-10-12 16:12:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 16:12:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 285 transitions. [2020-10-12 16:12:23,130 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 285 transitions. Word has length 27 [2020-10-12 16:12:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:23,130 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 285 transitions. [2020-10-12 16:12:23,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:12:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 285 transitions. [2020-10-12 16:12:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:23,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:23,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:12:23,132 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:23,132 INFO L82 PathProgramCache]: Analyzing trace with hash 499356334, now seen corresponding path program 9 times [2020-10-12 16:12:23,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:23,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246024707] [2020-10-12 16:12:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:23,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:24,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:24,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:24,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-12 16:12:24,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:12:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:24,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:24,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:24,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:24,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:24,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:24,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:24,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:24,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:12:24,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246024707] [2020-10-12 16:12:24,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:24,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:12:24,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133978007] [2020-10-12 16:12:24,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:12:24,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:24,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:12:24,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:12:24,829 INFO L87 Difference]: Start difference. First operand 211 states and 285 transitions. Second operand 8 states. [2020-10-12 16:12:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:27,056 INFO L93 Difference]: Finished difference Result 279 states and 381 transitions. [2020-10-12 16:12:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:27,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 16:12:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:27,059 INFO L225 Difference]: With dead ends: 279 [2020-10-12 16:12:27,059 INFO L226 Difference]: Without dead ends: 268 [2020-10-12 16:12:27,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-12 16:12:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 236. [2020-10-12 16:12:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-12 16:12:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 317 transitions. [2020-10-12 16:12:27,082 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 317 transitions. Word has length 28 [2020-10-12 16:12:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:27,082 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 317 transitions. [2020-10-12 16:12:27,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:12:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 317 transitions. [2020-10-12 16:12:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:27,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:27,083 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:27,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:12:27,083 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash -903472065, now seen corresponding path program 6 times [2020-10-12 16:12:27,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:27,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967203427] [2020-10-12 16:12:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:27,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:27,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:28,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:12:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:28,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:28,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:28,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:28,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:28,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:28,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:12:28,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967203427] [2020-10-12 16:12:28,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:28,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:12:28,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230440529] [2020-10-12 16:12:28,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:12:28,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:28,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:12:28,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:12:28,324 INFO L87 Difference]: Start difference. First operand 236 states and 317 transitions. Second operand 9 states. [2020-10-12 16:12:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:29,187 INFO L93 Difference]: Finished difference Result 441 states and 538 transitions. [2020-10-12 16:12:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:12:29,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-12 16:12:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:29,191 INFO L225 Difference]: With dead ends: 441 [2020-10-12 16:12:29,191 INFO L226 Difference]: Without dead ends: 436 [2020-10-12 16:12:29,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-12 16:12:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 249. [2020-10-12 16:12:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 16:12:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 335 transitions. [2020-10-12 16:12:29,225 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 335 transitions. Word has length 28 [2020-10-12 16:12:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:29,225 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 335 transitions. [2020-10-12 16:12:29,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:12:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 335 transitions. [2020-10-12 16:12:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:29,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:29,226 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:29,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:12:29,227 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:29,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1227517618, now seen corresponding path program 8 times [2020-10-12 16:12:29,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:29,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239873363] [2020-10-12 16:12:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:29,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:32,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:32,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:32,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2971 [2020-10-12 16:12:32,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 16:12:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:12:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:32,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239873363] [2020-10-12 16:12:32,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:32,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:32,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884441696] [2020-10-12 16:12:32,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:32,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:32,381 INFO L87 Difference]: Start difference. First operand 249 states and 335 transitions. Second operand 12 states. [2020-10-12 16:12:36,381 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 24 [2020-10-12 16:12:41,252 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-12 16:12:42,394 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:12:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:42,764 INFO L93 Difference]: Finished difference Result 473 states and 582 transitions. [2020-10-12 16:12:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:12:42,770 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 16:12:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:42,772 INFO L225 Difference]: With dead ends: 473 [2020-10-12 16:12:42,772 INFO L226 Difference]: Without dead ends: 452 [2020-10-12 16:12:42,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:12:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-12 16:12:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 246. [2020-10-12 16:12:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-12 16:12:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 326 transitions. [2020-10-12 16:12:42,798 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 326 transitions. Word has length 28 [2020-10-12 16:12:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:42,798 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 326 transitions. [2020-10-12 16:12:42,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 326 transitions. [2020-10-12 16:12:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:42,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:42,800 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:42,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:12:42,800 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1736770227, now seen corresponding path program 13 times [2020-10-12 16:12:42,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:42,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942056893] [2020-10-12 16:12:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:42,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:43,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:43,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:43,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-12 16:12:43,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:12:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:43,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:43,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:43,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942056893] [2020-10-12 16:12:43,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:43,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:12:43,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875933420] [2020-10-12 16:12:43,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:12:43,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:43,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:12:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:43,940 INFO L87 Difference]: Start difference. First operand 246 states and 326 transitions. Second operand 17 states. [2020-10-12 16:12:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:44,765 INFO L93 Difference]: Finished difference Result 473 states and 673 transitions. [2020-10-12 16:12:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:12:44,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-12 16:12:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:44,767 INFO L225 Difference]: With dead ends: 473 [2020-10-12 16:12:44,768 INFO L226 Difference]: Without dead ends: 430 [2020-10-12 16:12:44,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:12:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-12 16:12:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 259. [2020-10-12 16:12:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 16:12:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 345 transitions. [2020-10-12 16:12:44,801 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 345 transitions. Word has length 28 [2020-10-12 16:12:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:44,801 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 345 transitions. [2020-10-12 16:12:44,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:12:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 345 transitions. [2020-10-12 16:12:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:44,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:44,802 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:44,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:12:44,802 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:44,803 INFO L82 PathProgramCache]: Analyzing trace with hash -920955728, now seen corresponding path program 10 times [2020-10-12 16:12:44,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:44,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948261994] [2020-10-12 16:12:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:44,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:44,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:45,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:12:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:46,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:46,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948261994] [2020-10-12 16:12:46,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:46,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:46,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715932941] [2020-10-12 16:12:46,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:46,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:46,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:46,154 INFO L87 Difference]: Start difference. First operand 259 states and 345 transitions. Second operand 14 states. [2020-10-12 16:12:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:46,644 INFO L93 Difference]: Finished difference Result 331 states and 434 transitions. [2020-10-12 16:12:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:12:46,644 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 16:12:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:46,646 INFO L225 Difference]: With dead ends: 331 [2020-10-12 16:12:46,646 INFO L226 Difference]: Without dead ends: 316 [2020-10-12 16:12:46,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:12:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-12 16:12:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2020-10-12 16:12:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 16:12:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 344 transitions. [2020-10-12 16:12:46,671 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 344 transitions. Word has length 29 [2020-10-12 16:12:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:46,671 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 344 transitions. [2020-10-12 16:12:46,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:12:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 344 transitions. [2020-10-12 16:12:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:46,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:46,673 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:46,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:12:46,673 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1379002128, now seen corresponding path program 9 times [2020-10-12 16:12:46,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:46,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705660851] [2020-10-12 16:12:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:49,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:12:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-12 16:12:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:12:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:12:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:49,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:49,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:49,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:49,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705660851] [2020-10-12 16:12:49,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:49,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:49,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806813797] [2020-10-12 16:12:49,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:49,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:49,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:49,722 INFO L87 Difference]: Start difference. First operand 259 states and 344 transitions. Second operand 14 states. [2020-10-12 16:12:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:50,364 INFO L93 Difference]: Finished difference Result 323 states and 425 transitions. [2020-10-12 16:12:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:12:50,365 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 16:12:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:50,366 INFO L225 Difference]: With dead ends: 323 [2020-10-12 16:12:50,366 INFO L226 Difference]: Without dead ends: 300 [2020-10-12 16:12:50,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:12:50,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-12 16:12:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 259. [2020-10-12 16:12:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 16:12:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 342 transitions. [2020-10-12 16:12:50,387 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 342 transitions. Word has length 29 [2020-10-12 16:12:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:50,388 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 342 transitions. [2020-10-12 16:12:50,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:12:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 342 transitions. [2020-10-12 16:12:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:50,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:50,389 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:50,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:12:50,389 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -718957538, now seen corresponding path program 11 times [2020-10-12 16:12:50,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:50,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087419779] [2020-10-12 16:12:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:50,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:12:51,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:12:51,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:51,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:51,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087419779] [2020-10-12 16:12:51,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:12:51,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465549195] [2020-10-12 16:12:51,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:12:51,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:12:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:51,493 INFO L87 Difference]: Start difference. First operand 259 states and 342 transitions. Second operand 16 states. [2020-10-12 16:12:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,006 INFO L93 Difference]: Finished difference Result 351 states and 455 transitions. [2020-10-12 16:12:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:52,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-12 16:12:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,008 INFO L225 Difference]: With dead ends: 351 [2020-10-12 16:12:52,008 INFO L226 Difference]: Without dead ends: 336 [2020-10-12 16:12:52,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:12:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-12 16:12:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 259. [2020-10-12 16:12:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 16:12:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 341 transitions. [2020-10-12 16:12:52,035 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 341 transitions. Word has length 29 [2020-10-12 16:12:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,035 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 341 transitions. [2020-10-12 16:12:52,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:12:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 341 transitions. [2020-10-12 16:12:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:52,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,037 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:12:52,037 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 141831198, now seen corresponding path program 14 times [2020-10-12 16:12:52,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431368687] [2020-10-12 16:12:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:12:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:12:52,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:53,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:53,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:53,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:53,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:53,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:53,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:53,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431368687] [2020-10-12 16:12:53,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:53,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:12:53,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147399559] [2020-10-12 16:12:53,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:12:53,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:53,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:12:53,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:12:53,270 INFO L87 Difference]: Start difference. First operand 259 states and 341 transitions. Second operand 18 states. [2020-10-12 16:12:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:54,214 INFO L93 Difference]: Finished difference Result 499 states and 710 transitions. [2020-10-12 16:12:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:12:54,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-12 16:12:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:54,218 INFO L225 Difference]: With dead ends: 499 [2020-10-12 16:12:54,218 INFO L226 Difference]: Without dead ends: 456 [2020-10-12 16:12:54,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:12:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-12 16:12:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 272. [2020-10-12 16:12:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-12 16:12:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 360 transitions. [2020-10-12 16:12:54,246 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 360 transitions. Word has length 29 [2020-10-12 16:12:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:54,246 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 360 transitions. [2020-10-12 16:12:54,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:12:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 360 transitions. [2020-10-12 16:12:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:54,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:54,247 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:54,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:12:54,247 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1923144878, now seen corresponding path program 12 times [2020-10-12 16:12:54,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:54,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010961192] [2020-10-12 16:12:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:55,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:55,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:55,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-12 16:12:55,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:55,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:12:55,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:55,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:55,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:55,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:55,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 16:12:55,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010961192] [2020-10-12 16:12:55,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:55,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:12:55,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052190171] [2020-10-12 16:12:55,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:55,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:55,337 INFO L87 Difference]: Start difference. First operand 272 states and 360 transitions. Second operand 7 states. [2020-10-12 16:12:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:55,957 INFO L93 Difference]: Finished difference Result 324 states and 432 transitions. [2020-10-12 16:12:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:12:55,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-12 16:12:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:55,959 INFO L225 Difference]: With dead ends: 324 [2020-10-12 16:12:55,960 INFO L226 Difference]: Without dead ends: 313 [2020-10-12 16:12:55,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-12 16:12:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2020-10-12 16:12:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-12 16:12:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 375 transitions. [2020-10-12 16:12:55,979 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 375 transitions. Word has length 30 [2020-10-12 16:12:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:55,979 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 375 transitions. [2020-10-12 16:12:55,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 375 transitions. [2020-10-12 16:12:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:55,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:55,981 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:55,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:12:55,981 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash 685135134, now seen corresponding path program 10 times [2020-10-12 16:12:55,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:55,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734717353] [2020-10-12 16:12:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:57,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:12:57,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:57,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:57,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:57,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:57,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:57,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:12:57,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734717353] [2020-10-12 16:12:57,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:57,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:57,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192088327] [2020-10-12 16:12:57,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:57,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:57,929 INFO L87 Difference]: Start difference. First operand 284 states and 375 transitions. Second operand 11 states. [2020-10-12 16:12:58,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:58,324 INFO L93 Difference]: Finished difference Result 322 states and 427 transitions. [2020-10-12 16:12:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:12:58,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 16:12:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:58,327 INFO L225 Difference]: With dead ends: 322 [2020-10-12 16:12:58,327 INFO L226 Difference]: Without dead ends: 317 [2020-10-12 16:12:58,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-12 16:12:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 307. [2020-10-12 16:12:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 16:12:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 412 transitions. [2020-10-12 16:12:58,356 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 412 transitions. Word has length 30 [2020-10-12 16:12:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:58,356 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 412 transitions. [2020-10-12 16:12:58,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 412 transitions. [2020-10-12 16:12:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:58,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:58,358 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:58,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:12:58,358 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1751066771, now seen corresponding path program 15 times [2020-10-12 16:12:58,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:58,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578555492] [2020-10-12 16:12:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:58,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:59,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:12:59,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:59,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:59,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:59,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:59,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:59,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:59,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:59,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578555492] [2020-10-12 16:12:59,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:59,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:12:59,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560582060] [2020-10-12 16:12:59,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:12:59,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:59,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:12:59,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:12:59,549 INFO L87 Difference]: Start difference. First operand 307 states and 412 transitions. Second operand 19 states. [2020-10-12 16:13:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:00,526 INFO L93 Difference]: Finished difference Result 584 states and 840 transitions. [2020-10-12 16:13:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:13:00,527 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-12 16:13:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:00,529 INFO L225 Difference]: With dead ends: 584 [2020-10-12 16:13:00,529 INFO L226 Difference]: Without dead ends: 529 [2020-10-12 16:13:00,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:13:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-12 16:13:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 320. [2020-10-12 16:13:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-12 16:13:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 431 transitions. [2020-10-12 16:13:00,565 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 431 transitions. Word has length 30 [2020-10-12 16:13:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:00,566 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 431 transitions. [2020-10-12 16:13:00,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:13:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 431 transitions. [2020-10-12 16:13:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:00,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:00,567 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:00,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:13:00,568 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1193970510, now seen corresponding path program 3 times [2020-10-12 16:13:00,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:00,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597563561] [2020-10-12 16:13:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:01,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:01,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:01,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:01,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:01,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:13:01,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597563561] [2020-10-12 16:13:01,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:01,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:13:01,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879254492] [2020-10-12 16:13:01,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:13:01,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:13:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:01,135 INFO L87 Difference]: Start difference. First operand 320 states and 431 transitions. Second operand 10 states. [2020-10-12 16:13:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:01,420 INFO L93 Difference]: Finished difference Result 330 states and 441 transitions. [2020-10-12 16:13:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:13:01,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 16:13:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:01,422 INFO L225 Difference]: With dead ends: 330 [2020-10-12 16:13:01,422 INFO L226 Difference]: Without dead ends: 307 [2020-10-12 16:13:01,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-12 16:13:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-10-12 16:13:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 16:13:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 417 transitions. [2020-10-12 16:13:01,451 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 417 transitions. Word has length 31 [2020-10-12 16:13:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:01,452 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 417 transitions. [2020-10-12 16:13:01,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:13:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 417 transitions. [2020-10-12 16:13:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:01,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:01,453 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:01,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:13:01,453 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash 926315262, now seen corresponding path program 13 times [2020-10-12 16:13:01,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:01,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394858709] [2020-10-12 16:13:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:01,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:13:01,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:01,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 16:13:01,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394858709] [2020-10-12 16:13:01,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:01,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:13:01,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268502642] [2020-10-12 16:13:01,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:13:01,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:13:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:01,762 INFO L87 Difference]: Start difference. First operand 307 states and 417 transitions. Second operand 7 states. [2020-10-12 16:13:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:02,308 INFO L93 Difference]: Finished difference Result 561 states and 684 transitions. [2020-10-12 16:13:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:13:02,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-12 16:13:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:02,318 INFO L225 Difference]: With dead ends: 561 [2020-10-12 16:13:02,318 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 16:13:02,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 16:13:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 306. [2020-10-12 16:13:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-12 16:13:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 413 transitions. [2020-10-12 16:13:02,353 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 413 transitions. Word has length 31 [2020-10-12 16:13:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:02,355 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 413 transitions. [2020-10-12 16:13:02,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:13:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 413 transitions. [2020-10-12 16:13:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:02,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:02,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:02,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:13:02,359 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2141925570, now seen corresponding path program 7 times [2020-10-12 16:13:02,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:02,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200423580] [2020-10-12 16:13:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:02,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:13:03,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:03,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:03,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:03,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:03,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:03,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:03,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:03,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:03,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 16:13:03,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200423580] [2020-10-12 16:13:03,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:03,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:13:03,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085174351] [2020-10-12 16:13:03,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:13:03,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:13:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:13:03,367 INFO L87 Difference]: Start difference. First operand 306 states and 413 transitions. Second operand 15 states. [2020-10-12 16:13:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:03,833 INFO L93 Difference]: Finished difference Result 324 states and 434 transitions. [2020-10-12 16:13:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:13:03,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 16:13:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:03,835 INFO L225 Difference]: With dead ends: 324 [2020-10-12 16:13:03,835 INFO L226 Difference]: Without dead ends: 307 [2020-10-12 16:13:03,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:13:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-12 16:13:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 301. [2020-10-12 16:13:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-12 16:13:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 405 transitions. [2020-10-12 16:13:03,870 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 405 transitions. Word has length 31 [2020-10-12 16:13:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:03,870 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 405 transitions. [2020-10-12 16:13:03,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:13:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 405 transitions. [2020-10-12 16:13:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:03,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:03,871 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:03,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:13:03,872 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1202718862, now seen corresponding path program 14 times [2020-10-12 16:13:03,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:03,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774575310] [2020-10-12 16:13:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:03,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:05,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:05,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:05,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1974 [2020-10-12 16:13:05,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:13:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:13:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:13:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:06,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:06,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:06,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:06,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:06,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 16:13:06,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774575310] [2020-10-12 16:13:06,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:06,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:13:06,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712098655] [2020-10-12 16:13:06,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:13:06,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:13:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:13:06,035 INFO L87 Difference]: Start difference. First operand 301 states and 405 transitions. Second operand 11 states. [2020-10-12 16:13:06,942 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 12 [2020-10-12 16:13:09,575 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2020-10-12 16:13:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:09,785 INFO L93 Difference]: Finished difference Result 389 states and 527 transitions. [2020-10-12 16:13:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:13:09,786 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-12 16:13:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:09,787 INFO L225 Difference]: With dead ends: 389 [2020-10-12 16:13:09,787 INFO L226 Difference]: Without dead ends: 374 [2020-10-12 16:13:09,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-12 16:13:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2020-10-12 16:13:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-12 16:13:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 443 transitions. [2020-10-12 16:13:09,832 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 443 transitions. Word has length 31 [2020-10-12 16:13:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:09,832 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 443 transitions. [2020-10-12 16:13:09,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:13:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 443 transitions. [2020-10-12 16:13:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:09,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:09,834 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:09,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:13:09,834 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash -200109537, now seen corresponding path program 8 times [2020-10-12 16:13:09,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:09,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855771411] [2020-10-12 16:13:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:09,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:09,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1684 [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:11,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:11,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:11,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:11,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:11,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:11,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:11,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:11,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 16:13:11,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855771411] [2020-10-12 16:13:11,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:11,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:13:11,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830731189] [2020-10-12 16:13:11,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:13:11,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:13:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:13:11,795 INFO L87 Difference]: Start difference. First operand 332 states and 443 transitions. Second operand 11 states. [2020-10-12 16:13:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:12,723 INFO L93 Difference]: Finished difference Result 692 states and 821 transitions. [2020-10-12 16:13:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:13:12,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-12 16:13:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:12,729 INFO L225 Difference]: With dead ends: 692 [2020-10-12 16:13:12,730 INFO L226 Difference]: Without dead ends: 687 [2020-10-12 16:13:12,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-12 16:13:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 352. [2020-10-12 16:13:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-12 16:13:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 470 transitions. [2020-10-12 16:13:12,793 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 470 transitions. Word has length 31 [2020-10-12 16:13:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:12,794 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 470 transitions. [2020-10-12 16:13:12,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:13:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 470 transitions. [2020-10-12 16:13:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:12,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:12,795 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:12,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:13:12,796 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash 248880816, now seen corresponding path program 11 times [2020-10-12 16:13:12,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:12,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045927600] [2020-10-12 16:13:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:13,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4681 [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:13:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:17,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:17,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:17,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:13:17,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045927600] [2020-10-12 16:13:17,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:17,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:13:17,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821411098] [2020-10-12 16:13:17,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:13:17,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:13:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:17,746 INFO L87 Difference]: Start difference. First operand 352 states and 470 transitions. Second operand 14 states. [2020-10-12 16:13:20,215 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:13:20,536 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:20,895 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:23,697 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-12 16:13:25,819 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 3))) (and (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (<= .cse0 c_main_~y~0) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 6)) 4294967296)) 4294967300)) (<= c_main_~y~0 .cse0))) is different from false [2020-10-12 16:13:28,135 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 24 [2020-10-12 16:13:30,033 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-12 16:13:34,846 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-12 16:13:35,546 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:36,439 INFO L93 Difference]: Finished difference Result 732 states and 871 transitions. [2020-10-12 16:13:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:13:36,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 16:13:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:36,442 INFO L225 Difference]: With dead ends: 732 [2020-10-12 16:13:36,442 INFO L226 Difference]: Without dead ends: 703 [2020-10-12 16:13:36,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=383, Invalid=2170, Unknown=1, NotChecked=98, Total=2652 [2020-10-12 16:13:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-12 16:13:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 345. [2020-10-12 16:13:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 16:13:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 454 transitions. [2020-10-12 16:13:36,483 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 454 transitions. Word has length 31 [2020-10-12 16:13:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:36,483 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 454 transitions. [2020-10-12 16:13:36,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:13:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 454 transitions. [2020-10-12 16:13:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:36,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:36,485 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:36,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:13:36,485 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:36,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1737292030, now seen corresponding path program 15 times [2020-10-12 16:13:36,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:36,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770108365] [2020-10-12 16:13:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:36,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:38,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:38,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:38,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-12 16:13:38,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:38,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:13:38,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:38,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:38,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:38,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:38,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:38,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:13:38,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770108365] [2020-10-12 16:13:38,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:38,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:13:38,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539821648] [2020-10-12 16:13:38,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:13:38,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:38,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:13:38,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:38,546 INFO L87 Difference]: Start difference. First operand 345 states and 454 transitions. Second operand 16 states. [2020-10-12 16:13:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:39,160 INFO L93 Difference]: Finished difference Result 444 states and 572 transitions. [2020-10-12 16:13:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:13:39,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-12 16:13:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:39,162 INFO L225 Difference]: With dead ends: 444 [2020-10-12 16:13:39,163 INFO L226 Difference]: Without dead ends: 426 [2020-10-12 16:13:39,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:13:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-12 16:13:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 345. [2020-10-12 16:13:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 16:13:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 453 transitions. [2020-10-12 16:13:39,199 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 453 transitions. Word has length 31 [2020-10-12 16:13:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:39,200 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 453 transitions. [2020-10-12 16:13:39,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:13:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 453 transitions. [2020-10-12 16:13:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:39,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:39,201 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:39,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:13:39,201 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1573584590, now seen corresponding path program 16 times [2020-10-12 16:13:39,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:39,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014048183] [2020-10-12 16:13:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:40,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:40,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1230 [2020-10-12 16:13:40,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:13:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:40,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:40,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:40,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:40,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:40,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:40,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:40,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:40,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:40,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014048183] [2020-10-12 16:13:40,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:40,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:13:40,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944739207] [2020-10-12 16:13:40,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:13:40,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:13:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:13:40,770 INFO L87 Difference]: Start difference. First operand 345 states and 453 transitions. Second operand 18 states. [2020-10-12 16:13:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:41,424 INFO L93 Difference]: Finished difference Result 469 states and 601 transitions. [2020-10-12 16:13:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:13:41,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-12 16:13:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:41,427 INFO L225 Difference]: With dead ends: 469 [2020-10-12 16:13:41,427 INFO L226 Difference]: Without dead ends: 450 [2020-10-12 16:13:41,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:13:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-12 16:13:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 345. [2020-10-12 16:13:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 16:13:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 452 transitions. [2020-10-12 16:13:41,466 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 452 transitions. Word has length 31 [2020-10-12 16:13:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:41,466 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 452 transitions. [2020-10-12 16:13:41,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:13:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 452 transitions. [2020-10-12 16:13:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:41,467 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:41,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:13:41,468 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash -301361666, now seen corresponding path program 16 times [2020-10-12 16:13:41,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:41,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406308853] [2020-10-12 16:13:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:41,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:41,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:42,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:42,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:42,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-12 16:13:42,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:13:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:42,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:42,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:42,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:42,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:42,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:42,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:42,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:42,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406308853] [2020-10-12 16:13:42,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:42,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:13:42,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713502184] [2020-10-12 16:13:42,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:13:42,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:13:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:13:42,510 INFO L87 Difference]: Start difference. First operand 345 states and 452 transitions. Second operand 20 states. [2020-10-12 16:13:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:43,708 INFO L93 Difference]: Finished difference Result 670 states and 937 transitions. [2020-10-12 16:13:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:13:43,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-12 16:13:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:43,711 INFO L225 Difference]: With dead ends: 670 [2020-10-12 16:13:43,711 INFO L226 Difference]: Without dead ends: 604 [2020-10-12 16:13:43,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:13:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-12 16:13:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 360. [2020-10-12 16:13:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-12 16:13:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 474 transitions. [2020-10-12 16:13:43,756 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 474 transitions. Word has length 31 [2020-10-12 16:13:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:43,756 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 474 transitions. [2020-10-12 16:13:43,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:13:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 474 transitions. [2020-10-12 16:13:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:43,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:43,758 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:43,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:13:43,760 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -563055730, now seen corresponding path program 12 times [2020-10-12 16:13:43,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:43,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834755931] [2020-10-12 16:13:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3695 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:13:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:47,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:47,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:47,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:47,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:47,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:47,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834755931] [2020-10-12 16:13:47,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:47,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:13:47,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733353944] [2020-10-12 16:13:47,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:13:47,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:13:47,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:47,745 INFO L87 Difference]: Start difference. First operand 360 states and 474 transitions. Second operand 16 states. [2020-10-12 16:13:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:48,626 INFO L93 Difference]: Finished difference Result 441 states and 573 transitions. [2020-10-12 16:13:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:13:48,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-12 16:13:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:48,628 INFO L225 Difference]: With dead ends: 441 [2020-10-12 16:13:48,628 INFO L226 Difference]: Without dead ends: 408 [2020-10-12 16:13:48,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:13:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-12 16:13:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 360. [2020-10-12 16:13:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-12 16:13:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 471 transitions. [2020-10-12 16:13:48,658 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 471 transitions. Word has length 32 [2020-10-12 16:13:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:48,659 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 471 transitions. [2020-10-12 16:13:48,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:13:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 471 transitions. [2020-10-12 16:13:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:48,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:48,660 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:48,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:13:48,660 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1689823629, now seen corresponding path program 17 times [2020-10-12 16:13:48,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:48,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152244527] [2020-10-12 16:13:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:48,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:49,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:49,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-12 16:13:49,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:13:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:13:49,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:50,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:50,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:50,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:50,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:50,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:50,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152244527] [2020-10-12 16:13:50,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:50,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:13:50,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713833106] [2020-10-12 16:13:50,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:13:50,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:13:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:13:50,329 INFO L87 Difference]: Start difference. First operand 360 states and 471 transitions. Second operand 21 states. [2020-10-12 16:13:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:51,867 INFO L93 Difference]: Finished difference Result 700 states and 981 transitions. [2020-10-12 16:13:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:13:51,867 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-12 16:13:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:51,871 INFO L225 Difference]: With dead ends: 700 [2020-10-12 16:13:51,871 INFO L226 Difference]: Without dead ends: 634 [2020-10-12 16:13:51,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:13:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-10-12 16:13:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 375. [2020-10-12 16:13:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-12 16:13:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 493 transitions. [2020-10-12 16:13:51,907 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 493 transitions. Word has length 32 [2020-10-12 16:13:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:51,907 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 493 transitions. [2020-10-12 16:13:51,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:13:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 493 transitions. [2020-10-12 16:13:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:13:51,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:51,908 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:51,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:13:51,908 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1596020994, now seen corresponding path program 13 times [2020-10-12 16:13:51,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:51,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828397274] [2020-10-12 16:13:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:51,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:52,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:55,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:13:55,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:55,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3326 [2020-10-12 16:13:55,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:13:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:13:55,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:55,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:55,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:55,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:55,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:55,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:55,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:55,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:55,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:55,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 16:13:55,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828397274] [2020-10-12 16:13:55,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:55,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:13:55,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094178045] [2020-10-12 16:13:55,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:13:55,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:55,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:13:55,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:13:55,538 INFO L87 Difference]: Start difference. First operand 375 states and 493 transitions. Second operand 12 states. [2020-10-12 16:13:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:56,070 INFO L93 Difference]: Finished difference Result 419 states and 553 transitions. [2020-10-12 16:13:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:13:56,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-12 16:13:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:56,074 INFO L225 Difference]: With dead ends: 419 [2020-10-12 16:13:56,075 INFO L226 Difference]: Without dead ends: 414 [2020-10-12 16:13:56,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-12 16:13:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 402. [2020-10-12 16:13:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-12 16:13:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 536 transitions. [2020-10-12 16:13:56,106 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 536 transitions. Word has length 33 [2020-10-12 16:13:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:56,106 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 536 transitions. [2020-10-12 16:13:56,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:13:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 536 transitions. [2020-10-12 16:13:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:13:56,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:56,107 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:56,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:13:56,107 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1608876496, now seen corresponding path program 17 times [2020-10-12 16:13:56,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:56,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051451240] [2020-10-12 16:13:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:58,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:58,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2149 [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:13:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:58,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:58,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:58,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:58,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:13:58,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051451240] [2020-10-12 16:13:58,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:58,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:13:58,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482500582] [2020-10-12 16:13:58,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:13:58,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:58,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:13:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:13:58,599 INFO L87 Difference]: Start difference. First operand 402 states and 536 transitions. Second operand 18 states. [2020-10-12 16:13:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:59,311 INFO L93 Difference]: Finished difference Result 528 states and 698 transitions. [2020-10-12 16:13:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:13:59,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 16:13:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:59,315 INFO L225 Difference]: With dead ends: 528 [2020-10-12 16:13:59,315 INFO L226 Difference]: Without dead ends: 509 [2020-10-12 16:13:59,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:13:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-12 16:13:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 402. [2020-10-12 16:13:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-12 16:13:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 535 transitions. [2020-10-12 16:13:59,353 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 535 transitions. Word has length 33 [2020-10-12 16:13:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:59,354 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 535 transitions. [2020-10-12 16:13:59,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:13:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 535 transitions. [2020-10-12 16:13:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:13:59,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:59,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:59,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:13:59,355 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:59,356 INFO L82 PathProgramCache]: Analyzing trace with hash -224556578, now seen corresponding path program 18 times [2020-10-12 16:13:59,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:59,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974322193] [2020-10-12 16:13:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:59,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:59,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:01,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:01,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:14:01,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:01,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1810 [2020-10-12 16:14:01,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:14:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:01,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:01,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:01,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:01,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:01,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:01,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:01,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:01,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:01,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:01,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:01,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974322193] [2020-10-12 16:14:01,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:01,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:14:01,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196935810] [2020-10-12 16:14:01,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:14:01,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:14:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:01,590 INFO L87 Difference]: Start difference. First operand 402 states and 535 transitions. Second operand 20 states. [2020-10-12 16:14:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:02,386 INFO L93 Difference]: Finished difference Result 554 states and 728 transitions. [2020-10-12 16:14:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:14:02,387 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-12 16:14:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:02,389 INFO L225 Difference]: With dead ends: 554 [2020-10-12 16:14:02,390 INFO L226 Difference]: Without dead ends: 534 [2020-10-12 16:14:02,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-12 16:14:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 402. [2020-10-12 16:14:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-12 16:14:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 534 transitions. [2020-10-12 16:14:02,420 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 534 transitions. Word has length 33 [2020-10-12 16:14:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:02,421 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 534 transitions. [2020-10-12 16:14:02,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:14:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 534 transitions. [2020-10-12 16:14:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:14:02,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:02,422 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:02,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:14:02,422 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1007941666, now seen corresponding path program 18 times [2020-10-12 16:14:02,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:02,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192395365] [2020-10-12 16:14:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:14:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:03,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:03,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:04,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:04,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:04,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:04,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:04,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:04,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:04,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:04,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192395365] [2020-10-12 16:14:04,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:04,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:14:04,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499144031] [2020-10-12 16:14:04,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:14:04,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:14:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:04,154 INFO L87 Difference]: Start difference. First operand 402 states and 534 transitions. Second operand 22 states. [2020-10-12 16:14:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:05,610 INFO L93 Difference]: Finished difference Result 770 states and 1095 transitions. [2020-10-12 16:14:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:05,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-12 16:14:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:05,613 INFO L225 Difference]: With dead ends: 770 [2020-10-12 16:14:05,613 INFO L226 Difference]: Without dead ends: 704 [2020-10-12 16:14:05,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-10-12 16:14:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 417. [2020-10-12 16:14:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-12 16:14:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 556 transitions. [2020-10-12 16:14:05,649 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 556 transitions. Word has length 33 [2020-10-12 16:14:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:05,649 INFO L479 AbstractCegarLoop]: Abstraction has 417 states and 556 transitions. [2020-10-12 16:14:05,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:14:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 556 transitions. [2020-10-12 16:14:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:05,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:05,650 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:05,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:14:05,651 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash -793644370, now seen corresponding path program 19 times [2020-10-12 16:14:05,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:05,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873558249] [2020-10-12 16:14:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:05,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:09,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:09,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:09,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:09,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3695 [2020-10-12 16:14:09,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:14:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:14:09,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:09,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:09,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:09,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:09,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:09,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:09,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:09,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:09,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:09,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:09,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:09,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-12 16:14:09,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873558249] [2020-10-12 16:14:09,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:09,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:14:09,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745221868] [2020-10-12 16:14:09,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:14:09,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:14:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:14:09,739 INFO L87 Difference]: Start difference. First operand 417 states and 556 transitions. Second operand 13 states. [2020-10-12 16:14:17,656 WARN L193 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:14:18,248 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 15 [2020-10-12 16:14:20,536 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div c_main_~x~0 4294967296)) 4294967290)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 4294967293)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)) 4294967292)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)) 4294967291))) is different from false [2020-10-12 16:14:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:20,648 INFO L93 Difference]: Finished difference Result 525 states and 707 transitions. [2020-10-12 16:14:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:20,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 16:14:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:20,652 INFO L225 Difference]: With dead ends: 525 [2020-10-12 16:14:20,652 INFO L226 Difference]: Without dead ends: 508 [2020-10-12 16:14:20,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=120, Invalid=303, Unknown=1, NotChecked=38, Total=462 [2020-10-12 16:14:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-12 16:14:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 459. [2020-10-12 16:14:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-12 16:14:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 607 transitions. [2020-10-12 16:14:20,689 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 607 transitions. Word has length 34 [2020-10-12 16:14:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:20,689 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 607 transitions. [2020-10-12 16:14:20,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:14:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 607 transitions. [2020-10-12 16:14:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:20,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:20,692 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:20,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:14:20,692 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:20,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2098494527, now seen corresponding path program 9 times [2020-10-12 16:14:20,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:20,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146024527] [2020-10-12 16:14:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:20,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3320 [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:24,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:14:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:14:24,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:24,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:24,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:24,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-12 16:14:24,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146024527] [2020-10-12 16:14:24,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:24,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:14:24,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635472557] [2020-10-12 16:14:24,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:14:24,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:14:24,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:24,140 INFO L87 Difference]: Start difference. First operand 459 states and 607 transitions. Second operand 9 states. [2020-10-12 16:14:24,424 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 16:14:24,906 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-12 16:14:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:28,299 INFO L93 Difference]: Finished difference Result 486 states and 641 transitions. [2020-10-12 16:14:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:14:28,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-12 16:14:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:28,303 INFO L225 Difference]: With dead ends: 486 [2020-10-12 16:14:28,303 INFO L226 Difference]: Without dead ends: 479 [2020-10-12 16:14:28,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-12 16:14:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 459. [2020-10-12 16:14:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-12 16:14:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 605 transitions. [2020-10-12 16:14:28,344 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 605 transitions. Word has length 34 [2020-10-12 16:14:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:28,344 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 605 transitions. [2020-10-12 16:14:28,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:14:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 605 transitions. [2020-10-12 16:14:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:28,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:28,345 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:28,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:14:28,346 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash 741794190, now seen corresponding path program 14 times [2020-10-12 16:14:28,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:28,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903973845] [2020-10-12 16:14:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:33,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:33,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:33,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 16:14:33,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:14:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:14:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:33,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:33,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:33,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:33,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:33,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:33,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:33,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:33,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 16:14:33,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903973845] [2020-10-12 16:14:33,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:33,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:14:33,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160218916] [2020-10-12 16:14:33,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:14:33,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:33,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:14:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:14:33,640 INFO L87 Difference]: Start difference. First operand 459 states and 605 transitions. Second operand 16 states. [2020-10-12 16:14:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:35,361 INFO L93 Difference]: Finished difference Result 501 states and 659 transitions. [2020-10-12 16:14:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:14:35,362 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-12 16:14:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:35,365 INFO L225 Difference]: With dead ends: 501 [2020-10-12 16:14:35,365 INFO L226 Difference]: Without dead ends: 451 [2020-10-12 16:14:35,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=2785, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:14:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-12 16:14:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 436. [2020-10-12 16:14:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-12 16:14:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 570 transitions. [2020-10-12 16:14:35,406 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 570 transitions. Word has length 34 [2020-10-12 16:14:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:35,406 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 570 transitions. [2020-10-12 16:14:35,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:14:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 570 transitions. [2020-10-12 16:14:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:35,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:35,407 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:35,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:14:35,407 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:35,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1260680109, now seen corresponding path program 19 times [2020-10-12 16:14:35,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:35,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139688782] [2020-10-12 16:14:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:35,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:35,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:36,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:36,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:36,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:36,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-12 16:14:36,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:14:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:37,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:37,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:37,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:37,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:37,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:37,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:37,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:37,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:37,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:37,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:37,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139688782] [2020-10-12 16:14:37,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:37,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:14:37,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717390343] [2020-10-12 16:14:37,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:14:37,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:14:37,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:37,253 INFO L87 Difference]: Start difference. First operand 436 states and 570 transitions. Second operand 23 states. [2020-10-12 16:14:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:38,786 INFO L93 Difference]: Finished difference Result 863 states and 1201 transitions. [2020-10-12 16:14:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:14:38,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-12 16:14:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:38,790 INFO L225 Difference]: With dead ends: 863 [2020-10-12 16:14:38,790 INFO L226 Difference]: Without dead ends: 793 [2020-10-12 16:14:38,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:14:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-10-12 16:14:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 453. [2020-10-12 16:14:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 16:14:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 595 transitions. [2020-10-12 16:14:38,833 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 595 transitions. Word has length 34 [2020-10-12 16:14:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:38,833 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 595 transitions. [2020-10-12 16:14:38,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:14:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 595 transitions. [2020-10-12 16:14:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:38,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:38,834 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:38,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:14:38,834 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash 484826766, now seen corresponding path program 20 times [2020-10-12 16:14:38,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:38,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468437217] [2020-10-12 16:14:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:38,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:39,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:42,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:42,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:42,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3281 [2020-10-12 16:14:42,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:42,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:14:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:42,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:42,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:42,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:42,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:42,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:14:42,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468437217] [2020-10-12 16:14:42,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:42,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:42,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974217644] [2020-10-12 16:14:42,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:42,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:42,455 INFO L87 Difference]: Start difference. First operand 453 states and 595 transitions. Second operand 18 states. [2020-10-12 16:14:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:43,333 INFO L93 Difference]: Finished difference Result 558 states and 720 transitions. [2020-10-12 16:14:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:43,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-12 16:14:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:43,340 INFO L225 Difference]: With dead ends: 558 [2020-10-12 16:14:43,340 INFO L226 Difference]: Without dead ends: 540 [2020-10-12 16:14:43,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:14:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-10-12 16:14:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 453. [2020-10-12 16:14:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 16:14:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 594 transitions. [2020-10-12 16:14:43,414 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 594 transitions. Word has length 35 [2020-10-12 16:14:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:43,414 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 594 transitions. [2020-10-12 16:14:43,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 594 transitions. [2020-10-12 16:14:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:43,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:43,415 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:43,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:14:43,416 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2044677886, now seen corresponding path program 21 times [2020-10-12 16:14:43,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:43,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498343004] [2020-10-12 16:14:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:45,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2484 [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:46,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:46,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:46,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:46,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:46,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:14:46,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498343004] [2020-10-12 16:14:46,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:46,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:14:46,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116066963] [2020-10-12 16:14:46,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:14:46,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:14:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:46,329 INFO L87 Difference]: Start difference. First operand 453 states and 594 transitions. Second operand 20 states. [2020-10-12 16:14:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:47,303 INFO L93 Difference]: Finished difference Result 588 states and 754 transitions. [2020-10-12 16:14:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:14:47,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-12 16:14:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:47,306 INFO L225 Difference]: With dead ends: 588 [2020-10-12 16:14:47,306 INFO L226 Difference]: Without dead ends: 568 [2020-10-12 16:14:47,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-12 16:14:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 453. [2020-10-12 16:14:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 16:14:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 593 transitions. [2020-10-12 16:14:47,352 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 593 transitions. Word has length 35 [2020-10-12 16:14:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:47,353 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 593 transitions. [2020-10-12 16:14:47,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:14:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 593 transitions. [2020-10-12 16:14:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:47,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:47,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:47,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:14:47,354 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:47,354 INFO L82 PathProgramCache]: Analyzing trace with hash -121761650, now seen corresponding path program 22 times [2020-10-12 16:14:47,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:47,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396878236] [2020-10-12 16:14:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2237 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:50,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:50,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:50,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:50,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:50,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:50,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:50,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:50,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:50,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:50,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:50,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396878236] [2020-10-12 16:14:50,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:50,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:14:50,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024877160] [2020-10-12 16:14:50,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:14:50,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:14:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:50,114 INFO L87 Difference]: Start difference. First operand 453 states and 593 transitions. Second operand 22 states. [2020-10-12 16:14:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:51,104 INFO L93 Difference]: Finished difference Result 619 states and 789 transitions. [2020-10-12 16:14:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:14:51,105 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-12 16:14:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:51,107 INFO L225 Difference]: With dead ends: 619 [2020-10-12 16:14:51,108 INFO L226 Difference]: Without dead ends: 598 [2020-10-12 16:14:51,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-10-12 16:14:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 453. [2020-10-12 16:14:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 16:14:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 592 transitions. [2020-10-12 16:14:51,153 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 592 transitions. Word has length 35 [2020-10-12 16:14:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:51,153 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 592 transitions. [2020-10-12 16:14:51,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:14:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 592 transitions. [2020-10-12 16:14:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:51,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:51,154 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:51,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:14:51,154 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1426488898, now seen corresponding path program 20 times [2020-10-12 16:14:51,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:51,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60295055] [2020-10-12 16:14:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:52,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:52,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60295055] [2020-10-12 16:14:52,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:52,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:14:52,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878238377] [2020-10-12 16:14:52,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:14:52,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:52,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:14:52,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:14:52,697 INFO L87 Difference]: Start difference. First operand 453 states and 592 transitions. Second operand 24 states. [2020-10-12 16:14:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:54,602 INFO L93 Difference]: Finished difference Result 899 states and 1253 transitions. [2020-10-12 16:14:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:14:54,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-12 16:14:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:54,607 INFO L225 Difference]: With dead ends: 899 [2020-10-12 16:14:54,608 INFO L226 Difference]: Without dead ends: 829 [2020-10-12 16:14:54,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-10-12 16:14:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 470. [2020-10-12 16:14:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-12 16:14:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 617 transitions. [2020-10-12 16:14:54,723 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 617 transitions. Word has length 35 [2020-10-12 16:14:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:54,727 INFO L479 AbstractCegarLoop]: Abstraction has 470 states and 617 transitions. [2020-10-12 16:14:54,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:14:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 617 transitions. [2020-10-12 16:14:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:54,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:54,729 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:54,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:14:54,730 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:54,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1799296414, now seen corresponding path program 15 times [2020-10-12 16:14:54,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:54,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124346532] [2020-10-12 16:14:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:54,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:14:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:00,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:00,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:00,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:00,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:00,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:00,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 16:15:00,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124346532] [2020-10-12 16:15:00,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:00,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:15:00,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817851875] [2020-10-12 16:15:00,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:15:00,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:15:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:00,174 INFO L87 Difference]: Start difference. First operand 470 states and 617 transitions. Second operand 13 states. [2020-10-12 16:15:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:00,781 INFO L93 Difference]: Finished difference Result 553 states and 719 transitions. [2020-10-12 16:15:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:15:00,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-12 16:15:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:00,786 INFO L225 Difference]: With dead ends: 553 [2020-10-12 16:15:00,786 INFO L226 Difference]: Without dead ends: 548 [2020-10-12 16:15:00,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:15:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-12 16:15:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 524. [2020-10-12 16:15:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-12 16:15:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 687 transitions. [2020-10-12 16:15:00,839 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 687 transitions. Word has length 36 [2020-10-12 16:15:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:00,839 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 687 transitions. [2020-10-12 16:15:00,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:15:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 687 transitions. [2020-10-12 16:15:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:15:00,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:00,840 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:00,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:15:00,840 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1170617805, now seen corresponding path program 21 times [2020-10-12 16:15:00,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:00,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542900288] [2020-10-12 16:15:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2630 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:15:03,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:04,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:04,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:04,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:04,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542900288] [2020-10-12 16:15:04,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:04,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:15:04,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246710938] [2020-10-12 16:15:04,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:15:04,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:04,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:15:04,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:15:04,073 INFO L87 Difference]: Start difference. First operand 524 states and 687 transitions. Second operand 25 states. [2020-10-12 16:15:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:05,937 INFO L93 Difference]: Finished difference Result 1036 states and 1455 transitions. [2020-10-12 16:15:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:15:05,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-12 16:15:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:05,943 INFO L225 Difference]: With dead ends: 1036 [2020-10-12 16:15:05,943 INFO L226 Difference]: Without dead ends: 966 [2020-10-12 16:15:05,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:15:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2020-10-12 16:15:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 541. [2020-10-12 16:15:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-10-12 16:15:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 712 transitions. [2020-10-12 16:15:05,994 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 712 transitions. Word has length 36 [2020-10-12 16:15:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:05,994 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 712 transitions. [2020-10-12 16:15:05,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:15:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 712 transitions. [2020-10-12 16:15:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:15:05,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:05,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:05,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:15:05,995 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash 264412528, now seen corresponding path program 23 times [2020-10-12 16:15:05,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:05,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738779587] [2020-10-12 16:15:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:06,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:10,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4413 [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:15:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:10,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:10,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:10,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:10,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:10,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:10,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:10,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:10,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:10,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:15:10,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738779587] [2020-10-12 16:15:10,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:10,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:15:10,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291868012] [2020-10-12 16:15:10,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:15:10,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:15:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:15:10,759 INFO L87 Difference]: Start difference. First operand 541 states and 712 transitions. Second operand 18 states. [2020-10-12 16:15:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:11,689 INFO L93 Difference]: Finished difference Result 648 states and 873 transitions. [2020-10-12 16:15:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:15:11,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-12 16:15:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:11,692 INFO L225 Difference]: With dead ends: 648 [2020-10-12 16:15:11,692 INFO L226 Difference]: Without dead ends: 620 [2020-10-12 16:15:11,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:15:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-12 16:15:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 533. [2020-10-12 16:15:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-12 16:15:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 703 transitions. [2020-10-12 16:15:11,743 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 703 transitions. Word has length 37 [2020-10-12 16:15:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:11,743 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 703 transitions. [2020-10-12 16:15:11,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:15:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 703 transitions. [2020-10-12 16:15:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:15:11,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:11,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:11,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:15:11,744 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:11,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1381980174, now seen corresponding path program 24 times [2020-10-12 16:15:11,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:11,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819461180] [2020-10-12 16:15:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:11,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:16,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:15:16,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:17,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:17,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:17,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:17,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:17,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:17,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:17,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:17,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 16:15:17,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819461180] [2020-10-12 16:15:17,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:17,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:15:17,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367866864] [2020-10-12 16:15:17,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:15:17,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:17,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:15:17,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:15:17,082 INFO L87 Difference]: Start difference. First operand 533 states and 703 transitions. Second operand 14 states.