/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 12:53:40,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 12:53:40,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 12:53:40,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 12:53:40,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 12:53:40,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 12:53:40,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 12:53:40,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 12:53:40,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 12:53:40,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 12:53:40,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 12:53:40,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 12:53:40,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 12:53:40,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 12:53:40,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 12:53:40,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 12:53:40,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 12:53:40,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 12:53:40,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 12:53:40,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 12:53:40,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 12:53:40,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 12:53:40,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 12:53:40,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 12:53:40,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 12:53:40,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 12:53:40,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 12:53:40,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 12:53:40,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 12:53:40,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 12:53:40,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 12:53:40,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 12:53:40,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 12:53:40,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 12:53:40,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 12:53:40,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 12:53:40,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 12:53:40,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 12:53:40,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 12:53:40,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 12:53:40,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 12:53:40,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 12:53:40,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 12:53:40,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 12:53:40,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 12:53:40,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 12:53:40,437 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 12:53:40,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 12:53:40,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 12:53:40,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 12:53:40,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 12:53:40,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 12:53:40,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 12:53:40,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 12:53:40,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 12:53:40,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 12:53:40,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 12:53:40,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 12:53:40,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 12:53:40,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 12:53:40,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 12:53:40,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 12:53:40,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 12:53:40,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 12:53:40,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 12:53:40,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 12:53:40,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 12:53:40,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 12:53:40,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 12:53:40,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 12:53:40,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 12:53:40,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 12:53:40,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 12:53:40,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 12:53:40,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 12:53:40,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 12:53:40,737 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 12:53:40,738 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-13 12:53:40,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3be6b26ec/d8b9758a1ee345e687764d88b2830049/FLAGe3adcb471 [2020-10-13 12:53:41,300 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 12:53:41,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-13 12:53:41,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3be6b26ec/d8b9758a1ee345e687764d88b2830049/FLAGe3adcb471 [2020-10-13 12:53:41,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3be6b26ec/d8b9758a1ee345e687764d88b2830049 [2020-10-13 12:53:41,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 12:53:41,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 12:53:41,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 12:53:41,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 12:53:41,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 12:53:41,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:53:41" (1/1) ... [2020-10-13 12:53:41,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f72d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:41, skipping insertion in model container [2020-10-13 12:53:41,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:53:41" (1/1) ... [2020-10-13 12:53:41,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 12:53:41,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 12:53:42,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:53:42,057 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 12:53:42,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:53:42,221 INFO L208 MainTranslator]: Completed translation [2020-10-13 12:53:42,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42 WrapperNode [2020-10-13 12:53:42,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 12:53:42,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 12:53:42,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 12:53:42,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 12:53:42,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... [2020-10-13 12:53:42,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 12:53:42,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 12:53:42,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 12:53:42,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 12:53:42,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 12:53:42,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 12:53:42,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 12:53:42,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 12:53:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 12:53:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 12:53:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 12:53:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 12:53:42,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 12:53:43,298 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 12:53:43,299 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 12:53:43,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:53:43 BoogieIcfgContainer [2020-10-13 12:53:43,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 12:53:43,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 12:53:43,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 12:53:43,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 12:53:43,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:53:41" (1/3) ... [2020-10-13 12:53:43,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d9d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:53:43, skipping insertion in model container [2020-10-13 12:53:43,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:53:42" (2/3) ... [2020-10-13 12:53:43,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d9d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:53:43, skipping insertion in model container [2020-10-13 12:53:43,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:53:43" (3/3) ... [2020-10-13 12:53:43,313 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2020-10-13 12:53:43,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 12:53:43,331 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 12:53:43,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 12:53:43,366 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 12:53:43,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 12:53:43,366 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 12:53:43,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 12:53:43,367 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 12:53:43,367 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 12:53:43,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 12:53:43,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 12:53:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-13 12:53:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 12:53:43,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:43,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:43,395 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash 919157391, now seen corresponding path program 1 times [2020-10-13 12:53:43,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:43,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631926478] [2020-10-13 12:53:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:43,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:43,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:43,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 12:53:43,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:43,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 12:53:43,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:43,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:43,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:53:43,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:43,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 12:53:43,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:43,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:43,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:43,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:43,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:43,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 12:53:43,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:43,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:43,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:43,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:43,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-13 12:53:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:43,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631926478] [2020-10-13 12:53:43,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:43,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 12:53:43,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091100664] [2020-10-13 12:53:43,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 12:53:43,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 12:53:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 12:53:43,815 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-10-13 12:53:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:43,908 INFO L93 Difference]: Finished difference Result 224 states and 426 transitions. [2020-10-13 12:53:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 12:53:43,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 12:53:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:43,933 INFO L225 Difference]: With dead ends: 224 [2020-10-13 12:53:43,933 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 12:53:43,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 12:53:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 12:53:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-13 12:53:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 12:53:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 181 transitions. [2020-10-13 12:53:44,028 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 181 transitions. Word has length 14 [2020-10-13 12:53:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:44,029 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 181 transitions. [2020-10-13 12:53:44,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 12:53:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 181 transitions. [2020-10-13 12:53:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 12:53:44,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:44,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:44,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 12:53:44,034 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1038404426, now seen corresponding path program 1 times [2020-10-13 12:53:44,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:44,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297547341] [2020-10-13 12:53:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:44,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:44,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:44,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 12:53:44,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:53:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-13 12:53:44,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 12:53:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 12:53:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:44,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:44,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:44,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:44,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:44,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 12:53:44,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:44,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:44,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:44,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:44,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 12:53:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:44,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297547341] [2020-10-13 12:53:44,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:44,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:44,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886098924] [2020-10-13 12:53:44,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:44,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:44,353 INFO L87 Difference]: Start difference. First operand 110 states and 181 transitions. Second operand 4 states. [2020-10-13 12:53:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:44,892 INFO L93 Difference]: Finished difference Result 318 states and 531 transitions. [2020-10-13 12:53:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:44,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 12:53:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:44,897 INFO L225 Difference]: With dead ends: 318 [2020-10-13 12:53:44,900 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 12:53:44,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 12:53:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 182. [2020-10-13 12:53:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 12:53:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 314 transitions. [2020-10-13 12:53:44,939 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 314 transitions. Word has length 15 [2020-10-13 12:53:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:44,939 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 314 transitions. [2020-10-13 12:53:44,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 314 transitions. [2020-10-13 12:53:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 12:53:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:44,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:44,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 12:53:44,942 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 736602936, now seen corresponding path program 1 times [2020-10-13 12:53:44,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:44,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727690872] [2020-10-13 12:53:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:45,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:45,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 12:53:45,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-13 12:53:45,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:45,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 12:53:45,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 12:53:45,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:53:45,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:45,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:45,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:45,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:45,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 12:53:45,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:45,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727690872] [2020-10-13 12:53:45,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:45,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:45,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147263507] [2020-10-13 12:53:45,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:45,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:45,153 INFO L87 Difference]: Start difference. First operand 182 states and 314 transitions. Second operand 4 states. [2020-10-13 12:53:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:45,522 INFO L93 Difference]: Finished difference Result 365 states and 632 transitions. [2020-10-13 12:53:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:45,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 12:53:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:45,524 INFO L225 Difference]: With dead ends: 365 [2020-10-13 12:53:45,524 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 12:53:45,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 12:53:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-13 12:53:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-13 12:53:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 322 transitions. [2020-10-13 12:53:45,538 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 322 transitions. Word has length 15 [2020-10-13 12:53:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:45,538 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 322 transitions. [2020-10-13 12:53:45,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 322 transitions. [2020-10-13 12:53:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 12:53:45,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:45,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:45,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 12:53:45,540 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 816788357, now seen corresponding path program 1 times [2020-10-13 12:53:45,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:45,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839158300] [2020-10-13 12:53:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:45,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:45,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 12:53:45,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 12:53:45,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:53:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:53:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:45,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:45,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:45,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:45,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:45,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:45,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:53:45,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:53:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:45,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839158300] [2020-10-13 12:53:45,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:45,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:45,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656351709] [2020-10-13 12:53:45,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:45,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:45,705 INFO L87 Difference]: Start difference. First operand 189 states and 322 transitions. Second operand 4 states. [2020-10-13 12:53:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:46,179 INFO L93 Difference]: Finished difference Result 290 states and 484 transitions. [2020-10-13 12:53:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:46,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 12:53:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:46,183 INFO L225 Difference]: With dead ends: 290 [2020-10-13 12:53:46,183 INFO L226 Difference]: Without dead ends: 274 [2020-10-13 12:53:46,186 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 [2020-10-13 12:53:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-13 12:53:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2020-10-13 12:53:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 12:53:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 436 transitions. [2020-10-13 12:53:46,199 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 436 transitions. Word has length 21 [2020-10-13 12:53:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:46,200 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 436 transitions. [2020-10-13 12:53:46,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 436 transitions. [2020-10-13 12:53:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 12:53:46,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:46,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:46,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 12:53:46,202 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1993084704, now seen corresponding path program 1 times [2020-10-13 12:53:46,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:46,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814346949] [2020-10-13 12:53:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:46,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:46,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:46,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:46,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 12:53:46,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:46,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 12:53:46,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:46,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:53:46,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 12:53:46,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:46,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:46,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:46,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:46,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:46,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814346949] [2020-10-13 12:53:46,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:46,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:46,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365821436] [2020-10-13 12:53:46,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:46,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:46,333 INFO L87 Difference]: Start difference. First operand 259 states and 436 transitions. Second operand 4 states. [2020-10-13 12:53:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:46,624 INFO L93 Difference]: Finished difference Result 468 states and 791 transitions. [2020-10-13 12:53:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:46,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-13 12:53:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:46,628 INFO L225 Difference]: With dead ends: 468 [2020-10-13 12:53:46,628 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 12:53:46,629 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 [2020-10-13 12:53:46,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 12:53:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-13 12:53:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 12:53:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 355 transitions. [2020-10-13 12:53:46,652 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 355 transitions. Word has length 22 [2020-10-13 12:53:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:46,652 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 355 transitions. [2020-10-13 12:53:46,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 355 transitions. [2020-10-13 12:53:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 12:53:46,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:46,657 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:46,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 12:53:46,658 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:46,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:46,658 INFO L82 PathProgramCache]: Analyzing trace with hash -365898165, now seen corresponding path program 1 times [2020-10-13 12:53:46,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:46,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596026070] [2020-10-13 12:53:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:46,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:46,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 12:53:46,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:46,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-13 12:53:46,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 12:53:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 12:53:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:46,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:47,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:47,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:47,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:47,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:47,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:47,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:53:47,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596026070] [2020-10-13 12:53:47,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:47,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:47,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344487210] [2020-10-13 12:53:47,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:47,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:47,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:47,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:47,012 INFO L87 Difference]: Start difference. First operand 214 states and 355 transitions. Second operand 4 states. [2020-10-13 12:53:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:47,134 INFO L93 Difference]: Finished difference Result 389 states and 646 transitions. [2020-10-13 12:53:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:47,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 12:53:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:47,137 INFO L225 Difference]: With dead ends: 389 [2020-10-13 12:53:47,137 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 12:53:47,138 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 [2020-10-13 12:53:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 12:53:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-10-13 12:53:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 12:53:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 291 transitions. [2020-10-13 12:53:47,147 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 291 transitions. Word has length 28 [2020-10-13 12:53:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:47,147 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 291 transitions. [2020-10-13 12:53:47,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 291 transitions. [2020-10-13 12:53:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 12:53:47,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:47,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:47,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 12:53:47,149 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1624798356, now seen corresponding path program 1 times [2020-10-13 12:53:47,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:47,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917747075] [2020-10-13 12:53:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:47,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:47,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:47,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:47,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 12:53:47,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:53:47,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-13 12:53:47,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 12:53:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:53:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 12:53:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:47,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:47,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:47,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:47,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:47,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:47,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:47,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:47,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:47,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:47,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:47,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:47,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917747075] [2020-10-13 12:53:47,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:53:47,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 12:53:47,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982020911] [2020-10-13 12:53:47,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 12:53:47,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 12:53:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:47,475 INFO L87 Difference]: Start difference. First operand 180 states and 291 transitions. Second operand 5 states. [2020-10-13 12:53:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:48,143 INFO L93 Difference]: Finished difference Result 435 states and 706 transitions. [2020-10-13 12:53:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 12:53:48,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 12:53:48,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:48,146 INFO L225 Difference]: With dead ends: 435 [2020-10-13 12:53:48,147 INFO L226 Difference]: Without dead ends: 282 [2020-10-13 12:53:48,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:53:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-13 12:53:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2020-10-13 12:53:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-13 12:53:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 408 transitions. [2020-10-13 12:53:48,159 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 408 transitions. Word has length 30 [2020-10-13 12:53:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:48,159 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 408 transitions. [2020-10-13 12:53:48,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 12:53:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 408 transitions. [2020-10-13 12:53:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 12:53:48,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:48,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:48,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 12:53:48,161 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -944739986, now seen corresponding path program 1 times [2020-10-13 12:53:48,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:48,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597748613] [2020-10-13 12:53:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:48,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:48,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 12:53:48,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-13 12:53:48,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 12:53:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:53:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 12:53:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:48,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:48,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:48,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:48,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:48,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:48,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:48,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:48,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:48,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:53:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:53:48,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597748613] [2020-10-13 12:53:48,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:48,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 12:53:48,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736299435] [2020-10-13 12:53:48,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 12:53:48,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 12:53:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:48,408 INFO L87 Difference]: Start difference. First operand 245 states and 408 transitions. Second operand 5 states. [2020-10-13 12:53:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:49,007 INFO L93 Difference]: Finished difference Result 416 states and 695 transitions. [2020-10-13 12:53:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:53:49,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 12:53:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:49,011 INFO L225 Difference]: With dead ends: 416 [2020-10-13 12:53:49,011 INFO L226 Difference]: Without dead ends: 406 [2020-10-13 12:53:49,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:53:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-13 12:53:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 380. [2020-10-13 12:53:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-13 12:53:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 633 transitions. [2020-10-13 12:53:49,029 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 633 transitions. Word has length 30 [2020-10-13 12:53:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:49,030 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 633 transitions. [2020-10-13 12:53:49,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 12:53:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 633 transitions. [2020-10-13 12:53:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 12:53:49,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:49,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:49,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 12:53:49,037 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash 789275061, now seen corresponding path program 1 times [2020-10-13 12:53:49,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:49,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593163157] [2020-10-13 12:53:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:49,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:49,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 12:53:49,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:49,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-13 12:53:49,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:49,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 12:53:49,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:53:49,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 12:53:49,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:49,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:49,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:49,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:49,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 12:53:49,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:49,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:53:49,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593163157] [2020-10-13 12:53:49,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:49,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 12:53:49,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518157161] [2020-10-13 12:53:49,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 12:53:49,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 12:53:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:49,537 INFO L87 Difference]: Start difference. First operand 380 states and 633 transitions. Second operand 5 states. [2020-10-13 12:53:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:50,163 INFO L93 Difference]: Finished difference Result 405 states and 659 transitions. [2020-10-13 12:53:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:53:50,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-13 12:53:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:50,166 INFO L225 Difference]: With dead ends: 405 [2020-10-13 12:53:50,167 INFO L226 Difference]: Without dead ends: 398 [2020-10-13 12:53:50,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:53:50,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-13 12:53:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 382. [2020-10-13 12:53:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-13 12:53:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 627 transitions. [2020-10-13 12:53:50,181 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 627 transitions. Word has length 31 [2020-10-13 12:53:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:50,182 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 627 transitions. [2020-10-13 12:53:50,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 12:53:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 627 transitions. [2020-10-13 12:53:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 12:53:50,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:50,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:50,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 12:53:50,183 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:50,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2038890699, now seen corresponding path program 1 times [2020-10-13 12:53:50,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:50,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833769876] [2020-10-13 12:53:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:50,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:50,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:50,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 12:53:50,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:50,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-13 12:53:50,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 12:53:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:53:50,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:50,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:50,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:50,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:50,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:50,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:53:50,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833769876] [2020-10-13 12:53:50,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:50,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:50,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302195775] [2020-10-13 12:53:50,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:50,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:50,326 INFO L87 Difference]: Start difference. First operand 382 states and 627 transitions. Second operand 4 states. [2020-10-13 12:53:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:50,567 INFO L93 Difference]: Finished difference Result 673 states and 1102 transitions. [2020-10-13 12:53:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:50,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-13 12:53:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:50,570 INFO L225 Difference]: With dead ends: 673 [2020-10-13 12:53:50,571 INFO L226 Difference]: Without dead ends: 321 [2020-10-13 12:53:50,572 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 [2020-10-13 12:53:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-13 12:53:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2020-10-13 12:53:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-13 12:53:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 506 transitions. [2020-10-13 12:53:50,590 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 506 transitions. Word has length 32 [2020-10-13 12:53:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:50,591 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 506 transitions. [2020-10-13 12:53:50,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 506 transitions. [2020-10-13 12:53:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 12:53:50,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:50,597 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:50,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 12:53:50,598 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash 820851006, now seen corresponding path program 1 times [2020-10-13 12:53:50,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:50,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087115419] [2020-10-13 12:53:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:50,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:51,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:51,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 12:53:51,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:53:51,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-13 12:53:51,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:51,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:51,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 12:53:51,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:53:51,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:51,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:51,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:51,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:51,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:51,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:51,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:51,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:51,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:51,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:51,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 12:53:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087115419] [2020-10-13 12:53:51,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:51,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:51,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741051291] [2020-10-13 12:53:51,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:51,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:51,175 INFO L87 Difference]: Start difference. First operand 319 states and 506 transitions. Second operand 4 states. [2020-10-13 12:53:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:51,368 INFO L93 Difference]: Finished difference Result 550 states and 879 transitions. [2020-10-13 12:53:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:51,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-13 12:53:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:51,371 INFO L225 Difference]: With dead ends: 550 [2020-10-13 12:53:51,372 INFO L226 Difference]: Without dead ends: 261 [2020-10-13 12:53:51,373 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 [2020-10-13 12:53:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-13 12:53:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2020-10-13 12:53:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 12:53:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 407 transitions. [2020-10-13 12:53:51,384 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 407 transitions. Word has length 40 [2020-10-13 12:53:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:51,385 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 407 transitions. [2020-10-13 12:53:51,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 407 transitions. [2020-10-13 12:53:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 12:53:51,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:51,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:51,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 12:53:51,387 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:51,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1867136664, now seen corresponding path program 1 times [2020-10-13 12:53:51,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:51,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805189770] [2020-10-13 12:53:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:51,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:51,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 12:53:51,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-13 12:53:51,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:53:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:53:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 12:53:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:51,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:51,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:51,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:53:51,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:53:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 12:53:51,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805189770] [2020-10-13 12:53:51,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:51,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 12:53:51,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930147478] [2020-10-13 12:53:51,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 12:53:51,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:51,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 12:53:51,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:51,892 INFO L87 Difference]: Start difference. First operand 259 states and 407 transitions. Second operand 5 states. [2020-10-13 12:53:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:52,596 INFO L93 Difference]: Finished difference Result 616 states and 981 transitions. [2020-10-13 12:53:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:53:52,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-13 12:53:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:52,599 INFO L225 Difference]: With dead ends: 616 [2020-10-13 12:53:52,599 INFO L226 Difference]: Without dead ends: 380 [2020-10-13 12:53:52,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:53:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-13 12:53:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 360. [2020-10-13 12:53:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-13 12:53:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 574 transitions. [2020-10-13 12:53:52,615 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 574 transitions. Word has length 41 [2020-10-13 12:53:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:52,616 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 574 transitions. [2020-10-13 12:53:52,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 12:53:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 574 transitions. [2020-10-13 12:53:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 12:53:52,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:52,617 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:52,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 12:53:52,617 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:52,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2035215205, now seen corresponding path program 1 times [2020-10-13 12:53:52,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:52,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862521276] [2020-10-13 12:53:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:52,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:52,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:52,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 12:53:52,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-13 12:53:52,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:53:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:53:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 12:53:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:52,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:53,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:53,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:53,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:53,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 12:53:53,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:53:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:53:53,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862521276] [2020-10-13 12:53:53,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:53:53,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 12:53:53,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600455199] [2020-10-13 12:53:53,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:53:53,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:53,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:53:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:53:53,016 INFO L87 Difference]: Start difference. First operand 360 states and 574 transitions. Second operand 6 states. [2020-10-13 12:53:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:53,825 INFO L93 Difference]: Finished difference Result 870 states and 1404 transitions. [2020-10-13 12:53:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:53:53,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-13 12:53:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:53,829 INFO L225 Difference]: With dead ends: 870 [2020-10-13 12:53:53,830 INFO L226 Difference]: Without dead ends: 525 [2020-10-13 12:53:53,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 12:53:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-13 12:53:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 495. [2020-10-13 12:53:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-13 12:53:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 767 transitions. [2020-10-13 12:53:53,848 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 767 transitions. Word has length 42 [2020-10-13 12:53:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:53,849 INFO L479 AbstractCegarLoop]: Abstraction has 495 states and 767 transitions. [2020-10-13 12:53:53,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:53:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 767 transitions. [2020-10-13 12:53:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 12:53:53,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:53,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:53,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 12:53:53,850 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1344285081, now seen corresponding path program 1 times [2020-10-13 12:53:53,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:53,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169452032] [2020-10-13 12:53:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:53,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:53,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 12:53:53,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 12:53:53,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:53:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:53:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 12:53:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:54,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:54,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:54,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:54,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:54,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:54,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:54,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:54,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 12:53:54,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169452032] [2020-10-13 12:53:54,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:54,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 12:53:54,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296873897] [2020-10-13 12:53:54,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 12:53:54,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:54,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 12:53:54,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:53:54,056 INFO L87 Difference]: Start difference. First operand 495 states and 767 transitions. Second operand 5 states. [2020-10-13 12:53:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:54,460 INFO L93 Difference]: Finished difference Result 756 states and 1169 transitions. [2020-10-13 12:53:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 12:53:54,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-13 12:53:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:54,465 INFO L225 Difference]: With dead ends: 756 [2020-10-13 12:53:54,465 INFO L226 Difference]: Without dead ends: 748 [2020-10-13 12:53:54,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:53:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-13 12:53:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 702. [2020-10-13 12:53:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-10-13 12:53:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1088 transitions. [2020-10-13 12:53:54,498 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1088 transitions. Word has length 43 [2020-10-13 12:53:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:54,499 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1088 transitions. [2020-10-13 12:53:54,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 12:53:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1088 transitions. [2020-10-13 12:53:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 12:53:54,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:54,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:54,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 12:53:54,501 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1265387988, now seen corresponding path program 1 times [2020-10-13 12:53:54,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:54,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903039513] [2020-10-13 12:53:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:54,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:54,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:54,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 12:53:54,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:54,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-13 12:53:54,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:53:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:53:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 12:53:54,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:54,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:54,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:54,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:54,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:54,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:53:54,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903039513] [2020-10-13 12:53:54,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:53:54,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 12:53:54,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131194993] [2020-10-13 12:53:54,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:53:54,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:53:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:53:54,865 INFO L87 Difference]: Start difference. First operand 702 states and 1088 transitions. Second operand 6 states. [2020-10-13 12:53:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:55,560 INFO L93 Difference]: Finished difference Result 729 states and 1122 transitions. [2020-10-13 12:53:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:53:55,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-13 12:53:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:55,566 INFO L225 Difference]: With dead ends: 729 [2020-10-13 12:53:55,566 INFO L226 Difference]: Without dead ends: 727 [2020-10-13 12:53:55,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 12:53:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-10-13 12:53:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 703. [2020-10-13 12:53:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-10-13 12:53:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1089 transitions. [2020-10-13 12:53:55,601 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1089 transitions. Word has length 44 [2020-10-13 12:53:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:55,601 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 1089 transitions. [2020-10-13 12:53:55,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:53:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1089 transitions. [2020-10-13 12:53:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 12:53:55,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:55,602 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:55,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 12:53:55,603 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash -447084202, now seen corresponding path program 1 times [2020-10-13 12:53:55,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:55,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217014511] [2020-10-13 12:53:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:55,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:55,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:55,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 12:53:55,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:53:55,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 12:53:55,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 12:53:55,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:53:55,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:55,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:55,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:55,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:55,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:55,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:55,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:55,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 12:53:55,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217014511] [2020-10-13 12:53:55,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:55,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:55,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253088551] [2020-10-13 12:53:55,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:55,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:55,842 INFO L87 Difference]: Start difference. First operand 703 states and 1089 transitions. Second operand 4 states. [2020-10-13 12:53:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:56,075 INFO L93 Difference]: Finished difference Result 1325 states and 2036 transitions. [2020-10-13 12:53:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:56,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-13 12:53:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:56,079 INFO L225 Difference]: With dead ends: 1325 [2020-10-13 12:53:56,080 INFO L226 Difference]: Without dead ends: 671 [2020-10-13 12:53:56,081 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 [2020-10-13 12:53:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-10-13 12:53:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 669. [2020-10-13 12:53:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-10-13 12:53:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 998 transitions. [2020-10-13 12:53:56,135 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 998 transitions. Word has length 45 [2020-10-13 12:53:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:56,135 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 998 transitions. [2020-10-13 12:53:56,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 998 transitions. [2020-10-13 12:53:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 12:53:56,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:56,136 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:56,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 12:53:56,137 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1882634818, now seen corresponding path program 1 times [2020-10-13 12:53:56,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:56,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050607378] [2020-10-13 12:53:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:56,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:56,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:57,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:58,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:58,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 12:53:58,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 12:53:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2002 [2020-10-13 12:53:58,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 12:53:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:53:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:58,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:58,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:58,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:58,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:58,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:53:58,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-13 12:53:58,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050607378] [2020-10-13 12:53:58,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:58,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:58,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711714928] [2020-10-13 12:53:58,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:58,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:58,204 INFO L87 Difference]: Start difference. First operand 669 states and 998 transitions. Second operand 4 states. [2020-10-13 12:53:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:53:58,425 INFO L93 Difference]: Finished difference Result 990 states and 1474 transitions. [2020-10-13 12:53:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:53:58,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-13 12:53:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:53:58,428 INFO L225 Difference]: With dead ends: 990 [2020-10-13 12:53:58,428 INFO L226 Difference]: Without dead ends: 390 [2020-10-13 12:53:58,430 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 [2020-10-13 12:53:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-13 12:53:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2020-10-13 12:53:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-13 12:53:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 562 transitions. [2020-10-13 12:53:58,445 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 562 transitions. Word has length 55 [2020-10-13 12:53:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:53:58,445 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 562 transitions. [2020-10-13 12:53:58,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:53:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 562 transitions. [2020-10-13 12:53:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 12:53:58,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:53:58,446 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:53:58,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 12:53:58,447 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:53:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:53:58,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1573307774, now seen corresponding path program 1 times [2020-10-13 12:53:58,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:53:58,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119518580] [2020-10-13 12:53:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:53:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:59,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:59,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 12:53:59,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 12:53:59,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-13 12:53:59,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:53:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 12:53:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 12:53:59,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:59,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:53:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:53:59,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:53:59,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:53:59,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:53:59,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:53:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:53:59,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:53:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:53:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:53:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:53:59,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:53:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 12:53:59,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119518580] [2020-10-13 12:53:59,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:53:59,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:53:59,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354832351] [2020-10-13 12:53:59,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:53:59,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:53:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:53:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:53:59,932 INFO L87 Difference]: Start difference. First operand 388 states and 562 transitions. Second operand 4 states. [2020-10-13 12:54:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:00,208 INFO L93 Difference]: Finished difference Result 396 states and 568 transitions. [2020-10-13 12:54:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:54:00,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-13 12:54:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:00,211 INFO L225 Difference]: With dead ends: 396 [2020-10-13 12:54:00,212 INFO L226 Difference]: Without dead ends: 391 [2020-10-13 12:54:00,213 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 [2020-10-13 12:54:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-13 12:54:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2020-10-13 12:54:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-13 12:54:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 559 transitions. [2020-10-13 12:54:00,234 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 559 transitions. Word has length 56 [2020-10-13 12:54:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:00,234 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 559 transitions. [2020-10-13 12:54:00,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:54:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 559 transitions. [2020-10-13 12:54:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 12:54:00,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:00,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:00,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 12:54:00,236 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473212, now seen corresponding path program 1 times [2020-10-13 12:54:00,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:00,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475575629] [2020-10-13 12:54:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:00,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:00,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 12:54:00,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:00,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-13 12:54:00,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:00,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:54:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 12:54:00,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:00,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:00,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:00,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:00,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:00,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:00,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:00,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 12:54:00,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475575629] [2020-10-13 12:54:00,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:00,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 12:54:00,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864799084] [2020-10-13 12:54:00,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:54:00,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:54:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:54:00,839 INFO L87 Difference]: Start difference. First operand 388 states and 559 transitions. Second operand 6 states. [2020-10-13 12:54:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:01,684 INFO L93 Difference]: Finished difference Result 649 states and 929 transitions. [2020-10-13 12:54:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:54:01,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-13 12:54:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:01,687 INFO L225 Difference]: With dead ends: 649 [2020-10-13 12:54:01,687 INFO L226 Difference]: Without dead ends: 404 [2020-10-13 12:54:01,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 12:54:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-13 12:54:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 389. [2020-10-13 12:54:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-13 12:54:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 554 transitions. [2020-10-13 12:54:01,704 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 554 transitions. Word has length 56 [2020-10-13 12:54:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:01,704 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 554 transitions. [2020-10-13 12:54:01,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:54:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 554 transitions. [2020-10-13 12:54:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 12:54:01,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:01,705 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:01,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 12:54:01,706 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2081270361, now seen corresponding path program 1 times [2020-10-13 12:54:01,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:01,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229151147] [2020-10-13 12:54:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:01,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:01,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:02,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:02,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 12:54:02,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:54:02,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-13 12:54:02,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:54:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 12:54:02,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:02,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:02,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:02,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:02,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:02,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:02,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:54:02,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229151147] [2020-10-13 12:54:02,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:02,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 12:54:02,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629753671] [2020-10-13 12:54:02,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 12:54:02,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 12:54:02,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:54:02,930 INFO L87 Difference]: Start difference. First operand 389 states and 554 transitions. Second operand 8 states. [2020-10-13 12:54:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:03,562 INFO L93 Difference]: Finished difference Result 486 states and 685 transitions. [2020-10-13 12:54:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 12:54:03,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-13 12:54:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:03,565 INFO L225 Difference]: With dead ends: 486 [2020-10-13 12:54:03,565 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 12:54:03,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-10-13 12:54:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 12:54:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-10-13 12:54:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-13 12:54:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 325 transitions. [2020-10-13 12:54:03,582 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 325 transitions. Word has length 59 [2020-10-13 12:54:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:03,583 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 325 transitions. [2020-10-13 12:54:03,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 12:54:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 325 transitions. [2020-10-13 12:54:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 12:54:03,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:03,590 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:03,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 12:54:03,590 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1104488738, now seen corresponding path program 1 times [2020-10-13 12:54:03,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:03,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481424442] [2020-10-13 12:54:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:03,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:03,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 12:54:03,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:03,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-13 12:54:03,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:54:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 12:54:03,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:03,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:03,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:03,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:03,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:03,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:03,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:03,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:03,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:03,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:03,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:03,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:03,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481424442] [2020-10-13 12:54:03,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:03,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 12:54:03,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004503076] [2020-10-13 12:54:03,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 12:54:03,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 12:54:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:54:03,951 INFO L87 Difference]: Start difference. First operand 234 states and 325 transitions. Second operand 7 states. [2020-10-13 12:54:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:04,683 INFO L93 Difference]: Finished difference Result 258 states and 357 transitions. [2020-10-13 12:54:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:54:04,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-13 12:54:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:04,686 INFO L225 Difference]: With dead ends: 258 [2020-10-13 12:54:04,686 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 12:54:04,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:54:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 12:54:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-13 12:54:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 12:54:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 355 transitions. [2020-10-13 12:54:04,699 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 355 transitions. Word has length 60 [2020-10-13 12:54:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:04,699 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 355 transitions. [2020-10-13 12:54:04,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 12:54:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 355 transitions. [2020-10-13 12:54:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 12:54:04,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:04,700 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:04,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 12:54:04,700 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 855434068, now seen corresponding path program 1 times [2020-10-13 12:54:04,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:04,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137619883] [2020-10-13 12:54:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:04,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:04,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:05,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:05,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 12:54:05,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-13 12:54:05,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:05,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:54:05,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:54:05,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 12:54:05,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:05,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:05,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:05,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:05,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:05,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 12:54:05,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137619883] [2020-10-13 12:54:05,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:05,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 12:54:05,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968788427] [2020-10-13 12:54:05,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 12:54:05,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 12:54:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:54:05,435 INFO L87 Difference]: Start difference. First operand 256 states and 355 transitions. Second operand 8 states. [2020-10-13 12:54:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:06,713 INFO L93 Difference]: Finished difference Result 276 states and 367 transitions. [2020-10-13 12:54:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 12:54:06,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-13 12:54:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:06,721 INFO L225 Difference]: With dead ends: 276 [2020-10-13 12:54:06,722 INFO L226 Difference]: Without dead ends: 274 [2020-10-13 12:54:06,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-13 12:54:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-13 12:54:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 256. [2020-10-13 12:54:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 12:54:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 354 transitions. [2020-10-13 12:54:06,740 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 354 transitions. Word has length 67 [2020-10-13 12:54:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:06,741 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 354 transitions. [2020-10-13 12:54:06,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 12:54:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 354 transitions. [2020-10-13 12:54:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 12:54:06,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:06,742 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:06,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 12:54:06,742 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1201928326, now seen corresponding path program 1 times [2020-10-13 12:54:06,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:06,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917073389] [2020-10-13 12:54:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:06,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:07,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:07,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 12:54:07,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:07,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-13 12:54:07,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 12:54:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 12:54:07,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:07,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:07,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:07,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:07,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:07,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:07,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:07,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:07,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 12:54:07,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917073389] [2020-10-13 12:54:07,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:07,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 12:54:07,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839184843] [2020-10-13 12:54:07,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 12:54:07,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 12:54:07,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:54:07,348 INFO L87 Difference]: Start difference. First operand 256 states and 354 transitions. Second operand 7 states. [2020-10-13 12:54:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:08,078 INFO L93 Difference]: Finished difference Result 405 states and 559 transitions. [2020-10-13 12:54:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:54:08,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-13 12:54:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:08,080 INFO L225 Difference]: With dead ends: 405 [2020-10-13 12:54:08,080 INFO L226 Difference]: Without dead ends: 320 [2020-10-13 12:54:08,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:54:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-13 12:54:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 273. [2020-10-13 12:54:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-13 12:54:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 378 transitions. [2020-10-13 12:54:08,094 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 378 transitions. Word has length 77 [2020-10-13 12:54:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:08,094 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 378 transitions. [2020-10-13 12:54:08,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 12:54:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 378 transitions. [2020-10-13 12:54:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 12:54:08,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:08,096 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:08,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 12:54:08,096 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1100197245, now seen corresponding path program 1 times [2020-10-13 12:54:08,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:08,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793574910] [2020-10-13 12:54:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:08,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:08,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:08,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 12:54:08,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-13 12:54:08,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 12:54:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 12:54:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:09,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:09,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:09,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:09,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:09,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:09,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:09,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:09,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793574910] [2020-10-13 12:54:09,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:09,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 12:54:09,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738471182] [2020-10-13 12:54:09,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 12:54:09,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:09,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 12:54:09,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 12:54:09,177 INFO L87 Difference]: Start difference. First operand 273 states and 378 transitions. Second operand 10 states. [2020-10-13 12:54:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:10,862 INFO L93 Difference]: Finished difference Result 314 states and 433 transitions. [2020-10-13 12:54:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 12:54:10,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-10-13 12:54:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:10,866 INFO L225 Difference]: With dead ends: 314 [2020-10-13 12:54:10,866 INFO L226 Difference]: Without dead ends: 312 [2020-10-13 12:54:10,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 12:54:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-13 12:54:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-13 12:54:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 12:54:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 431 transitions. [2020-10-13 12:54:10,879 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 431 transitions. Word has length 90 [2020-10-13 12:54:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:10,880 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 431 transitions. [2020-10-13 12:54:10,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 12:54:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 431 transitions. [2020-10-13 12:54:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 12:54:10,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:10,881 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:10,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 12:54:10,881 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:10,882 INFO L82 PathProgramCache]: Analyzing trace with hash -669250513, now seen corresponding path program 1 times [2020-10-13 12:54:10,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:10,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566577657] [2020-10-13 12:54:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:10,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:11,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:11,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 12:54:11,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:11,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-13 12:54:11,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 12:54:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 12:54:11,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:12,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:12,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:12,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:12,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:12,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:12,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 12:54:12,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:12,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:12,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566577657] [2020-10-13 12:54:12,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:12,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 12:54:12,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117754448] [2020-10-13 12:54:12,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 12:54:12,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 12:54:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:54:12,093 INFO L87 Difference]: Start difference. First operand 312 states and 431 transitions. Second operand 11 states. [2020-10-13 12:54:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:13,729 INFO L93 Difference]: Finished difference Result 336 states and 463 transitions. [2020-10-13 12:54:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 12:54:13,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2020-10-13 12:54:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:13,732 INFO L225 Difference]: With dead ends: 336 [2020-10-13 12:54:13,732 INFO L226 Difference]: Without dead ends: 334 [2020-10-13 12:54:13,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 12:54:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-13 12:54:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2020-10-13 12:54:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-13 12:54:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 461 transitions. [2020-10-13 12:54:13,746 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 461 transitions. Word has length 106 [2020-10-13 12:54:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:13,747 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 461 transitions. [2020-10-13 12:54:13,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 12:54:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 461 transitions. [2020-10-13 12:54:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 12:54:13,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:13,748 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:13,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 12:54:13,749 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1815351467, now seen corresponding path program 2 times [2020-10-13 12:54:13,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:13,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438940429] [2020-10-13 12:54:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:15,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:15,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 12:54:15,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-13 12:54:15,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 12:54:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 12:54:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:15,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:15,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:15,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:15,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:15,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:15,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 12:54:15,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438940429] [2020-10-13 12:54:15,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:15,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 12:54:15,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904994553] [2020-10-13 12:54:15,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 12:54:15,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 12:54:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 12:54:15,190 INFO L87 Difference]: Start difference. First operand 334 states and 461 transitions. Second operand 9 states. [2020-10-13 12:54:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:16,219 INFO L93 Difference]: Finished difference Result 483 states and 666 transitions. [2020-10-13 12:54:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 12:54:16,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-10-13 12:54:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:16,222 INFO L225 Difference]: With dead ends: 483 [2020-10-13 12:54:16,222 INFO L226 Difference]: Without dead ends: 398 [2020-10-13 12:54:16,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-13 12:54:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-13 12:54:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 351. [2020-10-13 12:54:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-13 12:54:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 485 transitions. [2020-10-13 12:54:16,244 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 485 transitions. Word has length 123 [2020-10-13 12:54:16,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:16,244 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 485 transitions. [2020-10-13 12:54:16,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 12:54:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 485 transitions. [2020-10-13 12:54:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 12:54:16,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:16,246 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:16,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 12:54:16,246 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash -287211762, now seen corresponding path program 2 times [2020-10-13 12:54:16,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:16,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410444324] [2020-10-13 12:54:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:16,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:17,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:17,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 12:54:17,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-13 12:54:17,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 12:54:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 12:54:17,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:18,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:18,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:18,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:18,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:18,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:18,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:18,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 33 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:18,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410444324] [2020-10-13 12:54:18,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:18,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 12:54:18,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987011076] [2020-10-13 12:54:18,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 12:54:18,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 12:54:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 12:54:18,514 INFO L87 Difference]: Start difference. First operand 351 states and 485 transitions. Second operand 14 states. [2020-10-13 12:54:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:21,762 INFO L93 Difference]: Finished difference Result 392 states and 540 transitions. [2020-10-13 12:54:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 12:54:21,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2020-10-13 12:54:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:21,765 INFO L225 Difference]: With dead ends: 392 [2020-10-13 12:54:21,765 INFO L226 Difference]: Without dead ends: 390 [2020-10-13 12:54:21,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 12:54:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-13 12:54:21,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-10-13 12:54:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-13 12:54:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 538 transitions. [2020-10-13 12:54:21,780 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 538 transitions. Word has length 136 [2020-10-13 12:54:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:21,781 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 538 transitions. [2020-10-13 12:54:21,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 12:54:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 538 transitions. [2020-10-13 12:54:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 12:54:21,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:21,783 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:21,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 12:54:21,783 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1445028928, now seen corresponding path program 2 times [2020-10-13 12:54:21,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:21,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990806304] [2020-10-13 12:54:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:23,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:23,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-13 12:54:23,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:23,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:23,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:23,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:23,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:23,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:23,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:24,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990806304] [2020-10-13 12:54:24,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:24,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 12:54:24,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856127885] [2020-10-13 12:54:24,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 12:54:24,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 12:54:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-13 12:54:24,006 INFO L87 Difference]: Start difference. First operand 390 states and 538 transitions. Second operand 15 states. [2020-10-13 12:54:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:27,204 INFO L93 Difference]: Finished difference Result 414 states and 570 transitions. [2020-10-13 12:54:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 12:54:27,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 152 [2020-10-13 12:54:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:27,208 INFO L225 Difference]: With dead ends: 414 [2020-10-13 12:54:27,208 INFO L226 Difference]: Without dead ends: 412 [2020-10-13 12:54:27,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-13 12:54:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-13 12:54:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2020-10-13 12:54:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-13 12:54:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 568 transitions. [2020-10-13 12:54:27,227 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 568 transitions. Word has length 152 [2020-10-13 12:54:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:27,227 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 568 transitions. [2020-10-13 12:54:27,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 12:54:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 568 transitions. [2020-10-13 12:54:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 12:54:27,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:27,229 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:27,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 12:54:27,230 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 305812452, now seen corresponding path program 3 times [2020-10-13 12:54:27,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:27,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539979306] [2020-10-13 12:54:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:27,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:29,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:29,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 12:54:29,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:29,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1852 [2020-10-13 12:54:29,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:29,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 12:54:29,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:29,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-13 12:54:29,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:29,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:29,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:29,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:29,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:29,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:29,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 98 proven. 470 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 12:54:29,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539979306] [2020-10-13 12:54:29,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:29,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 12:54:29,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361398477] [2020-10-13 12:54:29,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 12:54:29,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 12:54:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:54:29,284 INFO L87 Difference]: Start difference. First operand 412 states and 568 transitions. Second operand 11 states. [2020-10-13 12:54:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:30,560 INFO L93 Difference]: Finished difference Result 561 states and 773 transitions. [2020-10-13 12:54:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 12:54:30,561 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2020-10-13 12:54:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:30,564 INFO L225 Difference]: With dead ends: 561 [2020-10-13 12:54:30,564 INFO L226 Difference]: Without dead ends: 476 [2020-10-13 12:54:30,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-13 12:54:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-13 12:54:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2020-10-13 12:54:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-13 12:54:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 592 transitions. [2020-10-13 12:54:30,581 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 592 transitions. Word has length 169 [2020-10-13 12:54:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:30,581 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 592 transitions. [2020-10-13 12:54:30,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 12:54:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 592 transitions. [2020-10-13 12:54:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 12:54:30,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:30,583 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:30,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 12:54:30,583 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1596376353, now seen corresponding path program 3 times [2020-10-13 12:54:30,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:30,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051451240] [2020-10-13 12:54:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2787 [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 12:54:33,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:33,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-13 12:54:33,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:34,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:34,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:34,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:34,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:34,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:34,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:34,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:34,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:34,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:34,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 45 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:34,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051451240] [2020-10-13 12:54:34,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:34,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 12:54:34,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54515915] [2020-10-13 12:54:34,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 12:54:34,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 12:54:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 12:54:34,174 INFO L87 Difference]: Start difference. First operand 429 states and 592 transitions. Second operand 18 states. [2020-10-13 12:54:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:39,368 INFO L93 Difference]: Finished difference Result 470 states and 647 transitions. [2020-10-13 12:54:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 12:54:39,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 182 [2020-10-13 12:54:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:39,372 INFO L225 Difference]: With dead ends: 470 [2020-10-13 12:54:39,372 INFO L226 Difference]: Without dead ends: 468 [2020-10-13 12:54:39,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 12:54:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-13 12:54:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2020-10-13 12:54:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-13 12:54:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 645 transitions. [2020-10-13 12:54:39,391 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 645 transitions. Word has length 182 [2020-10-13 12:54:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:39,392 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 645 transitions. [2020-10-13 12:54:39,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 12:54:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 645 transitions. [2020-10-13 12:54:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-13 12:54:39,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:39,394 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:39,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 12:54:39,394 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2108593553, now seen corresponding path program 3 times [2020-10-13 12:54:39,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:39,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021908184] [2020-10-13 12:54:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:42,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:42,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2942 [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-13 12:54:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:42,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:42,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:42,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:42,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:42,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:42,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:54:42,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:42,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:54:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 48 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:43,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021908184] [2020-10-13 12:54:43,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:43,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 12:54:43,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678268511] [2020-10-13 12:54:43,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 12:54:43,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 12:54:43,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 12:54:43,195 INFO L87 Difference]: Start difference. First operand 468 states and 645 transitions. Second operand 19 states. [2020-10-13 12:54:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:48,651 INFO L93 Difference]: Finished difference Result 492 states and 677 transitions. [2020-10-13 12:54:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 12:54:48,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 198 [2020-10-13 12:54:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:48,654 INFO L225 Difference]: With dead ends: 492 [2020-10-13 12:54:48,654 INFO L226 Difference]: Without dead ends: 490 [2020-10-13 12:54:48,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 12:54:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-13 12:54:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-10-13 12:54:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-13 12:54:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 675 transitions. [2020-10-13 12:54:48,673 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 675 transitions. Word has length 198 [2020-10-13 12:54:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:48,673 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 675 transitions. [2020-10-13 12:54:48,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 12:54:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 675 transitions. [2020-10-13 12:54:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-13 12:54:48,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:48,675 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 13, 13, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:48,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 12:54:48,676 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:48,676 INFO L82 PathProgramCache]: Analyzing trace with hash -699066829, now seen corresponding path program 4 times [2020-10-13 12:54:48,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:48,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014682037] [2020-10-13 12:54:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:48,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:52,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-13 12:54:52,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3409 [2020-10-13 12:54:52,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 12:54:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-13 12:54:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:52,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:52,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 128 proven. 842 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 12:54:52,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014682037] [2020-10-13 12:54:52,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:54:52,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 12:54:52,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811449465] [2020-10-13 12:54:52,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 12:54:52,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:52,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 12:54:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 12:54:52,414 INFO L87 Difference]: Start difference. First operand 490 states and 675 transitions. Second operand 13 states. [2020-10-13 12:54:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:54,326 INFO L93 Difference]: Finished difference Result 639 states and 880 transitions. [2020-10-13 12:54:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 12:54:54,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 215 [2020-10-13 12:54:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:54,330 INFO L225 Difference]: With dead ends: 639 [2020-10-13 12:54:54,331 INFO L226 Difference]: Without dead ends: 554 [2020-10-13 12:54:54,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 12:54:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-10-13 12:54:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 507. [2020-10-13 12:54:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-13 12:54:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 699 transitions. [2020-10-13 12:54:54,349 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 699 transitions. Word has length 215 [2020-10-13 12:54:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:54,350 INFO L479 AbstractCegarLoop]: Abstraction has 507 states and 699 transitions. [2020-10-13 12:54:54,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 12:54:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 699 transitions. [2020-10-13 12:54:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-13 12:54:54,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:54,352 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 14, 14, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:54,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 12:54:54,352 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:54,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1657081616, now seen corresponding path program 4 times [2020-10-13 12:54:54,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:54,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258920673] [2020-10-13 12:54:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:59,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:59,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-13 12:54:59,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 12:54:59,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 12:54:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:54:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-13 12:54:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:00,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:00,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:00,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 57 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:00,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258920673] [2020-10-13 12:55:00,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:00,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 12:55:00,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955753992] [2020-10-13 12:55:00,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 12:55:00,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:00,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 12:55:00,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-13 12:55:00,286 INFO L87 Difference]: Start difference. First operand 507 states and 699 transitions. Second operand 22 states. [2020-10-13 12:55:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:07,877 INFO L93 Difference]: Finished difference Result 548 states and 754 transitions. [2020-10-13 12:55:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 12:55:07,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 228 [2020-10-13 12:55:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:07,880 INFO L225 Difference]: With dead ends: 548 [2020-10-13 12:55:07,880 INFO L226 Difference]: Without dead ends: 546 [2020-10-13 12:55:07,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 12:55:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-13 12:55:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2020-10-13 12:55:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-13 12:55:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 752 transitions. [2020-10-13 12:55:07,899 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 752 transitions. Word has length 228 [2020-10-13 12:55:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:07,900 INFO L479 AbstractCegarLoop]: Abstraction has 546 states and 752 transitions. [2020-10-13 12:55:07,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 12:55:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 752 transitions. [2020-10-13 12:55:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-13 12:55:07,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:07,902 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 15, 15, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:07,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 12:55:07,902 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1221850718, now seen corresponding path program 4 times [2020-10-13 12:55:07,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:07,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557488965] [2020-10-13 12:55:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:13,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:13,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-13 12:55:13,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:13,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 12:55:13,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:13,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 12:55:13,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:55:13,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-13 12:55:13,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:13,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:13,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:13,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:13,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:13,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 60 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:13,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557488965] [2020-10-13 12:55:13,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:13,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 12:55:13,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848482289] [2020-10-13 12:55:13,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 12:55:13,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 12:55:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-13 12:55:13,684 INFO L87 Difference]: Start difference. First operand 546 states and 752 transitions. Second operand 23 states. [2020-10-13 12:55:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:21,955 INFO L93 Difference]: Finished difference Result 570 states and 784 transitions. [2020-10-13 12:55:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 12:55:21,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 244 [2020-10-13 12:55:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:21,960 INFO L225 Difference]: With dead ends: 570 [2020-10-13 12:55:21,960 INFO L226 Difference]: Without dead ends: 568 [2020-10-13 12:55:21,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 12:55:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-13 12:55:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2020-10-13 12:55:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-10-13 12:55:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 782 transitions. [2020-10-13 12:55:21,980 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 782 transitions. Word has length 244 [2020-10-13 12:55:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:21,981 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 782 transitions. [2020-10-13 12:55:21,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 12:55:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 782 transitions. [2020-10-13 12:55:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-13 12:55:21,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:21,983 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 16, 16, 10, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:21,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 12:55:21,983 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1318987330, now seen corresponding path program 5 times [2020-10-13 12:55:21,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:21,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904549179] [2020-10-13 12:55:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:22,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:27,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:27,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-13 12:55:27,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:27,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:27,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:27,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:27,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:27,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 158 proven. 1322 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 12:55:27,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904549179] [2020-10-13 12:55:27,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:27,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 12:55:27,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775143095] [2020-10-13 12:55:27,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 12:55:27,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:27,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 12:55:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 12:55:27,310 INFO L87 Difference]: Start difference. First operand 568 states and 782 transitions. Second operand 15 states. [2020-10-13 12:55:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:29,356 INFO L93 Difference]: Finished difference Result 717 states and 987 transitions. [2020-10-13 12:55:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 12:55:29,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 261 [2020-10-13 12:55:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:29,361 INFO L225 Difference]: With dead ends: 717 [2020-10-13 12:55:29,361 INFO L226 Difference]: Without dead ends: 632 [2020-10-13 12:55:29,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-13 12:55:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-10-13 12:55:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 585. [2020-10-13 12:55:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-13 12:55:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 806 transitions. [2020-10-13 12:55:29,380 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 806 transitions. Word has length 261 [2020-10-13 12:55:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:29,381 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 806 transitions. [2020-10-13 12:55:29,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 12:55:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 806 transitions. [2020-10-13 12:55:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-13 12:55:29,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:29,383 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 17, 17, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:29,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 12:55:29,384 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1138052799, now seen corresponding path program 5 times [2020-10-13 12:55:29,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:29,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050838484] [2020-10-13 12:55:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:29,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:34,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-13 12:55:34,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:34,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-13 12:55:34,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 12:55:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:55:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 261 [2020-10-13 12:55:34,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:35,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:35,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:35,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:35,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:35,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:35,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 69 proven. 1624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:35,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050838484] [2020-10-13 12:55:35,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:35,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 12:55:35,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763405096] [2020-10-13 12:55:35,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 12:55:35,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 12:55:35,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-13 12:55:35,641 INFO L87 Difference]: Start difference. First operand 585 states and 806 transitions. Second operand 26 states. [2020-10-13 12:55:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:46,946 INFO L93 Difference]: Finished difference Result 626 states and 861 transitions. [2020-10-13 12:55:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 12:55:46,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 274 [2020-10-13 12:55:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:46,950 INFO L225 Difference]: With dead ends: 626 [2020-10-13 12:55:46,950 INFO L226 Difference]: Without dead ends: 624 [2020-10-13 12:55:46,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 12:55:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2020-10-13 12:55:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2020-10-13 12:55:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-10-13 12:55:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 859 transitions. [2020-10-13 12:55:46,969 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 859 transitions. Word has length 274 [2020-10-13 12:55:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:46,969 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 859 transitions. [2020-10-13 12:55:46,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 12:55:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 859 transitions. [2020-10-13 12:55:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-13 12:55:46,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:46,972 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 18, 18, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:46,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 12:55:46,972 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:46,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:46,972 INFO L82 PathProgramCache]: Analyzing trace with hash 73074675, now seen corresponding path program 5 times [2020-10-13 12:55:46,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:46,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70100402] [2020-10-13 12:55:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:52,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:52,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-13 12:55:52,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:52,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 12:55:52,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:52,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 12:55:52,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:55:52,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 277 [2020-10-13 12:55:52,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:52,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:52,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:52,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:52,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:52,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:52,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:52,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 72 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:53,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70100402] [2020-10-13 12:55:53,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:55:53,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 12:55:53,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310945908] [2020-10-13 12:55:53,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 12:55:53,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 12:55:53,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-13 12:55:53,100 INFO L87 Difference]: Start difference. First operand 624 states and 859 transitions. Second operand 27 states. [2020-10-13 12:56:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:56:05,480 INFO L93 Difference]: Finished difference Result 628 states and 861 transitions. [2020-10-13 12:56:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 12:56:05,481 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 290 [2020-10-13 12:56:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:56:05,485 INFO L225 Difference]: With dead ends: 628 [2020-10-13 12:56:05,485 INFO L226 Difference]: Without dead ends: 626 [2020-10-13 12:56:05,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 12:56:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-10-13 12:56:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 624. [2020-10-13 12:56:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-10-13 12:56:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 858 transitions. [2020-10-13 12:56:05,505 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 858 transitions. Word has length 290 [2020-10-13 12:56:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:56:05,506 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 858 transitions. [2020-10-13 12:56:05,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 12:56:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 858 transitions. [2020-10-13 12:56:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-13 12:56:05,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:56:05,509 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 19, 19, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:56:05,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 12:56:05,509 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:56:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:56:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash 867398673, now seen corresponding path program 6 times [2020-10-13 12:56:05,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:56:05,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200353338] [2020-10-13 12:56:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:56:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:05,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:10,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:10,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 12:56:10,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:10,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 12:56:10,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 12:56:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:56:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 286 [2020-10-13 12:56:10,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:10,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:56:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:10,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:10,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:10,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:56:10,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:10,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:56:10,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:56:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:56:10,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:56:10,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 188 proven. 1910 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 12:56:10,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200353338] [2020-10-13 12:56:10,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:56:10,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 12:56:10,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063295145] [2020-10-13 12:56:10,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 12:56:10,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:56:10,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 12:56:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 12:56:10,980 INFO L87 Difference]: Start difference. First operand 624 states and 858 transitions. Second operand 17 states. [2020-10-13 12:56:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:56:13,291 INFO L93 Difference]: Finished difference Result 795 states and 1093 transitions. [2020-10-13 12:56:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 12:56:13,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 307 [2020-10-13 12:56:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:56:13,296 INFO L225 Difference]: With dead ends: 795 [2020-10-13 12:56:13,296 INFO L226 Difference]: Without dead ends: 710 [2020-10-13 12:56:13,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-13 12:56:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-13 12:56:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 663. [2020-10-13 12:56:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-10-13 12:56:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 912 transitions. [2020-10-13 12:56:13,317 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 912 transitions. Word has length 307 [2020-10-13 12:56:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:56:13,317 INFO L479 AbstractCegarLoop]: Abstraction has 663 states and 912 transitions. [2020-10-13 12:56:13,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 12:56:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 912 transitions. [2020-10-13 12:56:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-13 12:56:13,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:56:13,320 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 20, 20, 13, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:56:13,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 12:56:13,320 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:56:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:56:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -651129902, now seen corresponding path program 6 times [2020-10-13 12:56:13,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:56:13,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142234822] [2020-10-13 12:56:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:56:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:13,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:18,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:18,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-13 12:56:18,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-13 12:56:18,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 12:56:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:56:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 307 [2020-10-13 12:56:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:56:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:19,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:19,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:56:19,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:19,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 12:56:19,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:56:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:56:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:56:19,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 81 proven. 2270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:56:20,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142234822] [2020-10-13 12:56:20,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:56:20,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 12:56:20,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907894582] [2020-10-13 12:56:20,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 12:56:20,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:56:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 12:56:20,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 12:56:20,034 INFO L87 Difference]: Start difference. First operand 663 states and 912 transitions. Second operand 30 states. [2020-10-13 12:56:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:56:35,722 INFO L93 Difference]: Finished difference Result 704 states and 967 transitions. [2020-10-13 12:56:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 12:56:35,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 320 [2020-10-13 12:56:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:56:35,727 INFO L225 Difference]: With dead ends: 704 [2020-10-13 12:56:35,727 INFO L226 Difference]: Without dead ends: 702 [2020-10-13 12:56:35,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 12:56:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-13 12:56:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-10-13 12:56:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-10-13 12:56:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 965 transitions. [2020-10-13 12:56:35,748 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 965 transitions. Word has length 320 [2020-10-13 12:56:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:56:35,749 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 965 transitions. [2020-10-13 12:56:35,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 12:56:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 965 transitions. [2020-10-13 12:56:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-13 12:56:35,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:56:35,751 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 22, 22, 14, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:56:35,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 12:56:35,752 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:56:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:56:35,752 INFO L82 PathProgramCache]: Analyzing trace with hash 927920032, now seen corresponding path program 7 times [2020-10-13 12:56:35,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:56:35,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004792594] [2020-10-13 12:56:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:56:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:36,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:41,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:41,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-13 12:56:41,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:41,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-13 12:56:41,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:41,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 12:56:41,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:56:41,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 332 [2020-10-13 12:56:41,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:41,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:56:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:41,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:56:41,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:41,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:56:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:56:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:56:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:56:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2894 backedges. 218 proven. 2606 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 12:56:41,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004792594] [2020-10-13 12:56:41,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:56:41,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 12:56:41,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163808822] [2020-10-13 12:56:41,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 12:56:41,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:56:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 12:56:41,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 12:56:41,429 INFO L87 Difference]: Start difference. First operand 702 states and 965 transitions. Second operand 19 states. [2020-10-13 12:56:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:56:44,149 INFO L93 Difference]: Finished difference Result 873 states and 1200 transitions. [2020-10-13 12:56:44,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 12:56:44,150 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 353 [2020-10-13 12:56:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:56:44,153 INFO L225 Difference]: With dead ends: 873 [2020-10-13 12:56:44,153 INFO L226 Difference]: Without dead ends: 788 [2020-10-13 12:56:44,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 12:56:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-10-13 12:56:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 741. [2020-10-13 12:56:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-10-13 12:56:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1019 transitions. [2020-10-13 12:56:44,171 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1019 transitions. Word has length 353 [2020-10-13 12:56:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:56:44,172 INFO L479 AbstractCegarLoop]: Abstraction has 741 states and 1019 transitions. [2020-10-13 12:56:44,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 12:56:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1019 transitions. [2020-10-13 12:56:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-13 12:56:44,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:56:44,175 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 23, 23, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:56:44,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 12:56:44,175 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:56:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:56:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2076667741, now seen corresponding path program 7 times [2020-10-13 12:56:44,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:56:44,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33552808] [2020-10-13 12:56:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:56:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:49,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5223 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-13 12:56:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:51,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:56:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:56:51,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:56:51,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 93 proven. 3024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:56:51,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33552808] [2020-10-13 12:56:51,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 12:56:51,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 12:56:51,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252635609] [2020-10-13 12:56:51,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 12:56:51,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:56:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 12:56:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 12:56:51,311 INFO L87 Difference]: Start difference. First operand 741 states and 1019 transitions. Second operand 34 states. [2020-10-13 12:57:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:57:11,736 INFO L93 Difference]: Finished difference Result 782 states and 1074 transitions. [2020-10-13 12:57:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 12:57:11,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 366 [2020-10-13 12:57:11,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:57:11,741 INFO L225 Difference]: With dead ends: 782 [2020-10-13 12:57:11,741 INFO L226 Difference]: Without dead ends: 780 [2020-10-13 12:57:11,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 12:57:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-13 12:57:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2020-10-13 12:57:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-13 12:57:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1072 transitions. [2020-10-13 12:57:11,764 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1072 transitions. Word has length 366 [2020-10-13 12:57:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:57:11,765 INFO L479 AbstractCegarLoop]: Abstraction has 780 states and 1072 transitions. [2020-10-13 12:57:11,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 12:57:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1072 transitions. [2020-10-13 12:57:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-10-13 12:57:11,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:57:11,768 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 25, 25, 16, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:57:11,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 12:57:11,768 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:57:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:57:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1934002415, now seen corresponding path program 8 times [2020-10-13 12:57:11,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:57:11,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083006446] [2020-10-13 12:57:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:57:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 12:57:12,252 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 12:57:12,252 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 12:57:12,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 12:57:12,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:57:12 BoogieIcfgContainer [2020-10-13 12:57:12,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 12:57:12,335 INFO L168 Benchmark]: Toolchain (without parser) took 210682.69 ms. Allocated memory was 141.6 MB in the beginning and 2.1 GB in the end (delta: 2.0 GB). Free memory was 104.4 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2020-10-13 12:57:12,335 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 12:57:12,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 568.95 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.2 MB in the beginning and 177.7 MB in the end (delta: -73.4 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-10-13 12:57:12,336 INFO L168 Benchmark]: Boogie Preprocessor took 82.01 ms. Allocated memory is still 205.0 MB. Free memory was 177.7 MB in the beginning and 174.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-10-13 12:57:12,336 INFO L168 Benchmark]: RCFGBuilder took 998.46 ms. Allocated memory is still 205.0 MB. Free memory was 174.0 MB in the beginning and 122.7 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-10-13 12:57:12,337 INFO L168 Benchmark]: TraceAbstraction took 209025.28 ms. Allocated memory was 205.0 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 122.1 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2020-10-13 12:57:12,338 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 568.95 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.2 MB in the beginning and 177.7 MB in the end (delta: -73.4 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.01 ms. Allocated memory is still 205.0 MB. Free memory was 177.7 MB in the beginning and 174.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 998.46 ms. Allocated memory is still 205.0 MB. Free memory was 174.0 MB in the beginning and 122.7 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209025.28 ms. Allocated memory was 205.0 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 122.1 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 569]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L5] int m_Protocol = 1; [L6] int m_msg_2 = 2; [L7] int m_recv_ack_2 = 3; [L8] int m_msg_1_1 = 4; [L9] int m_msg_1_2 = 5; [L10] int m_recv_ack_1_1 = 6; [L11] int m_recv_ack_1_2 = 7; [L16] int q = 0; [L17] int method_id; [L20] int this_expect = 0; [L21] int this_buffer_empty = 0; [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND TRUE q == 0 [L44] COND TRUE __VERIFIER_nondet_int() [L48] method_id = 1 [L50] COND FALSE !(0) [L54] q = 1 [L56] this_expect=0 [L56] this_buffer_empty=1 [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND FALSE !((((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2))))) [L290] q = 4 [L292] this_expect=this_expect [L292] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND TRUE q == 4 [L364] COND FALSE !(__VERIFIER_nondet_int()) [L380] COND FALSE !(__VERIFIER_nondet_int()) [L396] COND FALSE !(__VERIFIER_nondet_int()) [L412] COND TRUE __VERIFIER_nondet_int() [L414] COND TRUE (((P1 % 2) != (0 % 2)) && !(((P1 % 2) != ((0 + 1) % 2)) && ((P1 % 2) != (0 % 2)))) [L416] method_id = 5 [L418] COND FALSE !(((((((P6 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))) || (((this_buffer_empty != 1) && ((P6 % 2) != (0 % 2))) && (((P6 % 2) != (0 % 2)) && !(((P6 % 2) != ((0 + 1) % 2)) && ((P6 % 2) != (0 % 2))))))) [L422] q = 5 [L424] this_expect=(this_expect + 1) [L424] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND FALSE !(q == 3) [L363] COND FALSE !(q == 4) [L463] COND TRUE q == 5 [L464] COND FALSE !(__VERIFIER_nondet_int()) [L480] COND FALSE !(__VERIFIER_nondet_int()) [L496] COND FALSE !(__VERIFIER_nondet_int()) [L512] COND FALSE !(__VERIFIER_nondet_int()) [L528] COND FALSE !(__VERIFIER_nondet_int()) [L544] COND TRUE __VERIFIER_nondet_int() [L546] COND TRUE ((P1 != (((0 + 1) - 1) % 2)) && !((P1 != ((((0 + 1) + 1) - 1) % 2)) && (P1 != (((0 + 1) - 1) % 2)))) [L548] method_id = 7 [L550] COND FALSE !(((((this_buffer_empty == 1) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))) || ((((P9 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && (P9 != (((0 + 1) - 1) % 2))) && ((P9 != (((0 + 1) - 1) % 2)) && !((P9 != ((((0 + 1) + 1) - 1) % 2)) && (P9 != (((0 + 1) - 1) % 2))))))) [L554] q = 1 [L556] this_expect=this_expect [L556] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND FALSE !((((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2))))) [L74] q = 3 [L76] this_expect=(this_expect + 1) [L76] this_buffer_empty=(1 - this_buffer_empty) [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND TRUE this_expect > 16 [L39] this_expect = -16 [L43] COND FALSE !(q == 0) [L63] COND FALSE !(q == 1) [L163] COND FALSE !(q == 2) [L263] COND TRUE q == 3 [L264] COND FALSE !(__VERIFIER_nondet_int()) [L280] COND TRUE __VERIFIER_nondet_int() [L282] COND TRUE !(P1 != (((0 + 1) - 1) % 2)) [L284] method_id = 3 [L286] COND TRUE (((this_buffer_empty == 1) && !(P3 != (((0 + 1) - 1) % 2))) || (((P3 != ((this_expect - 1) % 2)) && (this_buffer_empty != 1)) && !(P3 != (((0 + 1) - 1) % 2)))) [L569] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 115 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 208.8s, OverallIterations: 42, TraceHistogramMax: 35, AutomataDifference: 119.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10369 SDtfs, 24405 SDslu, 1698 SDs, 0 SdLazy, 130375 SolverSat, 884 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1199 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2610 ImplicationChecksByTransitivity, 19.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=780occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 41 MinimizatonAttempts, 627 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 83.1s InterpolantComputationTime, 5336 NumberOfCodeBlocks, 5336 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 4896 ConstructedInterpolants, 0 QuantifiedInterpolants, 8925832 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 15 PerfectInterpolantSequences, 2187/23215 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...