/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/eca-rers2012/Problem17_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:27:43,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:27:43,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:27:43,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:27:43,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:27:43,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:27:43,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:27:43,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:27:43,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:27:43,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:27:43,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:27:43,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:27:43,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:27:43,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:27:43,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:27:43,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:27:43,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:27:43,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:27:43,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:27:43,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:27:43,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:27:43,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:27:43,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:27:43,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:27:43,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:27:43,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:27:43,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:27:43,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:27:43,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:27:43,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:27:43,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:27:43,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:27:43,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:27:43,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:27:43,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:27:43,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:27:43,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:27:43,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:27:43,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:27:43,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:27:43,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:27:43,464 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 09:27:43,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:27:43,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:27:43,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:27:43,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:27:43,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:27:43,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:27:43,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:27:43,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:27:43,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:27:43,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:27:43,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:27:43,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:27:43,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:27:43,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:27:43,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:27:43,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:27:43,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:27:43,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:27:43,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:27:43,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:27:43,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:27:43,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:27:43,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:27:43,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:27:43,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:27:43,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:27:43,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:27:43,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:27:43,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:27:43,492 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 09:27:43,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:27:43,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:27:43,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:27:43,786 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:27:43,787 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:27:43,787 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label10.c [2020-10-13 09:27:43,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2991d917/0baf1ba8f03c44d3bdbaa34d84cb84d8/FLAG5647b1615 [2020-10-13 09:27:44,570 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:27:44,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label10.c [2020-10-13 09:27:44,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2991d917/0baf1ba8f03c44d3bdbaa34d84cb84d8/FLAG5647b1615 [2020-10-13 09:27:44,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2991d917/0baf1ba8f03c44d3bdbaa34d84cb84d8 [2020-10-13 09:27:44,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:27:44,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:27:44,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:27:44,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:27:44,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:27:44,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:27:44" (1/1) ... [2020-10-13 09:27:44,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:44, skipping insertion in model container [2020-10-13 09:27:44,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:27:44" (1/1) ... [2020-10-13 09:27:44,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:27:44,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:27:46,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:27:46,037 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:27:46,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:27:46,522 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:27:46,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46 WrapperNode [2020-10-13 09:27:46,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:27:46,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:27:46,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:27:46,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:27:46,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (1/1) ... [2020-10-13 09:27:46,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:27:46,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:27:46,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:27:46,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:27:46,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (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 09:27:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:27:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:27:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:27:46,805 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:27:46,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:27:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:27:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:27:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:27:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:27:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:27:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:27:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:27:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:27:53,421 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:27:53,421 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:27:53,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:27:53 BoogieIcfgContainer [2020-10-13 09:27:53,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:27:53,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:27:53,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:27:53,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:27:53,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:27:44" (1/3) ... [2020-10-13 09:27:53,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17499652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:27:53, skipping insertion in model container [2020-10-13 09:27:53,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:27:46" (2/3) ... [2020-10-13 09:27:53,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17499652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:27:53, skipping insertion in model container [2020-10-13 09:27:53,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:27:53" (3/3) ... [2020-10-13 09:27:53,438 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label10.c [2020-10-13 09:27:53,450 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:27:53,459 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:27:53,474 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:27:53,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:27:53,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:27:53,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:27:53,501 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:27:53,501 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:27:53,501 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:27:53,501 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:27:53,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:27:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-13 09:27:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 09:27:53,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:27:53,542 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:27:53,542 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:27:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:27:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash 461986881, now seen corresponding path program 1 times [2020-10-13 09:27:53,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:27:53,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209030576] [2020-10-13 09:27:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:27:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:27:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:27:54,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:27:54,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 09:27:54,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:27:54,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-13 09:27:54,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:27:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:27:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:27:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 09:27:54,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:27:54,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:27:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:27:54,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:27:54,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:27:54,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:27:54,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:27:54,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 09:27:54,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:27:54,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:27:54,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:27:54,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:27:54,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:27:54,398 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 09:27:54,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209030576] [2020-10-13 09:27:54,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:27:54,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:27:54,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23244319] [2020-10-13 09:27:54,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:27:54,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:27:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:27:54,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:27:54,430 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2020-10-13 09:28:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:28:08,437 INFO L93 Difference]: Finished difference Result 1716 states and 3126 transitions. [2020-10-13 09:28:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:28:08,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-13 09:28:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:28:08,466 INFO L225 Difference]: With dead ends: 1716 [2020-10-13 09:28:08,466 INFO L226 Difference]: Without dead ends: 1034 [2020-10-13 09:28:08,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:28:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2020-10-13 09:28:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1008. [2020-10-13 09:28:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1008 states. [2020-10-13 09:28:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1705 transitions. [2020-10-13 09:28:08,590 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1705 transitions. Word has length 45 [2020-10-13 09:28:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:28:08,591 INFO L479 AbstractCegarLoop]: Abstraction has 1008 states and 1705 transitions. [2020-10-13 09:28:08,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:28:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1705 transitions. [2020-10-13 09:28:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 09:28:08,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:28:08,599 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:28:08,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:28:08,600 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:28:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:28:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1853017043, now seen corresponding path program 1 times [2020-10-13 09:28:08,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:28:08,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249788340] [2020-10-13 09:28:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:28:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:08,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:09,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:09,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:09,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 09:28:09,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:28:09,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-13 09:28:09,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:28:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 09:28:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 09:28:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:28:09,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:28:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:09,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:09,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:28:09,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:09,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:28:09,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:09,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:28:09,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:09,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:28:09,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:28:09,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:28:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:10,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:10,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:10,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 09:28:10,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:10,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 09:28:10,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:28:10,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:10,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 09:28:10,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 09:28:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:28:10,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249788340] [2020-10-13 09:28:10,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:28:10,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:28:10,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267923170] [2020-10-13 09:28:10,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:28:10,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:28:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:28:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:28:10,146 INFO L87 Difference]: Start difference. First operand 1008 states and 1705 transitions. Second operand 5 states. [2020-10-13 09:28:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:28:24,649 INFO L93 Difference]: Finished difference Result 2907 states and 4993 transitions. [2020-10-13 09:28:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:28:24,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-13 09:28:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:28:24,664 INFO L225 Difference]: With dead ends: 2907 [2020-10-13 09:28:24,665 INFO L226 Difference]: Without dead ends: 1905 [2020-10-13 09:28:24,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:28:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2020-10-13 09:28:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1890. [2020-10-13 09:28:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-10-13 09:28:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3226 transitions. [2020-10-13 09:28:24,810 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3226 transitions. Word has length 114 [2020-10-13 09:28:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:28:24,813 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 3226 transitions. [2020-10-13 09:28:24,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:28:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3226 transitions. [2020-10-13 09:28:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 09:28:24,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:28:24,827 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 09:28:24,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:28:24,828 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:28:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:28:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1386851809, now seen corresponding path program 1 times [2020-10-13 09:28:24,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:28:24,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412620721] [2020-10-13 09:28:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:28:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:24,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:25,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:26,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:26,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:26,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 09:28:26,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:28:26,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1854 [2020-10-13 09:28:26,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:28:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 09:28:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 09:28:26,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:28:26,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:28:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:26,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:26,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:26,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:28:26,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:26,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:28:26,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:28:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:28:26,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:28:26,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:28:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:27,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:27,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:28:27,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 09:28:27,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:27,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:28:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:28:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:28:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:28:27,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412620721] [2020-10-13 09:28:27,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:28:27,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:28:27,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869721938] [2020-10-13 09:28:27,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:28:27,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:28:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:28:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:28:27,150 INFO L87 Difference]: Start difference. First operand 1890 states and 3226 transitions. Second operand 5 states. [2020-10-13 09:28:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:28:38,745 INFO L93 Difference]: Finished difference Result 3804 states and 6504 transitions. [2020-10-13 09:28:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:28:38,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-13 09:28:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:28:38,770 INFO L225 Difference]: With dead ends: 3804 [2020-10-13 09:28:38,771 INFO L226 Difference]: Without dead ends: 1904 [2020-10-13 09:28:38,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:28:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-13 09:28:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1890. [2020-10-13 09:28:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-10-13 09:28:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3222 transitions. [2020-10-13 09:28:38,842 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3222 transitions. Word has length 120 [2020-10-13 09:28:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:28:38,842 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 3222 transitions. [2020-10-13 09:28:38,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:28:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3222 transitions. [2020-10-13 09:28:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 09:28:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:28:38,847 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 09:28:38,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:28:38,848 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:28:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:28:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash -57029721, now seen corresponding path program 1 times [2020-10-13 09:28:38,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:28:38,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496975013] [2020-10-13 09:28:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:28:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:39,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:39,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 09:28:39,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:28:39,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-13 09:28:39,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:39,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:28:39,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 09:28:39,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 09:28:39,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:28:39,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:28:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:39,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:39,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:39,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:28:39,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:39,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:28:39,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:39,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:28:39,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:39,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:28:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:28:39,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:28:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:39,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:40,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:40,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 09:28:40,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:40,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-13 09:28:40,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:40,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:28:40,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:40,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 09:28:40,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:28:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:28:40,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496975013] [2020-10-13 09:28:40,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:28:40,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:28:40,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273640181] [2020-10-13 09:28:40,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:28:40,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:28:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:28:40,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:28:40,059 INFO L87 Difference]: Start difference. First operand 1890 states and 3222 transitions. Second operand 5 states. [2020-10-13 09:28:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:28:54,026 INFO L93 Difference]: Finished difference Result 5563 states and 9616 transitions. [2020-10-13 09:28:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:28:54,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-13 09:28:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:28:54,052 INFO L225 Difference]: With dead ends: 5563 [2020-10-13 09:28:54,052 INFO L226 Difference]: Without dead ends: 3679 [2020-10-13 09:28:54,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:28:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2020-10-13 09:28:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3667. [2020-10-13 09:28:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3667 states. [2020-10-13 09:28:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 5352 transitions. [2020-10-13 09:28:54,177 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 5352 transitions. Word has length 124 [2020-10-13 09:28:54,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:28:54,179 INFO L479 AbstractCegarLoop]: Abstraction has 3667 states and 5352 transitions. [2020-10-13 09:28:54,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:28:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 5352 transitions. [2020-10-13 09:28:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 09:28:54,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:28:54,183 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 09:28:54,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 09:28:54,183 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:28:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:28:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1333396548, now seen corresponding path program 1 times [2020-10-13 09:28:54,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:28:54,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854935875] [2020-10-13 09:28:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:28:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:54,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:54,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:55,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:55,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 09:28:55,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:28:55,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-13 09:28:55,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:55,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:28:55,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-13 09:28:55,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 09:28:55,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:28:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:28:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:55,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:55,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:28:55,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:55,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:28:55,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:28:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:28:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:28:55,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:28:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:28:55,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:28:55,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:28:55,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 09:28:55,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:28:55,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 09:28:55,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:28:55,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:28:55,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:28:55,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 09:28:55,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:28:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:28:55,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854935875] [2020-10-13 09:28:55,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:28:55,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:28:55,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541902522] [2020-10-13 09:28:55,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:28:55,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:28:55,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:28:55,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:28:55,411 INFO L87 Difference]: Start difference. First operand 3667 states and 5352 transitions. Second operand 5 states. [2020-10-13 09:29:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:29:10,683 INFO L93 Difference]: Finished difference Result 10438 states and 15590 transitions. [2020-10-13 09:29:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:29:10,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-13 09:29:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:29:10,715 INFO L225 Difference]: With dead ends: 10438 [2020-10-13 09:29:10,715 INFO L226 Difference]: Without dead ends: 6777 [2020-10-13 09:29:10,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:29:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6777 states. [2020-10-13 09:29:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6777 to 5889. [2020-10-13 09:29:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5889 states. [2020-10-13 09:29:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 8119 transitions. [2020-10-13 09:29:10,878 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 8119 transitions. Word has length 129 [2020-10-13 09:29:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:29:10,878 INFO L479 AbstractCegarLoop]: Abstraction has 5889 states and 8119 transitions. [2020-10-13 09:29:10,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:29:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 8119 transitions. [2020-10-13 09:29:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 09:29:10,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:29:10,881 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 09:29:10,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 09:29:10,881 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:29:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:29:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash 690832531, now seen corresponding path program 1 times [2020-10-13 09:29:10,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:29:10,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867293661] [2020-10-13 09:29:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:29:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:11,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:11,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:11,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 09:29:11,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:29:11,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-13 09:29:11,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:11,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:29:11,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-13 09:29:11,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 09:29:11,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:29:11,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:29:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:11,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:11,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:11,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:29:11,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:29:11,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:11,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:29:11,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:11,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:29:11,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:29:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:12,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:12,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:12,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 09:29:12,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:12,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 09:29:12,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:29:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 09:29:12,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:29:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:29:12,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867293661] [2020-10-13 09:29:12,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:29:12,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:29:12,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834280753] [2020-10-13 09:29:12,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:29:12,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:29:12,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:29:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:29:12,186 INFO L87 Difference]: Start difference. First operand 5889 states and 8119 transitions. Second operand 5 states. [2020-10-13 09:29:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:29:29,943 INFO L93 Difference]: Finished difference Result 14418 states and 20626 transitions. [2020-10-13 09:29:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:29:29,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-13 09:29:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:29:29,996 INFO L225 Difference]: With dead ends: 14418 [2020-10-13 09:29:29,996 INFO L226 Difference]: Without dead ends: 8535 [2020-10-13 09:29:30,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:29:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8535 states. [2020-10-13 09:29:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8535 to 8524. [2020-10-13 09:29:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8524 states. [2020-10-13 09:29:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 11478 transitions. [2020-10-13 09:29:30,220 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 11478 transitions. Word has length 130 [2020-10-13 09:29:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:29:30,220 INFO L479 AbstractCegarLoop]: Abstraction has 8524 states and 11478 transitions. [2020-10-13 09:29:30,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:29:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 11478 transitions. [2020-10-13 09:29:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 09:29:30,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:29:30,223 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 09:29:30,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 09:29:30,224 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:29:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:29:30,224 INFO L82 PathProgramCache]: Analyzing trace with hash 57058828, now seen corresponding path program 1 times [2020-10-13 09:29:30,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:29:30,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459143236] [2020-10-13 09:29:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:29:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:30,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:31,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:31,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:31,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 09:29:31,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:29:31,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-13 09:29:31,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:31,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:29:31,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 09:29:31,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 09:29:31,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:31,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:29:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:31,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:31,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:31,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:29:31,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:31,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:29:31,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:31,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:29:31,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:31,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:29:31,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:31,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:29:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:31,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:32,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:32,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 09:29:32,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:32,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 09:29:32,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:29:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:32,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 09:29:32,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:29:32,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459143236] [2020-10-13 09:29:32,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:29:32,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:29:32,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113129942] [2020-10-13 09:29:32,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:29:32,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:29:32,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:29:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:29:32,102 INFO L87 Difference]: Start difference. First operand 8524 states and 11478 transitions. Second operand 5 states. [2020-10-13 09:29:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:29:41,274 INFO L93 Difference]: Finished difference Result 17074 states and 23033 transitions. [2020-10-13 09:29:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:29:41,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-13 09:29:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:29:41,308 INFO L225 Difference]: With dead ends: 17074 [2020-10-13 09:29:41,309 INFO L226 Difference]: Without dead ends: 8532 [2020-10-13 09:29:41,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:29:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8532 states. [2020-10-13 09:29:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8532 to 8524. [2020-10-13 09:29:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8524 states. [2020-10-13 09:29:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 11474 transitions. [2020-10-13 09:29:41,515 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 11474 transitions. Word has length 133 [2020-10-13 09:29:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:29:41,515 INFO L479 AbstractCegarLoop]: Abstraction has 8524 states and 11474 transitions. [2020-10-13 09:29:41,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:29:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 11474 transitions. [2020-10-13 09:29:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 09:29:41,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:29:41,520 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1] [2020-10-13 09:29:41,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 09:29:41,520 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:29:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:29:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1921013804, now seen corresponding path program 1 times [2020-10-13 09:29:41,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:29:41,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210367354] [2020-10-13 09:29:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:29:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:41,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:42,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:42,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 09:29:42,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:29:42,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-13 09:29:42,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:42,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:29:42,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-13 09:29:42,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 09:29:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:42,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:29:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:42,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:42,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:42,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:29:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:29:42,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:29:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:29:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:42,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:29:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:42,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:42,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 09:29:42,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:42,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 09:29:42,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:42,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:29:42,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:42,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 09:29:42,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:29:42,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210367354] [2020-10-13 09:29:42,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:29:42,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:29:42,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362752894] [2020-10-13 09:29:42,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:29:42,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:29:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:29:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:29:42,710 INFO L87 Difference]: Start difference. First operand 8524 states and 11474 transitions. Second operand 5 states. [2020-10-13 09:29:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:29:57,670 INFO L93 Difference]: Finished difference Result 20604 states and 28253 transitions. [2020-10-13 09:29:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:29:57,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-10-13 09:29:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:29:57,710 INFO L225 Difference]: With dead ends: 20604 [2020-10-13 09:29:57,711 INFO L226 Difference]: Without dead ends: 12086 [2020-10-13 09:29:57,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:29:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2020-10-13 09:29:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 11617. [2020-10-13 09:29:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11617 states. [2020-10-13 09:29:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11617 states to 11617 states and 15989 transitions. [2020-10-13 09:29:57,977 INFO L78 Accepts]: Start accepts. Automaton has 11617 states and 15989 transitions. Word has length 137 [2020-10-13 09:29:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:29:57,978 INFO L479 AbstractCegarLoop]: Abstraction has 11617 states and 15989 transitions. [2020-10-13 09:29:57,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:29:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11617 states and 15989 transitions. [2020-10-13 09:29:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 09:29:57,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:29:57,984 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 09:29:57,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 09:29:57,985 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:29:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:29:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1034078251, now seen corresponding path program 1 times [2020-10-13 09:29:57,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:29:57,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365161654] [2020-10-13 09:29:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:29:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:58,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:58,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:58,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 09:29:58,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:29:58,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-13 09:29:58,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:58,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:29:58,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 09:29:58,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 09:29:58,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:58,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:29:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:58,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:58,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:29:58,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:58,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:29:58,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:29:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:29:58,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:29:58,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:29:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:29:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:29:58,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:29:58,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 09:29:58,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:29:58,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-13 09:29:58,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:29:58,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:29:58,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:29:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 09:29:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:29:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:29:59,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365161654] [2020-10-13 09:29:59,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:29:59,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:29:59,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068076264] [2020-10-13 09:29:59,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:29:59,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:29:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:29:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:29:59,081 INFO L87 Difference]: Start difference. First operand 11617 states and 15989 transitions. Second operand 5 states. [2020-10-13 09:30:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:30:17,560 INFO L93 Difference]: Finished difference Result 28077 states and 39857 transitions. [2020-10-13 09:30:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:30:17,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-13 09:30:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:30:17,636 INFO L225 Difference]: With dead ends: 28077 [2020-10-13 09:30:17,636 INFO L226 Difference]: Without dead ends: 16466 [2020-10-13 09:30:17,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:30:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16466 states. [2020-10-13 09:30:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16466 to 16445. [2020-10-13 09:30:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16445 states. [2020-10-13 09:30:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16445 states to 16445 states and 21780 transitions. [2020-10-13 09:30:17,993 INFO L78 Accepts]: Start accepts. Automaton has 16445 states and 21780 transitions. Word has length 142 [2020-10-13 09:30:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:30:17,994 INFO L479 AbstractCegarLoop]: Abstraction has 16445 states and 21780 transitions. [2020-10-13 09:30:17,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:30:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 16445 states and 21780 transitions. [2020-10-13 09:30:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 09:30:17,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:30:17,999 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:30:18,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 09:30:18,000 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:30:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:30:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1576968090, now seen corresponding path program 1 times [2020-10-13 09:30:18,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:30:18,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166238193] [2020-10-13 09:30:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:30:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:18,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:18,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:19,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:19,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:19,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 09:30:19,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:30:19,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-13 09:30:19,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:19,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:30:19,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 09:30:19,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 09:30:19,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:30:19,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:30:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:19,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:30:19,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:30:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 09:30:19,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:30:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:30:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:30:19,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:30:19,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:30:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:19,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:19,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:19,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 09:30:19,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:30:19,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 09:30:19,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:30:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:30:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 09:30:19,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:30:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:30:19,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166238193] [2020-10-13 09:30:19,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:30:19,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:30:19,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141849593] [2020-10-13 09:30:19,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:30:19,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:30:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:30:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:30:19,874 INFO L87 Difference]: Start difference. First operand 16445 states and 21780 transitions. Second operand 5 states. [2020-10-13 09:30:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:30:32,670 INFO L93 Difference]: Finished difference Result 32940 states and 43740 transitions. [2020-10-13 09:30:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:30:32,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-10-13 09:30:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:30:32,726 INFO L225 Difference]: With dead ends: 32940 [2020-10-13 09:30:32,726 INFO L226 Difference]: Without dead ends: 16453 [2020-10-13 09:30:32,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:30:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16453 states. [2020-10-13 09:30:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16453 to 16445. [2020-10-13 09:30:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16445 states. [2020-10-13 09:30:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16445 states to 16445 states and 21764 transitions. [2020-10-13 09:30:33,076 INFO L78 Accepts]: Start accepts. Automaton has 16445 states and 21764 transitions. Word has length 146 [2020-10-13 09:30:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:30:33,076 INFO L479 AbstractCegarLoop]: Abstraction has 16445 states and 21764 transitions. [2020-10-13 09:30:33,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:30:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16445 states and 21764 transitions. [2020-10-13 09:30:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 09:30:33,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:30:33,081 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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 09:30:33,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 09:30:33,082 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:30:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:30:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -237753199, now seen corresponding path program 1 times [2020-10-13 09:30:33,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:30:33,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847414560] [2020-10-13 09:30:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:30:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:33,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:33,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:33,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:34,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:34,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 09:30:34,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:30:34,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-13 09:30:34,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:34,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:30:34,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-13 09:30:34,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:30:34,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:30:34,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:30:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:34,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:34,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:30:34,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:30:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:30:34,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:30:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:30:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:30:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:30:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:30:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:34,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:34,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 09:30:34,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:30:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 09:30:34,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:30:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 09:30:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:30:34,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:30:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:30:34,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847414560] [2020-10-13 09:30:34,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:30:34,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:30:34,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001073267] [2020-10-13 09:30:34,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:30:34,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:30:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:30:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:30:34,417 INFO L87 Difference]: Start difference. First operand 16445 states and 21764 transitions. Second operand 5 states. [2020-10-13 09:30:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:30:49,674 INFO L93 Difference]: Finished difference Result 37263 states and 51095 transitions. [2020-10-13 09:30:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:30:49,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-13 09:30:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:30:49,733 INFO L225 Difference]: With dead ends: 37263 [2020-10-13 09:30:49,733 INFO L226 Difference]: Without dead ends: 20824 [2020-10-13 09:30:49,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:30:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20824 states. [2020-10-13 09:30:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20824 to 19948. [2020-10-13 09:30:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19948 states. [2020-10-13 09:30:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19948 states to 19948 states and 26132 transitions. [2020-10-13 09:30:50,137 INFO L78 Accepts]: Start accepts. Automaton has 19948 states and 26132 transitions. Word has length 165 [2020-10-13 09:30:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:30:50,137 INFO L479 AbstractCegarLoop]: Abstraction has 19948 states and 26132 transitions. [2020-10-13 09:30:50,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:30:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19948 states and 26132 transitions. [2020-10-13 09:30:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 09:30:50,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:30:50,146 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:30:50,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 09:30:50,146 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:30:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:30:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash -886754408, now seen corresponding path program 1 times [2020-10-13 09:30:50,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:30:50,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337816207] [2020-10-13 09:30:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:30:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:50,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:51,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:51,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-13 09:30:51,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:30:51,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1550 [2020-10-13 09:30:51,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:30:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-13 09:30:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:30:51,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:30:51,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:30:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:51,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:51,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:30:51,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:30:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:30:51,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:30:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:30:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:30:51,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:30:51,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:30:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:30:52,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:30:52,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:30:52,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 09:30:52,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:30:52,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-13 09:30:52,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:30:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:30:52,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:30:52,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-13 09:30:52,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:30:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:30:52,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337816207] [2020-10-13 09:30:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:30:52,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:30:52,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250241477] [2020-10-13 09:30:52,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:30:52,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:30:52,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:30:52,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:30:52,415 INFO L87 Difference]: Start difference. First operand 19948 states and 26132 transitions. Second operand 5 states. [2020-10-13 09:31:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:31:07,250 INFO L93 Difference]: Finished difference Result 39924 states and 52412 transitions. [2020-10-13 09:31:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:31:07,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2020-10-13 09:31:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:31:07,302 INFO L225 Difference]: With dead ends: 39924 [2020-10-13 09:31:07,302 INFO L226 Difference]: Without dead ends: 19956 [2020-10-13 09:31:07,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:31:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19956 states. [2020-10-13 09:31:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19956 to 19948. [2020-10-13 09:31:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19948 states. [2020-10-13 09:31:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19948 states to 19948 states and 26095 transitions. [2020-10-13 09:31:07,672 INFO L78 Accepts]: Start accepts. Automaton has 19948 states and 26095 transitions. Word has length 186 [2020-10-13 09:31:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:31:07,672 INFO L479 AbstractCegarLoop]: Abstraction has 19948 states and 26095 transitions. [2020-10-13 09:31:07,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:31:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19948 states and 26095 transitions. [2020-10-13 09:31:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 09:31:07,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:31:07,681 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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 09:31:07,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 09:31:07,681 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:31:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:31:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash -176144787, now seen corresponding path program 1 times [2020-10-13 09:31:07,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:31:07,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507533037] [2020-10-13 09:31:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:31:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:07,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:09,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:09,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 09:31:09,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:31:09,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-10-13 09:31:09,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 09:31:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-10-13 09:31:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 09:31:09,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:09,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:31:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:09,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:09,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:31:09,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:09,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:31:09,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:31:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:31:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:31:09,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:31:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:09,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:09,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 09:31:09,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:09,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-13 09:31:09,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 09:31:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:09,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-13 09:31:09,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:31:10,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507533037] [2020-10-13 09:31:10,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:31:10,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:31:10,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892335656] [2020-10-13 09:31:10,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:31:10,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:31:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:31:10,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:31:10,077 INFO L87 Difference]: Start difference. First operand 19948 states and 26095 transitions. Second operand 6 states. [2020-10-13 09:31:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:31:37,595 INFO L93 Difference]: Finished difference Result 53086 states and 73779 transitions. [2020-10-13 09:31:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:31:37,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 197 [2020-10-13 09:31:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:31:37,694 INFO L225 Difference]: With dead ends: 53086 [2020-10-13 09:31:37,694 INFO L226 Difference]: Without dead ends: 33144 [2020-10-13 09:31:37,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:31:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33144 states. [2020-10-13 09:31:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33144 to 29646. [2020-10-13 09:31:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29646 states. [2020-10-13 09:31:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29646 states to 29646 states and 40422 transitions. [2020-10-13 09:31:39,575 INFO L78 Accepts]: Start accepts. Automaton has 29646 states and 40422 transitions. Word has length 197 [2020-10-13 09:31:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:31:39,575 INFO L479 AbstractCegarLoop]: Abstraction has 29646 states and 40422 transitions. [2020-10-13 09:31:39,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:31:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 29646 states and 40422 transitions. [2020-10-13 09:31:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-13 09:31:39,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:31:39,587 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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 09:31:39,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 09:31:39,588 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:31:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:31:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1595786895, now seen corresponding path program 1 times [2020-10-13 09:31:39,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:31:39,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785729133] [2020-10-13 09:31:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:31:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:39,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:40,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:41,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:41,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-13 09:31:41,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:31:41,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-13 09:31:41,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:31:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-13 09:31:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 09:31:41,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:41,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:31:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:41,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:41,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:41,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:31:41,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:41,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:31:41,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:41,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:31:41,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:41,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:31:41,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:41,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:31:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:41,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:41,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 09:31:41,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:41,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 09:31:41,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:31:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-13 09:31:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:31:41,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785729133] [2020-10-13 09:31:41,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:31:41,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:31:41,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924103279] [2020-10-13 09:31:41,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:31:41,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:31:41,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:31:41,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:31:41,925 INFO L87 Difference]: Start difference. First operand 29646 states and 40422 transitions. Second operand 5 states.