/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:09:55,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:09:55,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:09:55,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:09:55,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:09:55,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:09:55,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:09:55,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:09:55,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:09:55,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:09:55,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:09:55,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:09:55,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:09:55,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:09:55,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:09:55,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:09:55,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:09:55,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:09:55,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:09:55,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:09:55,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:09:55,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:09:55,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:09:55,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:09:55,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:09:55,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:09:55,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:09:55,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:09:55,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:09:55,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:09:55,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:09:55,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:09:55,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:09:55,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:09:55,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:09:55,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:09:55,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:09:55,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:09:55,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:09:55,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:09:55,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:09:55,475 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 [2020-10-28 12:09:55,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:09:55,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:09:55,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:09:55,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:09:55,532 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:09:55,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:09:55,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:09:55,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:09:55,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:09:55,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:09:55,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:09:55,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:09:55,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:09:55,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:09:55,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:09:55,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:09:55,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:09:55,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:09:55,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:09:55,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:09:55,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:09:55,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:09:55,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:09:55,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:09:55,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:09:55,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:09:55,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:09:55,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:09:55,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:09:55,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:09:55,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:09:55,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:09:55,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:09:55,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:09:55,977 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:09:55,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2020-10-28 12:09:56,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fe7e2940/82044293529246d4a9c94f532e6a980e/FLAG26d4ae53b [2020-10-28 12:09:56,851 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:09:56,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2020-10-28 12:09:56,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fe7e2940/82044293529246d4a9c94f532e6a980e/FLAG26d4ae53b [2020-10-28 12:09:57,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fe7e2940/82044293529246d4a9c94f532e6a980e [2020-10-28 12:09:57,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:09:57,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:09:57,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:09:57,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:09:57,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:09:57,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:09:57" (1/1) ... [2020-10-28 12:09:57,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479bef34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:57, skipping insertion in model container [2020-10-28 12:09:57,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:09:57" (1/1) ... [2020-10-28 12:09:57,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:09:57,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:09:57,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:09:57,902 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:09:58,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:09:58,110 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:09:58,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58 WrapperNode [2020-10-28 12:09:58,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:09:58,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:09:58,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:09:58,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:09:58,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (1/1) ... [2020-10-28 12:09:58,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:09:58,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:09:58,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:09:58,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:09:58,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (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 [2020-10-28 12:09:58,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:09:58,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:09:58,408 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:09:58,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:09:58,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:09:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:09:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:09:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:09:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:09:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:09:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:09:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:09:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:09:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:09:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:09:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:09:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:09:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:09:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:10:00,655 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:10:00,656 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:10:00,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:10:00 BoogieIcfgContainer [2020-10-28 12:10:00,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:10:00,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:10:00,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:10:00,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:10:00,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:09:57" (1/3) ... [2020-10-28 12:10:00,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442e18df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:10:00, skipping insertion in model container [2020-10-28 12:10:00,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:58" (2/3) ... [2020-10-28 12:10:00,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442e18df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:10:00, skipping insertion in model container [2020-10-28 12:10:00,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:10:00" (3/3) ... [2020-10-28 12:10:00,674 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2020-10-28 12:10:00,686 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:10:00,692 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:10:00,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:10:00,759 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:10:00,760 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:10:00,760 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:10:00,760 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:10:00,760 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:10:00,760 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:10:00,760 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:10:00,761 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:10:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-28 12:10:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 12:10:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:00,815 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] [2020-10-28 12:10:00,815 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:00,826 INFO L82 PathProgramCache]: Analyzing trace with hash 866073966, now seen corresponding path program 1 times [2020-10-28 12:10:00,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:00,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615646085] [2020-10-28 12:10:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:01,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 12:10:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-28 12:10:01,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:01,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:10:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:10:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 12:10:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:10:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:01,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:01,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:01,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 12:10:01,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:01,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:10:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:10:02,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615646085] [2020-10-28 12:10:02,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:10:02,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:10:02,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893045265] [2020-10-28 12:10:02,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:10:02,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:02,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:10:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:10:02,049 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 4 states. [2020-10-28 12:10:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:05,187 INFO L93 Difference]: Finished difference Result 811 states and 1410 transitions. [2020-10-28 12:10:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:10:05,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 12:10:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:05,208 INFO L225 Difference]: With dead ends: 811 [2020-10-28 12:10:05,208 INFO L226 Difference]: Without dead ends: 435 [2020-10-28 12:10:05,219 INFO L677 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 [2020-10-28 12:10:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-28 12:10:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 429. [2020-10-28 12:10:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-28 12:10:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 618 transitions. [2020-10-28 12:10:05,317 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 618 transitions. Word has length 43 [2020-10-28 12:10:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:05,317 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 618 transitions. [2020-10-28 12:10:05,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:10:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 618 transitions. [2020-10-28 12:10:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 12:10:05,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:05,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:10:05,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:10:05,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1783180269, now seen corresponding path program 1 times [2020-10-28 12:10:05,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:05,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120584258] [2020-10-28 12:10:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:05,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:06,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:07,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:07,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:10:07,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:10:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2358 [2020-10-28 12:10:07,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:07,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:07,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:10:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:10:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 12:10:07,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:07,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:07,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:07,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:07,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:07,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 12:10:07,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:07,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:10:07,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:07,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:08,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:08,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:08,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 12:10:08,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 12:10:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:08,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:10:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 12:10:08,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:10:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120584258] [2020-10-28 12:10:08,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:10:08,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 12:10:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843814788] [2020-10-28 12:10:08,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:10:08,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:10:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:10:08,277 INFO L87 Difference]: Start difference. First operand 429 states and 618 transitions. Second operand 8 states. [2020-10-28 12:10:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:13,158 INFO L93 Difference]: Finished difference Result 1663 states and 2474 transitions. [2020-10-28 12:10:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 12:10:13,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 115 [2020-10-28 12:10:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:13,176 INFO L225 Difference]: With dead ends: 1663 [2020-10-28 12:10:13,176 INFO L226 Difference]: Without dead ends: 1240 [2020-10-28 12:10:13,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 12:10:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-10-28 12:10:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1204. [2020-10-28 12:10:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2020-10-28 12:10:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1689 transitions. [2020-10-28 12:10:13,281 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1689 transitions. Word has length 115 [2020-10-28 12:10:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:13,282 INFO L481 AbstractCegarLoop]: Abstraction has 1204 states and 1689 transitions. [2020-10-28 12:10:13,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:10:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1689 transitions. [2020-10-28 12:10:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 12:10:13,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:13,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:10:13,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:10:13,288 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash 988732689, now seen corresponding path program 1 times [2020-10-28 12:10:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:13,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702470953] [2020-10-28 12:10:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:13,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:13,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:14,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:14,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 12:10:14,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:10:14,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1527 [2020-10-28 12:10:14,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:14,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:14,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:10:14,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:10:14,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 12:10:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:15,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:15,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:15,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:15,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:15,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:15,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:10:15,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:15,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:15,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:15,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:15,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:10:15,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:15,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:15,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:15,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:15,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:10:15,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:15,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 12:10:15,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:15,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:15,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:15,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:10:15,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 12:10:15,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:10:15,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702470953] [2020-10-28 12:10:15,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:10:15,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:10:15,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295735202] [2020-10-28 12:10:15,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:10:15,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:15,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:10:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:10:15,458 INFO L87 Difference]: Start difference. First operand 1204 states and 1689 transitions. Second operand 7 states. [2020-10-28 12:10:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:18,997 INFO L93 Difference]: Finished difference Result 3214 states and 4530 transitions. [2020-10-28 12:10:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:10:18,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-10-28 12:10:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:19,010 INFO L225 Difference]: With dead ends: 3214 [2020-10-28 12:10:19,010 INFO L226 Difference]: Without dead ends: 2016 [2020-10-28 12:10:19,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:10:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2020-10-28 12:10:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1803. [2020-10-28 12:10:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2020-10-28 12:10:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2362 transitions. [2020-10-28 12:10:19,117 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2362 transitions. Word has length 116 [2020-10-28 12:10:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:19,119 INFO L481 AbstractCegarLoop]: Abstraction has 1803 states and 2362 transitions. [2020-10-28 12:10:19,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:10:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2362 transitions. [2020-10-28 12:10:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 12:10:19,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:19,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:10:19,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:10:19,136 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash -476867655, now seen corresponding path program 1 times [2020-10-28 12:10:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:19,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872415197] [2020-10-28 12:10:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:19,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:20,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-28 12:10:20,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 12:10:20,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:20,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:20,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:20,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:20,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:20,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:20,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:10:20,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:20,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:20,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:20,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:20,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:20,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:10:20,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 12:10:20,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:20,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:10:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:10:20,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872415197] [2020-10-28 12:10:20,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:20,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:10:20,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431744192] [2020-10-28 12:10:20,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:10:20,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:20,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:10:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:10:20,650 INFO L87 Difference]: Start difference. First operand 1803 states and 2362 transitions. Second operand 5 states. [2020-10-28 12:10:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:23,593 INFO L93 Difference]: Finished difference Result 4380 states and 6013 transitions. [2020-10-28 12:10:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:10:23,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-28 12:10:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:23,622 INFO L225 Difference]: With dead ends: 4380 [2020-10-28 12:10:23,623 INFO L226 Difference]: Without dead ends: 2583 [2020-10-28 12:10:23,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:10:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2020-10-28 12:10:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2571. [2020-10-28 12:10:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2571 states. [2020-10-28 12:10:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 3361 transitions. [2020-10-28 12:10:23,765 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 3361 transitions. Word has length 159 [2020-10-28 12:10:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:23,766 INFO L481 AbstractCegarLoop]: Abstraction has 2571 states and 3361 transitions. [2020-10-28 12:10:23,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:10:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 3361 transitions. [2020-10-28 12:10:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 12:10:23,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:23,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:10:23,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:10:23,770 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1331185766, now seen corresponding path program 1 times [2020-10-28 12:10:23,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:23,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625476837] [2020-10-28 12:10:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:24,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:24,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 12:10:24,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-28 12:10:24,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:24,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:10:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 12:10:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:24,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:24,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:24,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:10:24,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:24,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:24,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:24,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:24,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:24,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:24,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:10:24,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:24,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 12:10:24,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:24,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:24,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:24,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:10:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:10:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:10:24,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625476837] [2020-10-28 12:10:24,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:24,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:10:24,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529689692] [2020-10-28 12:10:24,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:10:24,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:24,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:10:24,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:10:24,741 INFO L87 Difference]: Start difference. First operand 2571 states and 3361 transitions. Second operand 6 states. [2020-10-28 12:10:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:28,857 INFO L93 Difference]: Finished difference Result 6709 states and 8910 transitions. [2020-10-28 12:10:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:10:28,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2020-10-28 12:10:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:28,884 INFO L225 Difference]: With dead ends: 6709 [2020-10-28 12:10:28,885 INFO L226 Difference]: Without dead ends: 4144 [2020-10-28 12:10:28,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:10:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2020-10-28 12:10:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3546. [2020-10-28 12:10:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2020-10-28 12:10:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 4668 transitions. [2020-10-28 12:10:29,028 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 4668 transitions. Word has length 174 [2020-10-28 12:10:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:29,029 INFO L481 AbstractCegarLoop]: Abstraction has 3546 states and 4668 transitions. [2020-10-28 12:10:29,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:10:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 4668 transitions. [2020-10-28 12:10:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 12:10:29,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:29,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-10-28 12:10:29,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:10:29,036 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:29,037 INFO L82 PathProgramCache]: Analyzing trace with hash -777445750, now seen corresponding path program 1 times [2020-10-28 12:10:29,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:29,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127878491] [2020-10-28 12:10:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:30,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:30,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-28 12:10:30,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:10:30,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-10-28 12:10:30,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:30,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-28 12:10:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:10:30,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:31,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:31,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:31,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:31,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:31,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:10:31,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:31,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:31,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:31,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:31,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:31,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:31,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:31,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:31,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:31,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:10:31,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 12:10:31,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:31,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:10:31,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:31,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:10:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:31,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:31,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:31,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:10:31,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:31,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 12:10:31,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:31,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:10:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:10:31,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:10:31,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127878491] [2020-10-28 12:10:31,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:31,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:10:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496510855] [2020-10-28 12:10:31,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:10:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:31,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:10:31,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:10:31,721 INFO L87 Difference]: Start difference. First operand 3546 states and 4668 transitions. Second operand 7 states. [2020-10-28 12:10:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:35,298 INFO L93 Difference]: Finished difference Result 9227 states and 12431 transitions. [2020-10-28 12:10:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:10:35,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-28 12:10:35,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:35,337 INFO L225 Difference]: With dead ends: 9227 [2020-10-28 12:10:35,337 INFO L226 Difference]: Without dead ends: 5687 [2020-10-28 12:10:35,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:10:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2020-10-28 12:10:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 4349. [2020-10-28 12:10:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4349 states. [2020-10-28 12:10:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 5633 transitions. [2020-10-28 12:10:35,531 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 5633 transitions. Word has length 253 [2020-10-28 12:10:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:35,532 INFO L481 AbstractCegarLoop]: Abstraction has 4349 states and 5633 transitions. [2020-10-28 12:10:35,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:10:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 5633 transitions. [2020-10-28 12:10:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 12:10:35,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:35,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-10-28 12:10:35,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:10:35,541 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1891595870, now seen corresponding path program 1 times [2020-10-28 12:10:35,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:35,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618711114] [2020-10-28 12:10:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:35,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:36,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:36,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-28 12:10:36,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:10:36,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-28 12:10:36,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:36,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-28 12:10:36,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:10:36,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:37,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:37,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:37,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:37,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:37,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:10:37,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:37,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:37,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:37,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:37,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:37,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:37,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:37,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:37,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:10:37,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:37,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 12:10:37,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:37,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:37,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:37,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:37,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:10:37,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:37,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:10:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:37,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:37,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:10:37,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:37,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 12:10:37,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:37,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:10:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:10:37,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:10:37,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618711114] [2020-10-28 12:10:37,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:37,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:10:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369494844] [2020-10-28 12:10:37,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:10:37,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:37,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:10:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:10:37,776 INFO L87 Difference]: Start difference. First operand 4349 states and 5633 transitions. Second operand 7 states. [2020-10-28 12:10:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:41,379 INFO L93 Difference]: Finished difference Result 10628 states and 14263 transitions. [2020-10-28 12:10:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:10:41,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 263 [2020-10-28 12:10:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:41,423 INFO L225 Difference]: With dead ends: 10628 [2020-10-28 12:10:41,424 INFO L226 Difference]: Without dead ends: 6285 [2020-10-28 12:10:41,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:10:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2020-10-28 12:10:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5318. [2020-10-28 12:10:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5318 states. [2020-10-28 12:10:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 6865 transitions. [2020-10-28 12:10:41,628 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 6865 transitions. Word has length 263 [2020-10-28 12:10:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:41,629 INFO L481 AbstractCegarLoop]: Abstraction has 5318 states and 6865 transitions. [2020-10-28 12:10:41,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:10:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 6865 transitions. [2020-10-28 12:10:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 12:10:41,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:41,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-10-28 12:10:41,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:10:41,639 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash 277574217, now seen corresponding path program 1 times [2020-10-28 12:10:41,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:41,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933642857] [2020-10-28 12:10:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:41,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:43,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:44,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:44,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-28 12:10:44,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:10:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2733 [2020-10-28 12:10:44,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:44,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 234 [2020-10-28 12:10:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 12:10:44,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:10:44,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:44,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:44,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:44,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:44,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:10:44,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:44,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:44,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:44,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:44,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:44,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:10:44,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 12:10:44,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:44,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:44,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:44,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:10:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:44,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:44,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:44,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 12:10:44,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:44,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-28 12:10:44,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:44,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 12:10:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-28 12:10:45,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933642857] [2020-10-28 12:10:45,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:10:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640332790] [2020-10-28 12:10:45,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:10:45,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:10:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:10:45,078 INFO L87 Difference]: Start difference. First operand 5318 states and 6865 transitions. Second operand 5 states. [2020-10-28 12:10:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:48,457 INFO L93 Difference]: Finished difference Result 12715 states and 16894 transitions. [2020-10-28 12:10:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:10:48,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2020-10-28 12:10:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:48,490 INFO L225 Difference]: With dead ends: 12715 [2020-10-28 12:10:48,490 INFO L226 Difference]: Without dead ends: 6639 [2020-10-28 12:10:48,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:10:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-10-28 12:10:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6635. [2020-10-28 12:10:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6635 states. [2020-10-28 12:10:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 8509 transitions. [2020-10-28 12:10:48,704 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 8509 transitions. Word has length 265 [2020-10-28 12:10:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:48,705 INFO L481 AbstractCegarLoop]: Abstraction has 6635 states and 8509 transitions. [2020-10-28 12:10:48,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:10:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 8509 transitions. [2020-10-28 12:10:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-28 12:10:48,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:48,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-10-28 12:10:48,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:10:48,714 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash -465274197, now seen corresponding path program 1 times [2020-10-28 12:10:48,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:48,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488592174] [2020-10-28 12:10:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:49,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:49,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-28 12:10:49,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:49,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-28 12:10:49,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:49,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:10:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 12:10:49,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:49,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:49,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:49,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:49,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:49,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:49,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:10:49,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:49,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:49,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:49,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:49,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:10:49,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 12:10:49,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:49,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:10:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:49,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:10:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:49,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:49,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:49,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:10:49,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:49,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-28 12:10:49,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:49,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:49,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:49,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:10:49,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:10:49,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:10:49,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488592174] [2020-10-28 12:10:49,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:49,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:10:49,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070768259] [2020-10-28 12:10:49,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:10:49,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:10:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:10:49,990 INFO L87 Difference]: Start difference. First operand 6635 states and 8509 transitions. Second operand 7 states. [2020-10-28 12:10:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:10:55,148 INFO L93 Difference]: Finished difference Result 15613 states and 20350 transitions. [2020-10-28 12:10:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:10:55,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 268 [2020-10-28 12:10:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:10:55,190 INFO L225 Difference]: With dead ends: 15613 [2020-10-28 12:10:55,190 INFO L226 Difference]: Without dead ends: 8984 [2020-10-28 12:10:55,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:10:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8984 states. [2020-10-28 12:10:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8984 to 8210. [2020-10-28 12:10:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8210 states. [2020-10-28 12:10:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8210 states to 8210 states and 10567 transitions. [2020-10-28 12:10:55,442 INFO L78 Accepts]: Start accepts. Automaton has 8210 states and 10567 transitions. Word has length 268 [2020-10-28 12:10:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:10:55,443 INFO L481 AbstractCegarLoop]: Abstraction has 8210 states and 10567 transitions. [2020-10-28 12:10:55,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:10:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8210 states and 10567 transitions. [2020-10-28 12:10:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-28 12:10:55,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:10:55,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-10-28 12:10:55,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 12:10:55,455 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:10:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:10:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 369225408, now seen corresponding path program 1 times [2020-10-28 12:10:55,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:10:55,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989315318] [2020-10-28 12:10:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:10:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:55,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:56,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:57,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:57,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-28 12:10:57,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:10:57,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-10-28 12:10:57,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:57,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:57,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:57,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-28 12:10:57,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:10:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:10:57,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:10:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:57,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:57,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:10:57,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:57,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:10:57,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:57,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:10:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:10:57,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:57,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:10:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:57,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:57,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:57,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:10:57,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 12:10:57,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:57,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:10:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:10:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 12:10:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:57,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-28 12:10:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:10:57,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:10:57,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:10:57,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:10:57,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:10:57,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-28 12:10:57,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:10:57,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:10:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:10:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:10:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:10:57,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:10:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:10:57,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989315318] [2020-10-28 12:10:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:10:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:10:57,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814533283] [2020-10-28 12:10:57,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:10:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:10:57,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:10:57,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:10:57,978 INFO L87 Difference]: Start difference. First operand 8210 states and 10567 transitions. Second operand 7 states. [2020-10-28 12:11:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:01,739 INFO L93 Difference]: Finished difference Result 17020 states and 21886 transitions. [2020-10-28 12:11:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:11:01,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-28 12:11:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:01,777 INFO L225 Difference]: With dead ends: 17020 [2020-10-28 12:11:01,777 INFO L226 Difference]: Without dead ends: 8816 [2020-10-28 12:11:01,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:11:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2020-10-28 12:11:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 8800. [2020-10-28 12:11:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8800 states. [2020-10-28 12:11:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8800 states to 8800 states and 11260 transitions. [2020-10-28 12:11:02,045 INFO L78 Accepts]: Start accepts. Automaton has 8800 states and 11260 transitions. Word has length 284 [2020-10-28 12:11:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:02,046 INFO L481 AbstractCegarLoop]: Abstraction has 8800 states and 11260 transitions. [2020-10-28 12:11:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:11:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8800 states and 11260 transitions. [2020-10-28 12:11:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 12:11:02,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:02,064 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:11:02,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 12:11:02,064 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1032511609, now seen corresponding path program 1 times [2020-10-28 12:11:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:02,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146540320] [2020-10-28 12:11:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:02,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:03,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:03,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 353 [2020-10-28 12:11:03,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:11:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-28 12:11:03,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:03,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-28 12:11:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:11:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:03,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:03,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:03,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:03,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:03,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:03,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:11:03,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:03,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:03,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:03,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:03,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:03,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:03,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:11:03,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 12:11:03,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:03,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:04,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:11:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:04,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:04,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:04,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 12:11:04,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:04,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 12:11:04,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:04,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 12:11:04,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:11:04,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-28 12:11:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:04,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:04,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:04,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:11:04,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:04,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-28 12:11:04,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:04,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:04,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:04,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:11:04,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:11:04,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 282 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-28 12:11:04,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146540320] [2020-10-28 12:11:04,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:04,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:11:04,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315622971] [2020-10-28 12:11:04,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:11:04,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:04,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:11:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:11:04,556 INFO L87 Difference]: Start difference. First operand 8800 states and 11260 transitions. Second operand 7 states. [2020-10-28 12:11:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:08,148 INFO L93 Difference]: Finished difference Result 18009 states and 23167 transitions. [2020-10-28 12:11:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:11:08,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 337 [2020-10-28 12:11:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:08,187 INFO L225 Difference]: With dead ends: 18009 [2020-10-28 12:11:08,187 INFO L226 Difference]: Without dead ends: 9215 [2020-10-28 12:11:08,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:11:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2020-10-28 12:11:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 8814. [2020-10-28 12:11:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8814 states. [2020-10-28 12:11:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 11189 transitions. [2020-10-28 12:11:08,423 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 11189 transitions. Word has length 337 [2020-10-28 12:11:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:08,423 INFO L481 AbstractCegarLoop]: Abstraction has 8814 states and 11189 transitions. [2020-10-28 12:11:08,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:11:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 11189 transitions. [2020-10-28 12:11:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-28 12:11:08,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:08,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:11:08,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 12:11:08,441 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1854000471, now seen corresponding path program 1 times [2020-10-28 12:11:08,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:08,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966280875] [2020-10-28 12:11:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:09,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:10,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:10,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-28 12:11:10,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:11:10,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1958 [2020-10-28 12:11:10,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:10,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-28 12:11:10,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:11:10,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:10,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:10,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:10,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:10,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:10,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:10,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:11:10,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:10,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:10,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:10,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:10,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:10,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:10,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:10,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:10,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:11:10,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:10,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 12:11:10,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:10,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:10,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:10,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:11:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:10,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:10,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:11:10,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:10,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 12:11:10,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:10,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:10,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:10,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:10,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:11:10,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-28 12:11:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:10,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:11,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:11,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:11:11,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-28 12:11:11,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:11,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:11:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:11:11,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:11:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-28 12:11:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966280875] [2020-10-28 12:11:11,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:11,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:11:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213600826] [2020-10-28 12:11:11,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:11:11,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:11:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:11:11,365 INFO L87 Difference]: Start difference. First operand 8814 states and 11189 transitions. Second operand 7 states. [2020-10-28 12:11:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:14,796 INFO L93 Difference]: Finished difference Result 18399 states and 23252 transitions. [2020-10-28 12:11:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:11:14,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-28 12:11:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:14,831 INFO L225 Difference]: With dead ends: 18399 [2020-10-28 12:11:14,831 INFO L226 Difference]: Without dead ends: 9591 [2020-10-28 12:11:14,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:11:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9591 states. [2020-10-28 12:11:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9591 to 9384. [2020-10-28 12:11:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9384 states. [2020-10-28 12:11:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9384 states to 9384 states and 11822 transitions. [2020-10-28 12:11:15,079 INFO L78 Accepts]: Start accepts. Automaton has 9384 states and 11822 transitions. Word has length 342 [2020-10-28 12:11:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:15,080 INFO L481 AbstractCegarLoop]: Abstraction has 9384 states and 11822 transitions. [2020-10-28 12:11:15,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:11:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 9384 states and 11822 transitions. [2020-10-28 12:11:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-28 12:11:15,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:15,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2020-10-28 12:11:15,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 12:11:15,099 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1689882361, now seen corresponding path program 1 times [2020-10-28 12:11:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:15,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719746758] [2020-10-28 12:11:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:15,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:15,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:15,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 363 [2020-10-28 12:11:15,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 12:11:15,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:15,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:15,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:15,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:15,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:15,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:15,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:11:15,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:15,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:15,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:16,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:16,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:16,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:16,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:11:16,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:16,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 12:11:16,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:16,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:16,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:16,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:11:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:16,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:16,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:16,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 12:11:16,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 12:11:16,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719746758] [2020-10-28 12:11:16,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:16,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:11:16,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522781811] [2020-10-28 12:11:16,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:11:16,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:16,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:11:16,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:11:16,545 INFO L87 Difference]: Start difference. First operand 9384 states and 11822 transitions. Second operand 5 states. [2020-10-28 12:11:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:19,839 INFO L93 Difference]: Finished difference Result 21256 states and 27264 transitions. [2020-10-28 12:11:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:11:19,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2020-10-28 12:11:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:19,878 INFO L225 Difference]: With dead ends: 21256 [2020-10-28 12:11:19,878 INFO L226 Difference]: Without dead ends: 12066 [2020-10-28 12:11:19,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:11:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12066 states. [2020-10-28 12:11:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12066 to 11293. [2020-10-28 12:11:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11293 states. [2020-10-28 12:11:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11293 states to 11293 states and 14430 transitions. [2020-10-28 12:11:20,131 INFO L78 Accepts]: Start accepts. Automaton has 11293 states and 14430 transitions. Word has length 349 [2020-10-28 12:11:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:20,132 INFO L481 AbstractCegarLoop]: Abstraction has 11293 states and 14430 transitions. [2020-10-28 12:11:20,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:11:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11293 states and 14430 transitions. [2020-10-28 12:11:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-28 12:11:20,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:20,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:11:20,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 12:11:20,156 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash 17305083, now seen corresponding path program 1 times [2020-10-28 12:11:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:20,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316104788] [2020-10-28 12:11:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:20,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:22,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:22,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 380 [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1767 [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-28 12:11:22,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:11:22,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:22,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:22,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:22,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:22,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:22,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:22,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:22,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:22,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:11:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:22,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:22,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:22,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 12:11:22,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:22,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 12:11:22,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:22,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 12:11:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:22,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-28 12:11:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:22,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:22,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:22,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:11:22,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 12:11:22,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:22,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:22,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:22,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:11:22,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:11:22,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 12:11:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316104788] [2020-10-28 12:11:22,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:22,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:11:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284783010] [2020-10-28 12:11:22,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:11:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:11:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:11:22,843 INFO L87 Difference]: Start difference. First operand 11293 states and 14430 transitions. Second operand 7 states. [2020-10-28 12:11:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:27,853 INFO L93 Difference]: Finished difference Result 27301 states and 34790 transitions. [2020-10-28 12:11:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 12:11:27,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 364 [2020-10-28 12:11:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:27,906 INFO L225 Difference]: With dead ends: 27301 [2020-10-28 12:11:27,906 INFO L226 Difference]: Without dead ends: 14095 [2020-10-28 12:11:27,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:11:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14095 states. [2020-10-28 12:11:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14095 to 11444. [2020-10-28 12:11:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11444 states. [2020-10-28 12:11:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 14105 transitions. [2020-10-28 12:11:28,222 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 14105 transitions. Word has length 364 [2020-10-28 12:11:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:28,223 INFO L481 AbstractCegarLoop]: Abstraction has 11444 states and 14105 transitions. [2020-10-28 12:11:28,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:11:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 14105 transitions. [2020-10-28 12:11:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-28 12:11:28,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:28,239 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:11:28,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 12:11:28,239 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash 979436900, now seen corresponding path program 1 times [2020-10-28 12:11:28,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:28,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752842765] [2020-10-28 12:11:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:30,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:33,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:33,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-28 12:11:33,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:11:33,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 12:11:33,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:33,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:11:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 12:11:33,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:33,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:33,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:33,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:33,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:33,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:33,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:33,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:33,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:11:33,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:11:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:11:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:33,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:33,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:33,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:11:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 12:11:33,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:33,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-10-28 12:11:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:34,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:34,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:11:34,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:34,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 12:11:34,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:34,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-28 12:11:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:34,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 217 proven. 93 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-28 12:11:34,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752842765] [2020-10-28 12:11:34,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:34,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:11:34,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613156335] [2020-10-28 12:11:34,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:11:34,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:34,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:11:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:11:34,178 INFO L87 Difference]: Start difference. First operand 11444 states and 14105 transitions. Second operand 7 states. [2020-10-28 12:11:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:38,937 INFO L93 Difference]: Finished difference Result 24005 states and 29723 transitions. [2020-10-28 12:11:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:11:38,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 381 [2020-10-28 12:11:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:38,976 INFO L225 Difference]: With dead ends: 24005 [2020-10-28 12:11:38,977 INFO L226 Difference]: Without dead ends: 12754 [2020-10-28 12:11:38,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:11:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12754 states. [2020-10-28 12:11:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12754 to 12178. [2020-10-28 12:11:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12178 states. [2020-10-28 12:11:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12178 states to 12178 states and 14630 transitions. [2020-10-28 12:11:39,262 INFO L78 Accepts]: Start accepts. Automaton has 12178 states and 14630 transitions. Word has length 381 [2020-10-28 12:11:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:39,262 INFO L481 AbstractCegarLoop]: Abstraction has 12178 states and 14630 transitions. [2020-10-28 12:11:39,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:11:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 12178 states and 14630 transitions. [2020-10-28 12:11:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-28 12:11:39,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:39,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:11:39,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 12:11:39,277 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1372614058, now seen corresponding path program 1 times [2020-10-28 12:11:39,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:39,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317471713] [2020-10-28 12:11:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:39,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:43,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 444 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4149 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 303 [2020-10-28 12:11:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:11:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:43,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:43,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:43,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:43,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:43,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:11:43,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:43,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:43,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:43,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:43,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:43,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:43,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:43,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:43,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:11:43,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:43,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-28 12:11:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:43,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:43,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 12:11:43,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 12:11:43,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:43,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 12:11:43,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:43,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2020-10-28 12:11:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:44,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:44,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:44,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:11:44,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:44,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 12:11:44,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:44,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:11:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:11:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:11:44,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-10-28 12:11:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317471713] [2020-10-28 12:11:44,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:44,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:11:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761272973] [2020-10-28 12:11:44,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:11:44,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:11:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:11:44,605 INFO L87 Difference]: Start difference. First operand 12178 states and 14630 transitions. Second operand 7 states. [2020-10-28 12:11:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:11:48,464 INFO L93 Difference]: Finished difference Result 24556 states and 29515 transitions. [2020-10-28 12:11:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:11:48,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 428 [2020-10-28 12:11:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:11:48,494 INFO L225 Difference]: With dead ends: 24556 [2020-10-28 12:11:48,494 INFO L226 Difference]: Without dead ends: 12572 [2020-10-28 12:11:48,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:11:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2020-10-28 12:11:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 12564. [2020-10-28 12:11:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12564 states. [2020-10-28 12:11:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12564 states to 12564 states and 15010 transitions. [2020-10-28 12:11:48,768 INFO L78 Accepts]: Start accepts. Automaton has 12564 states and 15010 transitions. Word has length 428 [2020-10-28 12:11:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:11:48,769 INFO L481 AbstractCegarLoop]: Abstraction has 12564 states and 15010 transitions. [2020-10-28 12:11:48,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:11:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 12564 states and 15010 transitions. [2020-10-28 12:11:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-10-28 12:11:48,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:11:48,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-10-28 12:11:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 12:11:48,788 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:11:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:11:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1266716096, now seen corresponding path program 1 times [2020-10-28 12:11:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:11:48,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376561847] [2020-10-28 12:11:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:11:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:49,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:49,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:53,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:53,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 342 [2020-10-28 12:11:53,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 12:11:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:54,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:11:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:54,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:54,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:54,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:11:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:54,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:54,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:11:54,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:54,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:11:54,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:54,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-28 12:11:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:54,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:54,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 12:11:54,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 12:11:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:54,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-10-28 12:11:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:11:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:11:54,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 12:11:54,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:11:54,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:11:54,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:11:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 258 proven. 36 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-10-28 12:11:55,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376561847] [2020-10-28 12:11:55,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:11:55,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:11:55,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588627377] [2020-10-28 12:11:55,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:11:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:11:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:11:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:11:55,015 INFO L87 Difference]: Start difference. First operand 12564 states and 15010 transitions. Second operand 8 states. [2020-10-28 12:12:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:12:00,304 INFO L93 Difference]: Finished difference Result 30759 states and 37793 transitions. [2020-10-28 12:12:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 12:12:00,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 467 [2020-10-28 12:12:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:12:00,356 INFO L225 Difference]: With dead ends: 30759 [2020-10-28 12:12:00,356 INFO L226 Difference]: Without dead ends: 18389 [2020-10-28 12:12:00,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:12:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18389 states. [2020-10-28 12:12:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18389 to 17918. [2020-10-28 12:12:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17918 states. [2020-10-28 12:12:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17918 states to 17918 states and 21318 transitions. [2020-10-28 12:12:00,825 INFO L78 Accepts]: Start accepts. Automaton has 17918 states and 21318 transitions. Word has length 467 [2020-10-28 12:12:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:12:00,826 INFO L481 AbstractCegarLoop]: Abstraction has 17918 states and 21318 transitions. [2020-10-28 12:12:00,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:12:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 17918 states and 21318 transitions. [2020-10-28 12:12:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-10-28 12:12:00,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:12:00,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:12:00,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 12:12:00,851 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:12:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:12:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash 870604486, now seen corresponding path program 1 times [2020-10-28 12:12:00,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:12:00,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253164216] [2020-10-28 12:12:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:12:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:01,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:01,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:02,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:05,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:05,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:05,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 504 [2020-10-28 12:12:05,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 12:12:05,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4918 [2020-10-28 12:12:05,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:05,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-28 12:12:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 12:12:05,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:12:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:06,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:06,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:06,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:12:06,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:06,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:12:06,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:06,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:06,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:06,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:12:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:06,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:06,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:06,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:12:06,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:06,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 12:12:06,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:06,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:06,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:06,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:12:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:06,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:06,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:12:06,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:06,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 12:12:06,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:06,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:06,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:06,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:06,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 12:12:06,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-28 12:12:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:06,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:06,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 12:12:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:06,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2020-10-28 12:12:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:06,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:06,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-28 12:12:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:06,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 347 proven. 93 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2020-10-28 12:12:06,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253164216] [2020-10-28 12:12:06,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:12:06,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:12:06,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642819298] [2020-10-28 12:12:06,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:12:06,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:12:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:12:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:12:06,914 INFO L87 Difference]: Start difference. First operand 17918 states and 21318 transitions. Second operand 7 states. [2020-10-28 12:12:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:12:10,578 INFO L93 Difference]: Finished difference Result 36255 states and 43231 transitions. [2020-10-28 12:12:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 12:12:10,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2020-10-28 12:12:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:12:10,617 INFO L225 Difference]: With dead ends: 36255 [2020-10-28 12:12:10,617 INFO L226 Difference]: Without dead ends: 18721 [2020-10-28 12:12:10,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:12:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18721 states. [2020-10-28 12:12:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18721 to 17920. [2020-10-28 12:12:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17920 states. [2020-10-28 12:12:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17920 states to 17920 states and 21264 transitions. [2020-10-28 12:12:11,049 INFO L78 Accepts]: Start accepts. Automaton has 17920 states and 21264 transitions. Word has length 486 [2020-10-28 12:12:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:12:11,049 INFO L481 AbstractCegarLoop]: Abstraction has 17920 states and 21264 transitions. [2020-10-28 12:12:11,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:12:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 17920 states and 21264 transitions. [2020-10-28 12:12:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-10-28 12:12:11,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:12:11,080 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:12:11,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 12:12:11,081 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:12:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:12:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash -160291411, now seen corresponding path program 1 times [2020-10-28 12:12:11,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:12:11,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076078017] [2020-10-28 12:12:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:12:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:11,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:16,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:16,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 576 [2020-10-28 12:12:16,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 324 [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:12:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:16,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:12:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:16,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:16,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:16,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:12:16,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:16,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:12:16,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:16,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:16,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:16,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:12:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:16,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:16,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:16,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:12:16,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:16,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 12:12:16,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:16,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:16,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:16,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:16,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:16,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:16,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:12:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:16,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:16,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:16,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 12:12:16,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-28 12:12:16,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:16,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:16,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:16,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-10-28 12:12:16,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:12:16,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:16,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-10-28 12:12:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:16,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:16,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:16,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 429 [2020-10-28 12:12:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:16,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:16,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:16,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:12:16,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:16,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 12:12:16,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:16,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-28 12:12:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:16,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 151 proven. 4 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-28 12:12:17,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076078017] [2020-10-28 12:12:17,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:12:17,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:12:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803266583] [2020-10-28 12:12:17,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:12:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:12:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:12:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:12:17,003 INFO L87 Difference]: Start difference. First operand 17920 states and 21264 transitions. Second operand 5 states. [2020-10-28 12:12:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:12:20,129 INFO L93 Difference]: Finished difference Result 35645 states and 42442 transitions. [2020-10-28 12:12:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:12:20,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 558 [2020-10-28 12:12:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:12:20,174 INFO L225 Difference]: With dead ends: 35645 [2020-10-28 12:12:20,174 INFO L226 Difference]: Without dead ends: 18109 [2020-10-28 12:12:20,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:12:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2020-10-28 12:12:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 16966. [2020-10-28 12:12:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16966 states. [2020-10-28 12:12:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16966 states to 16966 states and 19762 transitions. [2020-10-28 12:12:20,519 INFO L78 Accepts]: Start accepts. Automaton has 16966 states and 19762 transitions. Word has length 558 [2020-10-28 12:12:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:12:20,520 INFO L481 AbstractCegarLoop]: Abstraction has 16966 states and 19762 transitions. [2020-10-28 12:12:20,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:12:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 16966 states and 19762 transitions. [2020-10-28 12:12:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2020-10-28 12:12:20,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:12:20,537 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:12:20,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 12:12:20,537 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:12:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:12:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1980875165, now seen corresponding path program 1 times [2020-10-28 12:12:20,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:12:20,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255309420] [2020-10-28 12:12:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:12:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:20,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:25,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 608 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 466 [2020-10-28 12:12:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 12:12:25,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:25,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:12:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:25,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:25,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:12:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:25,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:25,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:25,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:12:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:25,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:25,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:25,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 12:12:25,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 12:12:25,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:25,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:25,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:25,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-28 12:12:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:26,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:26,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2020-10-28 12:12:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:26,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:26,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 12:12:26,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:26,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 12:12:26,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:26,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 12:12:26,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:26,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 459 [2020-10-28 12:12:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:26,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:26,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:26,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:12:26,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:26,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-28 12:12:26,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:26,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:26,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:12:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:12:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 546 proven. 2 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-10-28 12:12:26,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255309420] [2020-10-28 12:12:26,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:12:26,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:12:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883396794] [2020-10-28 12:12:26,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:12:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:12:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:12:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:12:26,789 INFO L87 Difference]: Start difference. First operand 16966 states and 19762 transitions. Second operand 7 states. [2020-10-28 12:12:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:12:30,471 INFO L93 Difference]: Finished difference Result 33596 states and 39151 transitions. [2020-10-28 12:12:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:12:30,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 588 [2020-10-28 12:12:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:12:30,500 INFO L225 Difference]: With dead ends: 33596 [2020-10-28 12:12:30,500 INFO L226 Difference]: Without dead ends: 17014 [2020-10-28 12:12:30,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:12:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17014 states. [2020-10-28 12:12:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17014 to 16807. [2020-10-28 12:12:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16807 states. [2020-10-28 12:12:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16807 states to 16807 states and 19267 transitions. [2020-10-28 12:12:31,042 INFO L78 Accepts]: Start accepts. Automaton has 16807 states and 19267 transitions. Word has length 588 [2020-10-28 12:12:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:12:31,045 INFO L481 AbstractCegarLoop]: Abstraction has 16807 states and 19267 transitions. [2020-10-28 12:12:31,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:12:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 16807 states and 19267 transitions. [2020-10-28 12:12:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2020-10-28 12:12:31,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:12:31,081 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:12:31,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 12:12:31,081 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:12:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:12:31,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2137017950, now seen corresponding path program 1 times [2020-10-28 12:12:31,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:12:31,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397359197] [2020-10-28 12:12:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:12:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:31,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:31,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:33,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:33,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 652 [2020-10-28 12:12:33,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 12:12:33,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-28 12:12:33,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:33,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:33,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:33,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:12:33,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 453 [2020-10-28 12:12:33,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:33,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:12:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:33,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:33,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:12:33,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:33,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:12:33,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:33,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:33,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:33,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:33,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:12:33,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:33,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:12:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:34,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 12:12:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:34,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:12:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:34,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 12:12:34,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:12:34,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 12:12:34,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:34,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 12:12:34,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:34,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-28 12:12:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:34,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 12:12:34,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:34,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-10-28 12:12:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:34,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:34,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:34,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:12:34,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:34,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 12:12:34,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:34,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:34,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:34,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-28 12:12:34,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:34,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-10-28 12:12:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397359197] [2020-10-28 12:12:35,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:12:35,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:12:35,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765858450] [2020-10-28 12:12:35,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:12:35,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:12:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:12:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:12:35,095 INFO L87 Difference]: Start difference. First operand 16807 states and 19267 transitions. Second operand 6 states. [2020-10-28 12:12:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:12:39,687 INFO L93 Difference]: Finished difference Result 32845 states and 37695 transitions. [2020-10-28 12:12:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:12:39,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 634 [2020-10-28 12:12:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:12:39,723 INFO L225 Difference]: With dead ends: 32845 [2020-10-28 12:12:39,723 INFO L226 Difference]: Without dead ends: 16422 [2020-10-28 12:12:39,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:12:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16422 states. [2020-10-28 12:12:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16422 to 16400. [2020-10-28 12:12:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16400 states. [2020-10-28 12:12:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 18773 transitions. [2020-10-28 12:12:39,974 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 18773 transitions. Word has length 634 [2020-10-28 12:12:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:12:39,975 INFO L481 AbstractCegarLoop]: Abstraction has 16400 states and 18773 transitions. [2020-10-28 12:12:39,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:12:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 18773 transitions. [2020-10-28 12:12:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2020-10-28 12:12:39,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:12:39,998 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:12:39,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 12:12:39,998 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:12:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:12:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1652236152, now seen corresponding path program 1 times [2020-10-28 12:12:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:12:39,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978870773] [2020-10-28 12:12:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:12:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:40,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:40,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 717 [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:45,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 576 [2020-10-28 12:12:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:12:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:45,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:12:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:12:45,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:45,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:12:45,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:45,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:12:45,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:12:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:12:45,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:45,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 12:12:45,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:45,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:45,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:45,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:45,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:12:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 12:12:45,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:45,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 12:12:45,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-28 12:12:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 12:12:45,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:45,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 12:12:45,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:45,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:45,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2020-10-28 12:12:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 12:12:45,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:45,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 12:12:45,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:45,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:45,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 459 [2020-10-28 12:12:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:45,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:45,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 12:12:45,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 12:12:45,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:45,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:12:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 12:12:45,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-10-28 12:12:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:46,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:12:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:12:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 677 proven. 2 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2020-10-28 12:12:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978870773] [2020-10-28 12:12:46,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:12:46,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:12:46,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133257278] [2020-10-28 12:12:46,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:12:46,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:12:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:12:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:12:46,699 INFO L87 Difference]: Start difference. First operand 16400 states and 18773 transitions. Second operand 8 states. [2020-10-28 12:12:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:12:53,779 INFO L93 Difference]: Finished difference Result 34376 states and 39324 transitions. [2020-10-28 12:12:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 12:12:53,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 695 [2020-10-28 12:12:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:12:53,813 INFO L225 Difference]: With dead ends: 34376 [2020-10-28 12:12:53,814 INFO L226 Difference]: Without dead ends: 18167 [2020-10-28 12:12:53,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 12:12:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18167 states. [2020-10-28 12:12:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18167 to 17374. [2020-10-28 12:12:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17374 states. [2020-10-28 12:12:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17374 states to 17374 states and 19704 transitions. [2020-10-28 12:12:54,121 INFO L78 Accepts]: Start accepts. Automaton has 17374 states and 19704 transitions. Word has length 695 [2020-10-28 12:12:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:12:54,122 INFO L481 AbstractCegarLoop]: Abstraction has 17374 states and 19704 transitions. [2020-10-28 12:12:54,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:12:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 17374 states and 19704 transitions. [2020-10-28 12:12:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2020-10-28 12:12:54,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:12:54,149 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 12:12:54,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 12:12:54,150 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:12:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:12:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash 824892701, now seen corresponding path program 1 times [2020-10-28 12:12:54,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:12:54,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72438813] [2020-10-28 12:12:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:12:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:55,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 770 [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:12:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 576 [2020-10-28 12:12:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 12:12:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:12:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:59,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:59,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:59,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:12:59,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:59,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:12:59,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:59,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:59,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:12:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:59,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:59,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:12:59,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:59,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 12:12:59,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:59,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:59,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:12:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:12:59,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:12:59,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:12:59,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:12:59,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:12:59,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:12:59,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-28 12:13:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:13:00,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:13:00,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:13:00,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 12:13:00,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:13:00,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 12:13:00,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:13:00,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:13:00,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:13:00,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:13:00,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:13:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:13:00,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2020-10-28 12:13:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:13:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:13:00,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:13:00,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 12:13:00,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:13:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 12:13:00,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:13:00,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:13:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:13:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:13:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:13:00,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:13:00,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 459 [2020-10-28 12:13:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:13:00,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:13:00,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:13:00,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 12:13:00,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:13:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 12:13:00,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:13:00,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:13:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:13:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:13:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 12:13:00,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:13:00,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-10-28 12:13:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:13:00,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:13:00,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 12:13:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:13:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 769 proven. 2 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2020-10-28 12:13:00,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72438813] [2020-10-28 12:13:00,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:13:00,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:13:00,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459852453] [2020-10-28 12:13:00,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:13:00,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:13:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:13:00,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:13:00,805 INFO L87 Difference]: Start difference. First operand 17374 states and 19704 transitions. Second operand 7 states. [2020-10-28 12:13:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:13:04,712 INFO L93 Difference]: Finished difference Result 34607 states and 39411 transitions. [2020-10-28 12:13:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:13:04,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 748 [2020-10-28 12:13:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:13:04,714 INFO L225 Difference]: With dead ends: 34607 [2020-10-28 12:13:04,714 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 12:13:04,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:13:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 12:13:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 12:13:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 12:13:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 12:13:04,746 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 748 [2020-10-28 12:13:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:13:04,746 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 12:13:04,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:13:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 12:13:04,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 12:13:04,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 12:13:04,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 12:13:05,052 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-28 12:13:05,618 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110 [2020-10-28 12:13:06,207 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110 [2020-10-28 12:13:06,443 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 106 [2020-10-28 12:13:09,642 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 535 DAG size of output: 493 [2020-10-28 12:13:11,293 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 493 [2020-10-28 12:13:11,524 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 32