/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/Problem03_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:12:12,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:12:12,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:12:12,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:12:12,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:12:12,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:12:12,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:12:12,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:12:12,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:12:12,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:12:12,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:12:12,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:12:12,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:12:12,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:12:12,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:12:12,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:12:12,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:12:12,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:12:12,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:12:12,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:12:12,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:12:12,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:12:12,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:12:12,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:12:12,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:12:12,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:12:12,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:12:12,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:12:12,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:12:12,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:12:12,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:12:12,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:12:12,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:12:12,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:12:12,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:12:12,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:12:12,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:12:12,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:12:12,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:12:12,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:12:12,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:12:12,712 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 10:12:12,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:12:12,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:12:12,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:12:12,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:12:12,771 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:12:12,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:12:12,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:12:12,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:12:12,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:12:12,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:12:12,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:12:12,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:12:12,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:12:12,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:12:12,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:12:12,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:12:12,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:12:12,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:12:12,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:12:12,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:12:12,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:12:12,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:12:12,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:12:12,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:12:12,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:12:12,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:12:12,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:12:12,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:12:12,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:12:12,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:12:13,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:12:13,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:12:13,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:12:13,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:12:13,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:12:13,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label11.c [2020-10-28 10:12:13,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872a6ce4f/209db61aaab842a5ba95a28509329737/FLAGec69921ac [2020-10-28 10:12:14,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:12:14,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c [2020-10-28 10:12:14,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872a6ce4f/209db61aaab842a5ba95a28509329737/FLAGec69921ac [2020-10-28 10:12:14,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872a6ce4f/209db61aaab842a5ba95a28509329737 [2020-10-28 10:12:14,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:12:14,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:12:14,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:12:14,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:12:14,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:12:14,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:12:14" (1/1) ... [2020-10-28 10:12:14,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53fb308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:14, skipping insertion in model container [2020-10-28 10:12:14,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:12:14" (1/1) ... [2020-10-28 10:12:14,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:12:14,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:12:15,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:12:15,300 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:12:15,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:12:15,752 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:12:15,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15 WrapperNode [2020-10-28 10:12:15,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:12:15,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:12:15,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:12:15,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:12:15,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (1/1) ... [2020-10-28 10:12:15,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:12:15,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:12:15,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:12:15,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:12:15,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (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 10:12:16,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:12:16,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:12:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:12:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:12:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:12:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:12:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:12:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:12:16,089 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:12:16,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:12:16,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:12:16,090 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:12:16,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:12:16,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:12:16,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:12:16,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:12:16,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:12:16,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:12:16,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:12:18,437 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:12:18,438 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:12:18,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:12:18 BoogieIcfgContainer [2020-10-28 10:12:18,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:12:18,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:12:18,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:12:18,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:12:18,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:12:14" (1/3) ... [2020-10-28 10:12:18,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512a7983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:12:18, skipping insertion in model container [2020-10-28 10:12:18,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:15" (2/3) ... [2020-10-28 10:12:18,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512a7983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:12:18, skipping insertion in model container [2020-10-28 10:12:18,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:12:18" (3/3) ... [2020-10-28 10:12:18,450 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label11.c [2020-10-28 10:12:18,463 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:12:18,469 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:12:18,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:12:18,517 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:12:18,517 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:12:18,518 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:12:18,518 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:12:18,518 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:12:18,518 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:12:18,518 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:12:18,518 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:12:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:12:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-28 10:12:18,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:18,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:18,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:18,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1274475408, now seen corresponding path program 1 times [2020-10-28 10:12:18,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:18,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255432409] [2020-10-28 10:12:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:19,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:23,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:23,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-28 10:12:23,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:23,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4198 [2020-10-28 10:12:23,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:23,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:12:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:12:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 10:12:23,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 10:12:23,844 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:23,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:23,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:23,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:23,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:23,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 10:12:23,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:23,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:23,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:23,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:23,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:12:23,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:24,087 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 10:12:24,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255432409] [2020-10-28 10:12:24,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:12:24,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 10:12:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372983713] [2020-10-28 10:12:24,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:24,116 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 5 states. [2020-10-28 10:12:24,427 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:25,226 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:30,178 INFO L93 Difference]: Finished difference Result 1109 states and 1970 transitions. [2020-10-28 10:12:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:12:30,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2020-10-28 10:12:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:30,204 INFO L225 Difference]: With dead ends: 1109 [2020-10-28 10:12:30,205 INFO L226 Difference]: Without dead ends: 697 [2020-10-28 10:12:30,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:12:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-28 10:12:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 473. [2020-10-28 10:12:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-28 10:12:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 723 transitions. [2020-10-28 10:12:30,373 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 723 transitions. Word has length 200 [2020-10-28 10:12:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:30,376 INFO L481 AbstractCegarLoop]: Abstraction has 473 states and 723 transitions. [2020-10-28 10:12:30,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 723 transitions. [2020-10-28 10:12:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 10:12:30,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:30,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:30,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:12:30,394 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash 692647329, now seen corresponding path program 1 times [2020-10-28 10:12:30,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:30,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893889070] [2020-10-28 10:12:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:31,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:31,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:34,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:34,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-28 10:12:34,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4079 [2020-10-28 10:12:34,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:34,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:34,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:34,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:12:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:12:34,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 10:12:34,983 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:34,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:34,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:35,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:35,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:12:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:35,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:35,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:35,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:35,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:35,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:35,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:12:35,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:35,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:35,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:35,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:35,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:35,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893889070] [2020-10-28 10:12:35,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:35,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956203815] [2020-10-28 10:12:35,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:35,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:35,221 INFO L87 Difference]: Start difference. First operand 473 states and 723 transitions. Second operand 5 states. [2020-10-28 10:12:35,749 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:39,220 INFO L93 Difference]: Finished difference Result 1376 states and 2134 transitions. [2020-10-28 10:12:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:39,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2020-10-28 10:12:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:39,230 INFO L225 Difference]: With dead ends: 1376 [2020-10-28 10:12:39,230 INFO L226 Difference]: Without dead ends: 909 [2020-10-28 10:12:39,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-10-28 10:12:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 898. [2020-10-28 10:12:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-28 10:12:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1322 transitions. [2020-10-28 10:12:39,281 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1322 transitions. Word has length 209 [2020-10-28 10:12:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:39,282 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1322 transitions. [2020-10-28 10:12:39,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1322 transitions. [2020-10-28 10:12:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 10:12:39,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:39,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:39,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:12:39,288 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash -596115123, now seen corresponding path program 1 times [2020-10-28 10:12:39,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:39,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84021857] [2020-10-28 10:12:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:39,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:39,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:44,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:44,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 10:12:44,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 10:12:44,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 10:12:44,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:44,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:44,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:12:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-28 10:12:44,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:44,819 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:44,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:44,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:44,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:44,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:44,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:12:44,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:44,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:44,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:44,988 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:44,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:45,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:45,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:45,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:12:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:45,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:12:45,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:12:45,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:45,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:45,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:45,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:12:45,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84021857] [2020-10-28 10:12:45,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:45,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316474912] [2020-10-28 10:12:45,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:45,208 INFO L87 Difference]: Start difference. First operand 898 states and 1322 transitions. Second operand 5 states. [2020-10-28 10:12:45,688 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:48,846 INFO L93 Difference]: Finished difference Result 2636 states and 3916 transitions. [2020-10-28 10:12:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:48,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2020-10-28 10:12:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:48,854 INFO L225 Difference]: With dead ends: 2636 [2020-10-28 10:12:48,854 INFO L226 Difference]: Without dead ends: 901 [2020-10-28 10:12:48,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2020-10-28 10:12:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 897. [2020-10-28 10:12:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-10-28 10:12:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1320 transitions. [2020-10-28 10:12:48,902 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1320 transitions. Word has length 219 [2020-10-28 10:12:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:48,902 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1320 transitions. [2020-10-28 10:12:48,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1320 transitions. [2020-10-28 10:12:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 10:12:48,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:48,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:48,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:12:48,909 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1015510707, now seen corresponding path program 1 times [2020-10-28 10:12:48,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:48,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470328356] [2020-10-28 10:12:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:48,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:49,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:51,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:51,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 10:12:51,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:51,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2631 [2020-10-28 10:12:51,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:51,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:51,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:12:51,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:12:51,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:51,948 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:51,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:51,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:51,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:51,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:51,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:12:51,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:51,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:52,103 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:52,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:12:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:12:52,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:12:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:52,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470328356] [2020-10-28 10:12:52,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:52,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:52,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509312796] [2020-10-28 10:12:52,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:52,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:52,299 INFO L87 Difference]: Start difference. First operand 897 states and 1320 transitions. Second operand 5 states. [2020-10-28 10:12:52,710 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:56,053 INFO L93 Difference]: Finished difference Result 2632 states and 3943 transitions. [2020-10-28 10:12:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:56,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2020-10-28 10:12:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:56,065 INFO L225 Difference]: With dead ends: 2632 [2020-10-28 10:12:56,065 INFO L226 Difference]: Without dead ends: 1741 [2020-10-28 10:12:56,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2020-10-28 10:12:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1734. [2020-10-28 10:12:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2020-10-28 10:12:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2527 transitions. [2020-10-28 10:12:56,133 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2527 transitions. Word has length 219 [2020-10-28 10:12:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:56,134 INFO L481 AbstractCegarLoop]: Abstraction has 1734 states and 2527 transitions. [2020-10-28 10:12:56,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2527 transitions. [2020-10-28 10:12:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-28 10:12:56,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:56,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:56,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:12:56,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1065109856, now seen corresponding path program 1 times [2020-10-28 10:12:56,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:56,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920400059] [2020-10-28 10:12:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:56,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:56,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:58,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:58,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:01,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:01,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-28 10:13:01,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:01,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 10:13:01,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:01,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 10:13:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:13:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:01,644 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:01,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:01,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:01,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:01,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:01,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:01,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:01,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:01,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:01,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:01,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:13:01,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:01,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:13:01,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:01,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:01,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:01,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:01,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:01,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:01,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:13:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:01,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:01,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:01,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 10:13:01,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:01,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 10:13:01,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:01,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 10:13:01,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 10:13:02,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920400059] [2020-10-28 10:13:02,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:02,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:13:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337490484] [2020-10-28 10:13:02,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:13:02,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:13:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:02,112 INFO L87 Difference]: Start difference. First operand 1734 states and 2527 transitions. Second operand 6 states. [2020-10-28 10:13:02,485 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:03,511 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:07,256 INFO L93 Difference]: Finished difference Result 6638 states and 10015 transitions. [2020-10-28 10:13:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:13:07,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 246 [2020-10-28 10:13:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:07,293 INFO L225 Difference]: With dead ends: 6638 [2020-10-28 10:13:07,293 INFO L226 Difference]: Without dead ends: 4910 [2020-10-28 10:13:07,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:13:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-10-28 10:13:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4872. [2020-10-28 10:13:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4872 states. [2020-10-28 10:13:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 7240 transitions. [2020-10-28 10:13:07,538 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 7240 transitions. Word has length 246 [2020-10-28 10:13:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:07,539 INFO L481 AbstractCegarLoop]: Abstraction has 4872 states and 7240 transitions. [2020-10-28 10:13:07,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:13:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 7240 transitions. [2020-10-28 10:13:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 10:13:07,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:07,558 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:07,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:13:07,559 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 254152381, now seen corresponding path program 1 times [2020-10-28 10:13:07,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:07,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937107383] [2020-10-28 10:13:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:07,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:12,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:12,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 10:13:12,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:12,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 10:13:12,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:12,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 10:13:12,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:13:12,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:13,086 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:13,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:13,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:13:13,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:13,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:13,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:13,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:13,240 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:13:13,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:13:13,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:13,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:13:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:13:13,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 10:13:13,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 10:13:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 10:13:13,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937107383] [2020-10-28 10:13:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:13,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:13,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527798855] [2020-10-28 10:13:13,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:13,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:13,658 INFO L87 Difference]: Start difference. First operand 4872 states and 7240 transitions. Second operand 5 states. [2020-10-28 10:13:14,017 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:17,194 INFO L93 Difference]: Finished difference Result 12885 states and 19821 transitions. [2020-10-28 10:13:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:17,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2020-10-28 10:13:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:17,247 INFO L225 Difference]: With dead ends: 12885 [2020-10-28 10:13:17,248 INFO L226 Difference]: Without dead ends: 8019 [2020-10-28 10:13:17,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8019 states. [2020-10-28 10:13:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8019 to 8012. [2020-10-28 10:13:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8012 states. [2020-10-28 10:13:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 11888 transitions. [2020-10-28 10:13:17,658 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 11888 transitions. Word has length 251 [2020-10-28 10:13:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:17,659 INFO L481 AbstractCegarLoop]: Abstraction has 8012 states and 11888 transitions. [2020-10-28 10:13:17,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 11888 transitions. [2020-10-28 10:13:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 10:13:17,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:17,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:17,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:13:17,691 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:17,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2017519705, now seen corresponding path program 1 times [2020-10-28 10:13:17,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:17,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710164956] [2020-10-28 10:13:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:17,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:21,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:21,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 10:13:21,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:13:21,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3323 [2020-10-28 10:13:21,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:21,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 10:13:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:13:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:21,438 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:21,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:21,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:21,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:21,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:21,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:21,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:13:21,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:21,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:21,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:21,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:21,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:21,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:21,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:21,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:21,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:21,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 10:13:21,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:21,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 10:13:21,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:21,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:21,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:21,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:21,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 10:13:21,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:13:21,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710164956] [2020-10-28 10:13:21,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:21,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:21,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083778764] [2020-10-28 10:13:21,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:21,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:21,953 INFO L87 Difference]: Start difference. First operand 8012 states and 11888 transitions. Second operand 5 states. [2020-10-28 10:13:22,200 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:24,957 INFO L93 Difference]: Finished difference Result 19160 states and 29109 transitions. [2020-10-28 10:13:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:24,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 263 [2020-10-28 10:13:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:25,025 INFO L225 Difference]: With dead ends: 19160 [2020-10-28 10:13:25,026 INFO L226 Difference]: Without dead ends: 11154 [2020-10-28 10:13:25,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2020-10-28 10:13:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 11147. [2020-10-28 10:13:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11147 states. [2020-10-28 10:13:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 16852 transitions. [2020-10-28 10:13:25,501 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 16852 transitions. Word has length 263 [2020-10-28 10:13:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:25,501 INFO L481 AbstractCegarLoop]: Abstraction has 11147 states and 16852 transitions. [2020-10-28 10:13:25,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 16852 transitions. [2020-10-28 10:13:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-28 10:13:25,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:25,687 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:25,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:13:25,688 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2089301738, now seen corresponding path program 1 times [2020-10-28 10:13:25,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106382029] [2020-10-28 10:13:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:25,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:27,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:28,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:30,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:30,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 10:13:30,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:30,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 10:13:30,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:30,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:30,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:30,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 10:13:30,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:13:30,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,160 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:31,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:31,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:31,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:13:31,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:31,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:13:31,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:13:31,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:31,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:13:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 10:13:31,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 10:13:31,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106382029] [2020-10-28 10:13:31,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:31,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:31,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971517032] [2020-10-28 10:13:31,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:31,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:31,488 INFO L87 Difference]: Start difference. First operand 11147 states and 16852 transitions. Second operand 5 states. [2020-10-28 10:13:31,762 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:13:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:34,749 INFO L93 Difference]: Finished difference Result 28998 states and 44638 transitions. [2020-10-28 10:13:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:34,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2020-10-28 10:13:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:34,834 INFO L225 Difference]: With dead ends: 28998 [2020-10-28 10:13:34,834 INFO L226 Difference]: Without dead ends: 17857 [2020-10-28 10:13:34,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17857 states. [2020-10-28 10:13:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17857 to 17009. [2020-10-28 10:13:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17009 states. [2020-10-28 10:13:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17009 states to 17009 states and 25560 transitions. [2020-10-28 10:13:35,414 INFO L78 Accepts]: Start accepts. Automaton has 17009 states and 25560 transitions. Word has length 267 [2020-10-28 10:13:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:35,415 INFO L481 AbstractCegarLoop]: Abstraction has 17009 states and 25560 transitions. [2020-10-28 10:13:35,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 17009 states and 25560 transitions. [2020-10-28 10:13:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-28 10:13:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:35,495 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:35,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:13:35,495 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash 801972054, now seen corresponding path program 1 times [2020-10-28 10:13:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:35,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668667399] [2020-10-28 10:13:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:36,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:38,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:38,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-28 10:13:38,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:38,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2513 [2020-10-28 10:13:38,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:38,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:13:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:13:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 10:13:38,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:38,359 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:38,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:38,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:38,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:38,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:38,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:38,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:13:38,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:38,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:38,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:38,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:13:38,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:38,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:38,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:38,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:13:38,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:13:38,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:38,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 10:13:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:38,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:38,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 10:13:38,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-28 10:13:38,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:38,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 10:13:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 10:13:38,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668667399] [2020-10-28 10:13:38,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:38,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:13:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210989177] [2020-10-28 10:13:38,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:38,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:38,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:38,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:38,978 INFO L87 Difference]: Start difference. First operand 17009 states and 25560 transitions. Second operand 7 states. [2020-10-28 10:13:39,241 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:40,025 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:43,166 INFO L93 Difference]: Finished difference Result 34003 states and 52287 transitions. [2020-10-28 10:13:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:13:43,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 288 [2020-10-28 10:13:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:43,243 INFO L225 Difference]: With dead ends: 34003 [2020-10-28 10:13:43,244 INFO L226 Difference]: Without dead ends: 17207 [2020-10-28 10:13:43,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:13:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17207 states. [2020-10-28 10:13:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17207 to 16924. [2020-10-28 10:13:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16924 states. [2020-10-28 10:13:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16924 states to 16924 states and 23694 transitions. [2020-10-28 10:13:43,805 INFO L78 Accepts]: Start accepts. Automaton has 16924 states and 23694 transitions. Word has length 288 [2020-10-28 10:13:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:43,806 INFO L481 AbstractCegarLoop]: Abstraction has 16924 states and 23694 transitions. [2020-10-28 10:13:43,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16924 states and 23694 transitions. [2020-10-28 10:13:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-28 10:13:43,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:43,868 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:43,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:13:43,869 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1268482635, now seen corresponding path program 1 times [2020-10-28 10:13:43,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:43,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265897880] [2020-10-28 10:13:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:44,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:48,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:48,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-28 10:13:48,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 10:13:48,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:48,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:13:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 10:13:48,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:49,281 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:49,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:49,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:49,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:49,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:49,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:13:49,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:49,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:49,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:49,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:49,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:49,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:49,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:13:49,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:49,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:13:49,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:49,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:49,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:49,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:49,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:13:49,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:49,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 10:13:49,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:49,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:13:49,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:49,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:13:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:49,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:49,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:49,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 10:13:49,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:49,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 10:13:49,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:49,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:49,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:49,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 10:13:49,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 10:13:49,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265897880] [2020-10-28 10:13:49,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:49,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:49,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644374903] [2020-10-28 10:13:49,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:49,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:49,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:49,861 INFO L87 Difference]: Start difference. First operand 16924 states and 23694 transitions. Second operand 7 states. [2020-10-28 10:13:50,387 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:51,748 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:54,586 INFO L93 Difference]: Finished difference Result 33726 states and 47436 transitions. [2020-10-28 10:13:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:13:54,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 300 [2020-10-28 10:13:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:54,644 INFO L225 Difference]: With dead ends: 33726 [2020-10-28 10:13:54,645 INFO L226 Difference]: Without dead ends: 17015 [2020-10-28 10:13:54,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:13:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17015 states. [2020-10-28 10:13:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17015 to 16950. [2020-10-28 10:13:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16950 states. [2020-10-28 10:13:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16950 states to 16950 states and 21660 transitions. [2020-10-28 10:13:55,153 INFO L78 Accepts]: Start accepts. Automaton has 16950 states and 21660 transitions. Word has length 300 [2020-10-28 10:13:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:55,153 INFO L481 AbstractCegarLoop]: Abstraction has 16950 states and 21660 transitions. [2020-10-28 10:13:55,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16950 states and 21660 transitions. [2020-10-28 10:13:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-28 10:13:55,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:55,195 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:55,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:13:55,195 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1719319032, now seen corresponding path program 1 times [2020-10-28 10:13:55,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:55,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185244489] [2020-10-28 10:13:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:00,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:00,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-28 10:14:00,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:00,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 10:14:00,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:00,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 10:14:00,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:00,574 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:00,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:00,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:00,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:00,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:00,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 10:14:00,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:00,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:00,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:00,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:00,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:00,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:00,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:00,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:00,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:14:00,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:00,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:00,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:00,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:00,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:00,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:00,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:14:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:01,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-28 10:14:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:01,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:01,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:01,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:14:01,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:14:01,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:01,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:14:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:01,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 112 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 10:14:01,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185244489] [2020-10-28 10:14:01,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:01,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318769594] [2020-10-28 10:14:01,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:01,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:01,227 INFO L87 Difference]: Start difference. First operand 16950 states and 21660 transitions. Second operand 7 states. [2020-10-28 10:14:01,665 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:03,687 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:14:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:05,864 INFO L93 Difference]: Finished difference Result 37510 states and 51570 transitions. [2020-10-28 10:14:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:05,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 308 [2020-10-28 10:14:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:05,964 INFO L225 Difference]: With dead ends: 37510 [2020-10-28 10:14:05,965 INFO L226 Difference]: Without dead ends: 20990 [2020-10-28 10:14:06,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20990 states. [2020-10-28 10:14:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20990 to 19918. [2020-10-28 10:14:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19918 states. [2020-10-28 10:14:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19918 states to 19918 states and 25054 transitions. [2020-10-28 10:14:06,705 INFO L78 Accepts]: Start accepts. Automaton has 19918 states and 25054 transitions. Word has length 308 [2020-10-28 10:14:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:06,706 INFO L481 AbstractCegarLoop]: Abstraction has 19918 states and 25054 transitions. [2020-10-28 10:14:06,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19918 states and 25054 transitions. [2020-10-28 10:14:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 10:14:06,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:06,743 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:06,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:14:06,743 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash -248785559, now seen corresponding path program 1 times [2020-10-28 10:14:06,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:06,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595733505] [2020-10-28 10:14:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:09,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:09,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:11,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:11,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-28 10:14:11,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:14:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 10:14:11,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:11,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:14:11,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,134 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:12,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:12,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:12,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:12,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:12,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:12,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:14:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:14:12,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:14:12,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-28 10:14:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:14:12,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:14:12,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:12,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:14:12,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:12,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 129 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 10:14:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595733505] [2020-10-28 10:14:13,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:13,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:13,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110726311] [2020-10-28 10:14:13,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:13,242 INFO L87 Difference]: Start difference. First operand 19918 states and 25054 transitions. Second operand 7 states. [2020-10-28 10:14:13,543 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:15,787 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 10:14:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:18,703 INFO L93 Difference]: Finished difference Result 47237 states and 60956 transitions. [2020-10-28 10:14:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:18,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 327 [2020-10-28 10:14:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:18,806 INFO L225 Difference]: With dead ends: 47237 [2020-10-28 10:14:18,806 INFO L226 Difference]: Without dead ends: 27954 [2020-10-28 10:14:18,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27954 states. [2020-10-28 10:14:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27954 to 27730. [2020-10-28 10:14:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27730 states. [2020-10-28 10:14:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 34370 transitions. [2020-10-28 10:14:19,642 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 34370 transitions. Word has length 327 [2020-10-28 10:14:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:19,643 INFO L481 AbstractCegarLoop]: Abstraction has 27730 states and 34370 transitions. [2020-10-28 10:14:19,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 34370 transitions. [2020-10-28 10:14:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 10:14:19,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:19,693 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:19,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:14:19,693 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1424555194, now seen corresponding path program 1 times [2020-10-28 10:14:19,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:19,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315947708] [2020-10-28 10:14:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:19,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:24,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:24,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-28 10:14:24,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 10:14:24,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:24,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-28 10:14:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:14:24,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,123 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:25,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:25,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:25,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:25,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:14:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:14:25,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:14:25,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 10:14:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:14:25,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 10:14:25,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:14:25,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 125 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 10:14:25,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315947708] [2020-10-28 10:14:25,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:25,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:14:25,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033761792] [2020-10-28 10:14:25,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:14:25,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:14:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:14:25,601 INFO L87 Difference]: Start difference. First operand 27730 states and 34370 transitions. Second operand 5 states. [2020-10-28 10:14:25,936 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:14:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:29,040 INFO L93 Difference]: Finished difference Result 60905 states and 75753 transitions. [2020-10-28 10:14:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:29,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 10:14:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:29,146 INFO L225 Difference]: With dead ends: 60905 [2020-10-28 10:14:29,147 INFO L226 Difference]: Without dead ends: 33179 [2020-10-28 10:14:29,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33179 states. [2020-10-28 10:14:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33179 to 33122. [2020-10-28 10:14:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33122 states. [2020-10-28 10:14:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33122 states to 33122 states and 40777 transitions. [2020-10-28 10:14:30,029 INFO L78 Accepts]: Start accepts. Automaton has 33122 states and 40777 transitions. Word has length 331 [2020-10-28 10:14:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:30,029 INFO L481 AbstractCegarLoop]: Abstraction has 33122 states and 40777 transitions. [2020-10-28 10:14:30,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:14:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 33122 states and 40777 transitions. [2020-10-28 10:14:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-28 10:14:30,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:30,095 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:14:30,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:14:30,095 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1218187959, now seen corresponding path program 1 times [2020-10-28 10:14:30,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:30,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671971674] [2020-10-28 10:14:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-28 10:14:35,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:14:35,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 10:14:35,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 10:14:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 10:14:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,512 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:35,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:35,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:14:35,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:14:35,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:35,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:14:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:14:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 10:14:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 10:14:35,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 10:14:35,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:35,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:35,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 10:14:35,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 10:14:36,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671971674] [2020-10-28 10:14:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:36,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:36,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860793704] [2020-10-28 10:14:36,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:36,378 INFO L87 Difference]: Start difference. First operand 33122 states and 40777 transitions. Second operand 7 states. [2020-10-28 10:14:36,672 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:14:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:40,677 INFO L93 Difference]: Finished difference Result 68781 states and 86963 transitions. [2020-10-28 10:14:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:14:40,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 358 [2020-10-28 10:14:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:40,809 INFO L225 Difference]: With dead ends: 68781 [2020-10-28 10:14:40,809 INFO L226 Difference]: Without dead ends: 36087 [2020-10-28 10:14:40,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:40,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36087 states. [2020-10-28 10:14:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36087 to 35005. [2020-10-28 10:14:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35005 states. [2020-10-28 10:14:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35005 states to 35005 states and 43001 transitions. [2020-10-28 10:14:41,919 INFO L78 Accepts]: Start accepts. Automaton has 35005 states and 43001 transitions. Word has length 358 [2020-10-28 10:14:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:41,920 INFO L481 AbstractCegarLoop]: Abstraction has 35005 states and 43001 transitions. [2020-10-28 10:14:41,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 35005 states and 43001 transitions. [2020-10-28 10:14:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-28 10:14:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:41,965 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:41,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:14:41,965 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:41,966 INFO L82 PathProgramCache]: Analyzing trace with hash 647058707, now seen corresponding path program 1 times [2020-10-28 10:14:41,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:41,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113928112] [2020-10-28 10:14:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:44,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-10-28 10:14:47,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:14:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,423 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:47,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:47,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:14:47,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:47,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:14:47,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:14:47,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:47,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:47,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:14:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:47,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 10:14:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 10:14:47,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 10:14:47,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:14:47,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-28 10:14:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 10:14:47,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 10:14:48,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113928112] [2020-10-28 10:14:48,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:48,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:48,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201381806] [2020-10-28 10:14:48,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:48,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:48,018 INFO L87 Difference]: Start difference. First operand 35005 states and 43001 transitions. Second operand 7 states. [2020-10-28 10:14:48,417 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:48,837 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:54,196 INFO L93 Difference]: Finished difference Result 78329 states and 100291 transitions. [2020-10-28 10:14:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:14:54,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 363 [2020-10-28 10:14:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:54,331 INFO L225 Difference]: With dead ends: 78329 [2020-10-28 10:14:54,331 INFO L226 Difference]: Without dead ends: 43752 [2020-10-28 10:14:54,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43752 states. [2020-10-28 10:14:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43752 to 42870. [2020-10-28 10:14:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42870 states. [2020-10-28 10:14:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42870 states to 42870 states and 51479 transitions. [2020-10-28 10:14:55,572 INFO L78 Accepts]: Start accepts. Automaton has 42870 states and 51479 transitions. Word has length 363 [2020-10-28 10:14:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:55,573 INFO L481 AbstractCegarLoop]: Abstraction has 42870 states and 51479 transitions. [2020-10-28 10:14:55,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 42870 states and 51479 transitions. [2020-10-28 10:14:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-28 10:14:55,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:55,635 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:14:55,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:14:55,635 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash -724334883, now seen corresponding path program 1 times [2020-10-28 10:14:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362646185] [2020-10-28 10:14:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:55,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:56,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:57,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:00,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 380 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 10:15:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 312 [2020-10-28 10:15:00,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:01,095 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:01,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:01,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:01,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:01,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:01,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:15:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:01,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:01,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:01,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:01,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:15:01,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:01,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:15:01,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:01,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:01,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:15:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:01,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:01,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:01,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:15:01,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:15:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:01,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 10:15:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:01,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:01,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:01,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 10:15:01,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 94 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 10:15:01,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362646185] [2020-10-28 10:15:01,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:01,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:15:01,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597145006] [2020-10-28 10:15:01,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:15:01,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:15:01,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:15:01,727 INFO L87 Difference]: Start difference. First operand 42870 states and 51479 transitions. Second operand 6 states. [2020-10-28 10:15:01,988 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:05,546 INFO L93 Difference]: Finished difference Result 79645 states and 98262 transitions. [2020-10-28 10:15:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:15:05,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 364 [2020-10-28 10:15:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:05,728 INFO L225 Difference]: With dead ends: 79645 [2020-10-28 10:15:05,728 INFO L226 Difference]: Without dead ends: 47108 [2020-10-28 10:15:05,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:15:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47108 states. [2020-10-28 10:15:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47108 to 46656. [2020-10-28 10:15:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46656 states. [2020-10-28 10:15:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46656 states to 46656 states and 56174 transitions. [2020-10-28 10:15:07,573 INFO L78 Accepts]: Start accepts. Automaton has 46656 states and 56174 transitions. Word has length 364 [2020-10-28 10:15:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:07,574 INFO L481 AbstractCegarLoop]: Abstraction has 46656 states and 56174 transitions. [2020-10-28 10:15:07,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:15:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 46656 states and 56174 transitions. [2020-10-28 10:15:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-10-28 10:15:07,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:07,668 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:07,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 10:15:07,669 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1379549041, now seen corresponding path program 1 times [2020-10-28 10:15:07,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:07,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836517479] [2020-10-28 10:15:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:07,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:08,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:09,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:12,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:12,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 420 [2020-10-28 10:15:12,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:15:12,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 10:15:12,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:12,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 10:15:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 10:15:12,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,082 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:13,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:13,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:15:13,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:13,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:13,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:13,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:13,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:15:13,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:15:13,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:13,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:13,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:13,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:15:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:15:13,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:15:13,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 10:15:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:15:13,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:15:13,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:15:13,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-28 10:15:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:15:13,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-28 10:15:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:15:13,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-28 10:15:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 10:15:13,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 10:15:13,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 10:15:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:13,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 272 proven. 20 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-10-28 10:15:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836517479] [2020-10-28 10:15:13,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:13,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:13,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002578325] [2020-10-28 10:15:13,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:13,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:13,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:13,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:13,733 INFO L87 Difference]: Start difference. First operand 46656 states and 56174 transitions. Second operand 7 states. [2020-10-28 10:15:13,997 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:16,178 INFO L93 Difference]: Finished difference Result 84137 states and 101144 transitions. [2020-10-28 10:15:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:15:16,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 398 [2020-10-28 10:15:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:16,251 INFO L225 Difference]: With dead ends: 84137 [2020-10-28 10:15:16,251 INFO L226 Difference]: Without dead ends: 38339 [2020-10-28 10:15:16,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:15:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38339 states. [2020-10-28 10:15:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38339 to 38275. [2020-10-28 10:15:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38275 states. [2020-10-28 10:15:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38275 states to 38275 states and 44893 transitions. [2020-10-28 10:15:17,439 INFO L78 Accepts]: Start accepts. Automaton has 38275 states and 44893 transitions. Word has length 398 [2020-10-28 10:15:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:17,439 INFO L481 AbstractCegarLoop]: Abstraction has 38275 states and 44893 transitions. [2020-10-28 10:15:17,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 38275 states and 44893 transitions. [2020-10-28 10:15:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-28 10:15:17,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:17,519 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:17,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 10:15:17,519 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1563486213, now seen corresponding path program 1 times [2020-10-28 10:15:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:17,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469437470] [2020-10-28 10:15:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:17,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:18,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:18,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:22,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:22,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 449 [2020-10-28 10:15:22,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:15:22,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 10:15:22,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:22,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 10:15:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:15:22,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:22,911 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:22,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:22,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:22,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:22,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:22,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:15:22,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:22,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:22,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:23,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:23,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:23,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 10:15:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:23,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:23,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-28 10:15:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:23,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:23,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:23,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:23,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-28 10:15:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:23,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:23,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:23,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:15:23,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 10:15:23,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:23,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:15:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:23,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-10-28 10:15:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:23,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 10:15:23,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 342 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 10:15:23,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469437470] [2020-10-28 10:15:23,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:23,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:23,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903630894] [2020-10-28 10:15:23,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:23,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:23,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:23,828 INFO L87 Difference]: Start difference. First operand 38275 states and 44893 transitions. Second operand 7 states. [2020-10-28 10:15:24,132 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:25,655 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:28,179 INFO L93 Difference]: Finished difference Result 77237 states and 90568 transitions. [2020-10-28 10:15:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:28,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 429 [2020-10-28 10:15:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:28,257 INFO L225 Difference]: With dead ends: 77237 [2020-10-28 10:15:28,257 INFO L226 Difference]: Without dead ends: 39824 [2020-10-28 10:15:28,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:15:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39824 states. [2020-10-28 10:15:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39824 to 38928. [2020-10-28 10:15:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38928 states. [2020-10-28 10:15:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38928 states to 38928 states and 44899 transitions. [2020-10-28 10:15:29,549 INFO L78 Accepts]: Start accepts. Automaton has 38928 states and 44899 transitions. Word has length 429 [2020-10-28 10:15:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:29,550 INFO L481 AbstractCegarLoop]: Abstraction has 38928 states and 44899 transitions. [2020-10-28 10:15:29,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 38928 states and 44899 transitions. [2020-10-28 10:15:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-28 10:15:29,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:29,615 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:29,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 10:15:29,616 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash -34652103, now seen corresponding path program 1 times [2020-10-28 10:15:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:29,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061253949] [2020-10-28 10:15:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:29,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:30,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking...