/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=SHALLOWEST --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/Problem15_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:33:51,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:33:51,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:33:51,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:33:51,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:33:51,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:33:51,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:33:51,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:33:51,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:33:51,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:33:51,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:33:51,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:33:51,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:33:51,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:33:51,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:33:51,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:33:51,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:33:51,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:33:51,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:33:51,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:33:51,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:33:51,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:33:51,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:33:51,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:33:51,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:33:51,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:33:51,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:33:51,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:33:51,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:33:51,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:33:51,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:33:51,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:33:51,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:33:51,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:33:52,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:33:52,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:33:52,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:33:52,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:33:52,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:33:52,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:33:52,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:33:52,006 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 [2020-10-26 23:33:52,062 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:33:52,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:33:52,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:33:52,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:33:52,068 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:33:52,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:33:52,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:33:52,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:33:52,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:33:52,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:33:52,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:33:52,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:33:52,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:33:52,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:33:52,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:33:52,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:33:52,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:33:52,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:33:52,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:33:52,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:33:52,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:33:52,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:33:52,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:33:52,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:33:52,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:33:52,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:33:52,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:33:52,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:33:52,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:33:52,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:33:52,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:33:52,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:33:52,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:33:52,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:33:52,524 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:33:52,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label00.c [2020-10-26 23:33:52,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b8615034/78386521c8784eca9142322bd4124db2/FLAGcbfed8211 [2020-10-26 23:33:53,452 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:33:53,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label00.c [2020-10-26 23:33:53,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b8615034/78386521c8784eca9142322bd4124db2/FLAGcbfed8211 [2020-10-26 23:33:53,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b8615034/78386521c8784eca9142322bd4124db2 [2020-10-26 23:33:53,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:33:53,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:33:53,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:33:53,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:33:53,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:33:53,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:33:53" (1/1) ... [2020-10-26 23:33:53,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dee31a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:53, skipping insertion in model container [2020-10-26 23:33:53,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:33:53" (1/1) ... [2020-10-26 23:33:53,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:33:53,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:33:54,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:33:54,646 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:33:55,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:33:55,123 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:33:55,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55 WrapperNode [2020-10-26 23:33:55,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:33:55,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:33:55,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:33:55,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:33:55,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (1/1) ... [2020-10-26 23:33:55,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:33:55,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:33:55,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:33:55,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:33:55,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (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 [2020-10-26 23:33:55,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:33:55,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:33:55,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:33:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:33:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:33:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:33:55,441 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:33:55,441 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:33:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:33:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:33:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:33:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:33:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:33:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:33:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:33:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:33:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:33:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:33:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:33:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:33:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:33:59,389 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:33:59,389 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:33:59,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:33:59 BoogieIcfgContainer [2020-10-26 23:33:59,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:33:59,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:33:59,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:33:59,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:33:59,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:33:53" (1/3) ... [2020-10-26 23:33:59,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e83a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:33:59, skipping insertion in model container [2020-10-26 23:33:59,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:33:55" (2/3) ... [2020-10-26 23:33:59,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e83a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:33:59, skipping insertion in model container [2020-10-26 23:33:59,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:33:59" (3/3) ... [2020-10-26 23:33:59,403 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label00.c [2020-10-26 23:33:59,419 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:33:59,427 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:33:59,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:33:59,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:33:59,481 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:33:59,481 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:33:59,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:33:59,482 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:33:59,482 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:33:59,482 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:33:59,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:33:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:33:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 23:33:59,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:33:59,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:33:59,522 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:33:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:33:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1734594721, now seen corresponding path program 1 times [2020-10-26 23:33:59,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:33:59,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842242298] [2020-10-26 23:33:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:33:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:33:59,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:00,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 23:34:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-26 23:34:00,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:34:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:34:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 23:34:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:34:00,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:34:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:00,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:00,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:00,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:34:00,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 23:34:00,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:34:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:34:00,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:34:00,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842242298] [2020-10-26 23:34:00,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:34:00,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:34:00,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213570757] [2020-10-26 23:34:00,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:34:00,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:34:00,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:34:00,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:34:00,458 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:34:06,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:34:06,727 INFO L93 Difference]: Finished difference Result 1204 states and 2170 transitions. [2020-10-26 23:34:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:34:06,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-26 23:34:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:34:06,755 INFO L225 Difference]: With dead ends: 1204 [2020-10-26 23:34:06,755 INFO L226 Difference]: Without dead ends: 698 [2020-10-26 23:34:06,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:34:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-26 23:34:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 692. [2020-10-26 23:34:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-10-26 23:34:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1013 transitions. [2020-10-26 23:34:06,890 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1013 transitions. Word has length 13 [2020-10-26 23:34:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:34:06,891 INFO L481 AbstractCegarLoop]: Abstraction has 692 states and 1013 transitions. [2020-10-26 23:34:06,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:34:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1013 transitions. [2020-10-26 23:34:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 23:34:06,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:34:06,896 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:34:06,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:34:06,896 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:34:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:34:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash -216852343, now seen corresponding path program 1 times [2020-10-26 23:34:06,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:34:06,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147866816] [2020-10-26 23:34:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:34:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:07,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:07,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:34:07,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:07,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-26 23:34:07,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:07,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:34:07,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:34:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:34:07,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:07,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:34:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:07,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:07,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:07,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:34:07,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:07,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:34:07,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:07,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:34:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:34:07,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:34:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:07,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:07,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:34:07,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:07,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 23:34:07,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:07,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:34:07,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:34:07,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:34:07,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:34:07,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147866816] [2020-10-26 23:34:07,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:34:07,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:34:07,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604911003] [2020-10-26 23:34:07,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:34:08,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:34:08,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:34:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:34:08,001 INFO L87 Difference]: Start difference. First operand 692 states and 1013 transitions. Second operand 7 states. [2020-10-26 23:34:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:34:17,673 INFO L93 Difference]: Finished difference Result 1712 states and 2419 transitions. [2020-10-26 23:34:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:34:17,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-26 23:34:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:34:17,690 INFO L225 Difference]: With dead ends: 1712 [2020-10-26 23:34:17,691 INFO L226 Difference]: Without dead ends: 1026 [2020-10-26 23:34:17,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:34:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-10-26 23:34:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1015. [2020-10-26 23:34:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-26 23:34:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1368 transitions. [2020-10-26 23:34:17,754 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1368 transitions. Word has length 82 [2020-10-26 23:34:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:34:17,755 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1368 transitions. [2020-10-26 23:34:17,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:34:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1368 transitions. [2020-10-26 23:34:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 23:34:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:34:17,758 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:34:17,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:34:17,759 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:34:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:34:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1997538543, now seen corresponding path program 1 times [2020-10-26 23:34:17,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:34:17,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072314179] [2020-10-26 23:34:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:34:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:17,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:17,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:18,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:18,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 23:34:18,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:34:18,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-26 23:34:18,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:18,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:34:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:34:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:34:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:34:18,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:34:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:18,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:18,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:18,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:34:18,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:34:18,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:34:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:34:18,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:18,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:34:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:18,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:19,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:19,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:34:19,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:19,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 23:34:19,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:34:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:34:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:34:19,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:34:19,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072314179] [2020-10-26 23:34:19,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:34:19,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:34:19,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903967647] [2020-10-26 23:34:19,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:34:19,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:34:19,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:34:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:34:19,123 INFO L87 Difference]: Start difference. First operand 1015 states and 1368 transitions. Second operand 8 states. [2020-10-26 23:34:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:34:31,491 INFO L93 Difference]: Finished difference Result 3002 states and 4333 transitions. [2020-10-26 23:34:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:34:31,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-10-26 23:34:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:34:31,507 INFO L225 Difference]: With dead ends: 3002 [2020-10-26 23:34:31,507 INFO L226 Difference]: Without dead ends: 2300 [2020-10-26 23:34:31,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:34:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2020-10-26 23:34:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1971. [2020-10-26 23:34:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1971 states. [2020-10-26 23:34:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2636 transitions. [2020-10-26 23:34:31,583 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2636 transitions. Word has length 87 [2020-10-26 23:34:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:34:31,584 INFO L481 AbstractCegarLoop]: Abstraction has 1971 states and 2636 transitions. [2020-10-26 23:34:31,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:34:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2636 transitions. [2020-10-26 23:34:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 23:34:31,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:34:31,586 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:34:31,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:34:31,587 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:34:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:34:31,587 INFO L82 PathProgramCache]: Analyzing trace with hash -719797461, now seen corresponding path program 1 times [2020-10-26 23:34:31,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:34:31,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628696895] [2020-10-26 23:34:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:34:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:31,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:31,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:31,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 23:34:31,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 23:34:31,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:31,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:34:31,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:34:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 23:34:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:31,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:34:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:31,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:31,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:34:31,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:34:31,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:34:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:34:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:31,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:34:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:32,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:32,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:34:32,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:32,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 23:34:32,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:32,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:34:32,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:32,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:34:32,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:34:32,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628696895] [2020-10-26 23:34:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:34:32,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:34:32,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767963214] [2020-10-26 23:34:32,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:34:32,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:34:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:34:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:34:32,201 INFO L87 Difference]: Start difference. First operand 1971 states and 2636 transitions. Second operand 5 states. [2020-10-26 23:34:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:34:45,791 INFO L93 Difference]: Finished difference Result 5209 states and 7204 transitions. [2020-10-26 23:34:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:34:45,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-26 23:34:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:34:45,814 INFO L225 Difference]: With dead ends: 5209 [2020-10-26 23:34:45,814 INFO L226 Difference]: Without dead ends: 3244 [2020-10-26 23:34:45,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:34:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2020-10-26 23:34:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 3227. [2020-10-26 23:34:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-10-26 23:34:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4239 transitions. [2020-10-26 23:34:45,944 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4239 transitions. Word has length 108 [2020-10-26 23:34:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:34:45,945 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 4239 transitions. [2020-10-26 23:34:45,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:34:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4239 transitions. [2020-10-26 23:34:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-26 23:34:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:34:45,958 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:34:45,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:34:45,958 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:34:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:34:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash -454252841, now seen corresponding path program 1 times [2020-10-26 23:34:45,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:34:45,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043229735] [2020-10-26 23:34:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:34:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:46,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:47,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-26 23:34:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:34:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-26 23:34:47,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:34:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:34:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-26 23:34:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:47,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:34:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:47,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:47,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:34:47,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:47,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:34:47,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:34:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:34:47,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:47,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:34:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:47,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:48,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:48,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 23:34:48,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-26 23:34:48,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:34:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:34:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 23:34:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:34:48,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043229735] [2020-10-26 23:34:48,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:34:48,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:34:48,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229314227] [2020-10-26 23:34:48,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:34:48,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:34:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:34:48,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:34:48,712 INFO L87 Difference]: Start difference. First operand 3227 states and 4239 transitions. Second operand 7 states. [2020-10-26 23:34:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:34:57,191 INFO L93 Difference]: Finished difference Result 6852 states and 9196 transitions. [2020-10-26 23:34:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:34:57,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2020-10-26 23:34:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:34:57,215 INFO L225 Difference]: With dead ends: 6852 [2020-10-26 23:34:57,215 INFO L226 Difference]: Without dead ends: 3631 [2020-10-26 23:34:57,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:34:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2020-10-26 23:34:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3571. [2020-10-26 23:34:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3571 states. [2020-10-26 23:34:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4638 transitions. [2020-10-26 23:34:57,353 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4638 transitions. Word has length 175 [2020-10-26 23:34:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:34:57,354 INFO L481 AbstractCegarLoop]: Abstraction has 3571 states and 4638 transitions. [2020-10-26 23:34:57,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:34:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4638 transitions. [2020-10-26 23:34:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 23:34:57,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:34:57,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:34:57,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:34:57,360 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:34:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:34:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash 689223283, now seen corresponding path program 1 times [2020-10-26 23:34:57,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:34:57,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593178478] [2020-10-26 23:34:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:34:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:57,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:59,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:59,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 23:34:59,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:34:59,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-10-26 23:34:59,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:59,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:34:59,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:34:59,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-26 23:34:59,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:59,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:34:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:59,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:59,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:59,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:34:59,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:34:59,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:59,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:34:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:34:59,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:34:59,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:34:59,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:34:59,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:34:59,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 23:34:59,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:34:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:34:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:34:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:34:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:34:59,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:34:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:00,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:00,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:35:00,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:00,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 23:35:00,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:00,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:35:00,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:35:00,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:35:00,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-26 23:35:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593178478] [2020-10-26 23:35:00,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:35:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:35:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109927] [2020-10-26 23:35:00,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:35:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:35:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:35:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:35:00,199 INFO L87 Difference]: Start difference. First operand 3571 states and 4638 transitions. Second operand 7 states. [2020-10-26 23:35:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:35:11,499 INFO L93 Difference]: Finished difference Result 8843 states and 11987 transitions. [2020-10-26 23:35:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:35:11,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 178 [2020-10-26 23:35:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:35:11,526 INFO L225 Difference]: With dead ends: 8843 [2020-10-26 23:35:11,526 INFO L226 Difference]: Without dead ends: 5585 [2020-10-26 23:35:11,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:35:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5585 states. [2020-10-26 23:35:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5585 to 5168. [2020-10-26 23:35:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5168 states. [2020-10-26 23:35:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 6259 transitions. [2020-10-26 23:35:11,697 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 6259 transitions. Word has length 178 [2020-10-26 23:35:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:35:11,697 INFO L481 AbstractCegarLoop]: Abstraction has 5168 states and 6259 transitions. [2020-10-26 23:35:11,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:35:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 6259 transitions. [2020-10-26 23:35:11,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 23:35:11,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:35:11,701 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:35:11,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:35:11,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:35:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:35:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash -788323781, now seen corresponding path program 1 times [2020-10-26 23:35:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:35:11,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819900487] [2020-10-26 23:35:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:35:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:12,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:12,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 23:35:12,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:12,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-26 23:35:12,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:12,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:35:12,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-26 23:35:12,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 23:35:12,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:12,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:35:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:12,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:12,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:35:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:35:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:35:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:35:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:35:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:35:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:12,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:12,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-26 23:35:12,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:12,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-26 23:35:12,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:12,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:35:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:35:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:35:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:35:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:35:12,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819900487] [2020-10-26 23:35:12,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:35:12,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:35:12,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888894547] [2020-10-26 23:35:12,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:35:12,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:35:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:35:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:35:12,707 INFO L87 Difference]: Start difference. First operand 5168 states and 6259 transitions. Second operand 5 states. [2020-10-26 23:35:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:35:25,132 INFO L93 Difference]: Finished difference Result 12244 states and 15342 transitions. [2020-10-26 23:35:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:35:25,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-10-26 23:35:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:35:25,174 INFO L225 Difference]: With dead ends: 12244 [2020-10-26 23:35:25,174 INFO L226 Difference]: Without dead ends: 7389 [2020-10-26 23:35:25,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:35:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2020-10-26 23:35:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 6750. [2020-10-26 23:35:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6750 states. [2020-10-26 23:35:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6750 states to 6750 states and 8278 transitions. [2020-10-26 23:35:25,479 INFO L78 Accepts]: Start accepts. Automaton has 6750 states and 8278 transitions. Word has length 193 [2020-10-26 23:35:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:35:25,480 INFO L481 AbstractCegarLoop]: Abstraction has 6750 states and 8278 transitions. [2020-10-26 23:35:25,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:35:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6750 states and 8278 transitions. [2020-10-26 23:35:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 23:35:25,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:35:25,484 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:35:25,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:35:25,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:35:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:35:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1929918312, now seen corresponding path program 1 times [2020-10-26 23:35:25,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:35:25,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177974351] [2020-10-26 23:35:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:35:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:25,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:26,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:26,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 23:35:26,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:26,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-26 23:35:26,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:35:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-26 23:35:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 23:35:26,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:26,259 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:35:26,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:35:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:26,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:26,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:26,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:35:26,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:35:26,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:35:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:35:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:35:26,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:35:26,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:35:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:26,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:26,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:35:26,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:26,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-26 23:35:26,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:35:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:35:26,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-26 23:35:26,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:35:26,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177974351] [2020-10-26 23:35:26,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:35:26,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:35:26,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628014302] [2020-10-26 23:35:26,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:35:26,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:35:26,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:35:26,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:35:26,879 INFO L87 Difference]: Start difference. First operand 6750 states and 8278 transitions. Second operand 5 states. [2020-10-26 23:35:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:35:37,858 INFO L93 Difference]: Finished difference Result 15723 states and 19795 transitions. [2020-10-26 23:35:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:35:37,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2020-10-26 23:35:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:35:37,916 INFO L225 Difference]: With dead ends: 15723 [2020-10-26 23:35:37,916 INFO L226 Difference]: Without dead ends: 9286 [2020-10-26 23:35:37,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:35:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2020-10-26 23:35:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 8964. [2020-10-26 23:35:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8964 states. [2020-10-26 23:35:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 11012 transitions. [2020-10-26 23:35:38,206 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 11012 transitions. Word has length 250 [2020-10-26 23:35:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:35:38,207 INFO L481 AbstractCegarLoop]: Abstraction has 8964 states and 11012 transitions. [2020-10-26 23:35:38,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:35:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 11012 transitions. [2020-10-26 23:35:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-26 23:35:38,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:35:38,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:35:38,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:35:38,214 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:35:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:35:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -113789162, now seen corresponding path program 1 times [2020-10-26 23:35:38,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:35:38,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898536174] [2020-10-26 23:35:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:35:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:38,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:38,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:39,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:42,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:42,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-26 23:35:42,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:35:42,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4397 [2020-10-26 23:35:42,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:42,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:35:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:35:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 313 [2020-10-26 23:35:42,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:35:42,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:35:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:42,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:42,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:35:42,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:42,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:35:42,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:42,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:35:42,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:35:42,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:35:42,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:42,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:35:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:43,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:43,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:35:43,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:35:43,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 23:35:43,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:35:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:35:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:35:43,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:43,357 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-26 23:35:43,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:35:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:35:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:43,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:35:44,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:35:44,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:35:44,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:35:44,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-26 23:35:44,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:35:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:35:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:35:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:35:44,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:35:44,883 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-26 23:35:45,126 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-26 23:35:45,334 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-26 23:35:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:35:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898536174] [2020-10-26 23:35:46,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:35:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:35:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314169255] [2020-10-26 23:35:46,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:35:46,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:35:46,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:35:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:35:46,852 INFO L87 Difference]: Start difference. First operand 8964 states and 11012 transitions. Second operand 12 states. [2020-10-26 23:35:47,572 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-10-26 23:35:47,943 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-26 23:35:48,523 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-26 23:35:49,462 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:35:50,546 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-10-26 23:35:50,820 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-26 23:35:51,484 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-10-26 23:35:51,969 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-10-26 23:35:52,182 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-26 23:35:52,556 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-10-26 23:35:53,095 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 23:35:53,541 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-26 23:35:54,808 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 23:35:55,357 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-26 23:36:05,617 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 23:36:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:36:08,951 INFO L93 Difference]: Finished difference Result 23106 states and 29211 transitions. [2020-10-26 23:36:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 23:36:08,953 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 308 [2020-10-26 23:36:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:36:09,012 INFO L225 Difference]: With dead ends: 23106 [2020-10-26 23:36:09,013 INFO L226 Difference]: Without dead ends: 14455 [2020-10-26 23:36:09,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 23:36:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14455 states. [2020-10-26 23:36:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14455 to 11833. [2020-10-26 23:36:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11833 states. [2020-10-26 23:36:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11833 states to 11833 states and 15092 transitions. [2020-10-26 23:36:09,530 INFO L78 Accepts]: Start accepts. Automaton has 11833 states and 15092 transitions. Word has length 308 [2020-10-26 23:36:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:36:09,531 INFO L481 AbstractCegarLoop]: Abstraction has 11833 states and 15092 transitions. [2020-10-26 23:36:09,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:36:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11833 states and 15092 transitions. [2020-10-26 23:36:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-26 23:36:09,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:36:09,540 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:36:09,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:36:09,540 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:36:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:36:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1296963151, now seen corresponding path program 1 times [2020-10-26 23:36:09,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:36:09,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005489370] [2020-10-26 23:36:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:36:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:12,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:12,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-26 23:36:12,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:36:12,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2475 [2020-10-26 23:36:12,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:36:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:36:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:36:12,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:12,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:36:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:12,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:12,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:12,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:36:12,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:12,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:36:12,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:36:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:36:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:36:12,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:12,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:36:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:12,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:12,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:36:12,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:12,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-26 23:36:12,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:36:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:36:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:36:12,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:12,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:36:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:12,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:13,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:13,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:36:13,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:13,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 23:36:13,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:36:13,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:36:13,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:36:13,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:36:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:36:13,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005489370] [2020-10-26 23:36:13,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:36:13,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:36:13,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578983593] [2020-10-26 23:36:13,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:36:13,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:36:13,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:36:13,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:36:13,203 INFO L87 Difference]: Start difference. First operand 11833 states and 15092 transitions. Second operand 7 states. [2020-10-26 23:36:13,363 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:36:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:36:26,340 INFO L93 Difference]: Finished difference Result 26254 states and 34168 transitions. [2020-10-26 23:36:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:36:26,342 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 367 [2020-10-26 23:36:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:36:26,404 INFO L225 Difference]: With dead ends: 26254 [2020-10-26 23:36:26,405 INFO L226 Difference]: Without dead ends: 15043 [2020-10-26 23:36:26,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:36:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2020-10-26 23:36:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 15004. [2020-10-26 23:36:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-10-26 23:36:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 19063 transitions. [2020-10-26 23:36:26,825 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 19063 transitions. Word has length 367 [2020-10-26 23:36:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:36:26,826 INFO L481 AbstractCegarLoop]: Abstraction has 15004 states and 19063 transitions. [2020-10-26 23:36:26,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:36:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 19063 transitions. [2020-10-26 23:36:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-26 23:36:26,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:36:26,834 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:36:26,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:36:26,834 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:36:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:36:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash -916536675, now seen corresponding path program 1 times [2020-10-26 23:36:26,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:36:26,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022796960] [2020-10-26 23:36:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:36:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:28,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:28,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-26 23:36:28,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-26 23:36:28,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:36:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:36:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 23:36:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:28,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:36:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:28,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:28,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:36:28,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:36:28,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:36:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:36:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:36:28,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:28,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:36:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:28,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:29,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:29,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:36:29,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:29,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-26 23:36:29,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:36:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:36:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:36:29,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:29,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:36:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:29,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:29,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:36:29,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:36:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:36:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:36:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022796960] [2020-10-26 23:36:29,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:36:29,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:36:29,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912946617] [2020-10-26 23:36:29,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:36:29,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:36:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:36:29,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:36:29,629 INFO L87 Difference]: Start difference. First operand 15004 states and 19063 transitions. Second operand 8 states. [2020-10-26 23:36:29,797 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:37:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:03,662 INFO L93 Difference]: Finished difference Result 42592 states and 56111 transitions. [2020-10-26 23:37:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:37:03,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-10-26 23:37:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:03,781 INFO L225 Difference]: With dead ends: 42592 [2020-10-26 23:37:03,781 INFO L226 Difference]: Without dead ends: 28210 [2020-10-26 23:37:03,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:37:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28210 states. [2020-10-26 23:37:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28210 to 25981. [2020-10-26 23:37:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25981 states. [2020-10-26 23:37:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 34070 transitions. [2020-10-26 23:37:04,660 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 34070 transitions. Word has length 368 [2020-10-26 23:37:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:04,660 INFO L481 AbstractCegarLoop]: Abstraction has 25981 states and 34070 transitions. [2020-10-26 23:37:04,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:37:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 34070 transitions. [2020-10-26 23:37:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-10-26 23:37:04,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:04,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:04,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:37:04,670 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -864655214, now seen corresponding path program 1 times [2020-10-26 23:37:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:04,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339147205] [2020-10-26 23:37:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:04,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:08,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:09,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:09,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 404 [2020-10-26 23:37:09,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:37:09,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 23:37:09,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:37:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 285 [2020-10-26 23:37:09,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:09,963 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:37:09,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:09,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:09,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:09,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:09,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:37:09,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:09,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:37:09,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:09,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:37:09,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:10,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:10,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:37:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:10,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:37:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:10,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:10,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:10,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:37:10,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:37:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-26 23:37:10,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:37:10,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:37:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:11,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:11,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:37:11,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 257 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 23:37:11,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339147205] [2020-10-26 23:37:11,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:11,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:37:11,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066078735] [2020-10-26 23:37:11,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:37:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:37:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:37:11,357 INFO L87 Difference]: Start difference. First operand 25981 states and 34070 transitions. Second operand 8 states. [2020-10-26 23:37:12,728 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:37:15,794 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:37:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:34,434 INFO L93 Difference]: Finished difference Result 62376 states and 85312 transitions. [2020-10-26 23:37:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:37:34,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 388 [2020-10-26 23:37:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:34,572 INFO L225 Difference]: With dead ends: 62376 [2020-10-26 23:37:34,572 INFO L226 Difference]: Without dead ends: 33831 [2020-10-26 23:37:34,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:37:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33831 states. [2020-10-26 23:37:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33831 to 27161. [2020-10-26 23:37:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27161 states. [2020-10-26 23:37:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27161 states to 27161 states and 34253 transitions. [2020-10-26 23:37:35,627 INFO L78 Accepts]: Start accepts. Automaton has 27161 states and 34253 transitions. Word has length 388 [2020-10-26 23:37:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:35,628 INFO L481 AbstractCegarLoop]: Abstraction has 27161 states and 34253 transitions. [2020-10-26 23:37:35,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:37:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 27161 states and 34253 transitions. [2020-10-26 23:37:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-10-26 23:37:35,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:35,650 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:35,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:37:35,651 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash 355362250, now seen corresponding path program 1 times [2020-10-26 23:37:35,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:35,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372106749] [2020-10-26 23:37:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:36,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:38,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking...