/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem04_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 05:06:19,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 05:06:19,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 05:06:19,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 05:06:19,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 05:06:19,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 05:06:19,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 05:06:19,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 05:06:19,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 05:06:19,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 05:06:19,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 05:06:19,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 05:06:19,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 05:06:19,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 05:06:19,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 05:06:19,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 05:06:19,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 05:06:19,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 05:06:19,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 05:06:19,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 05:06:19,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 05:06:19,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 05:06:19,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 05:06:19,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 05:06:19,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 05:06:19,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 05:06:19,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 05:06:19,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 05:06:19,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 05:06:19,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 05:06:19,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 05:06:19,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 05:06:19,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 05:06:19,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 05:06:19,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 05:06:19,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 05:06:19,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 05:06:19,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 05:06:19,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 05:06:19,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 05:06:19,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 05:06:19,461 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 [2020-10-29 05:06:19,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 05:06:19,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 05:06:19,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 05:06:19,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 05:06:19,520 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 05:06:19,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 05:06:19,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 05:06:19,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 05:06:19,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 05:06:19,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 05:06:19,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 05:06:19,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 05:06:19,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 05:06:19,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 05:06:19,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 05:06:19,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 05:06:19,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 05:06:19,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 05:06:19,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 05:06:19,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 05:06:19,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 05:06:19,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 05:06:19,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 05:06:19,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 05:06:19,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 05:06:19,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 05:06:19,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 05:06:19,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 05:06:19,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 05:06:19,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 05:06:19,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 05:06:19,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 05:06:19,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 05:06:19,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 05:06:19,978 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 05:06:19,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label15.c [2020-10-29 05:06:20,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc40b202a/7c3eb590d7b8469cb05b32c428ca95be/FLAGd5f504dd8 [2020-10-29 05:06:21,137 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 05:06:21,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label15.c [2020-10-29 05:06:21,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc40b202a/7c3eb590d7b8469cb05b32c428ca95be/FLAGd5f504dd8 [2020-10-29 05:06:21,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc40b202a/7c3eb590d7b8469cb05b32c428ca95be [2020-10-29 05:06:21,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 05:06:21,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 05:06:21,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 05:06:21,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 05:06:21,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 05:06:21,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:06:21" (1/1) ... [2020-10-29 05:06:21,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78262a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:21, skipping insertion in model container [2020-10-29 05:06:21,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:06:21" (1/1) ... [2020-10-29 05:06:21,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 05:06:21,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 05:06:23,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 05:06:23,206 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 05:06:23,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 05:06:23,980 INFO L208 MainTranslator]: Completed translation [2020-10-29 05:06:23,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23 WrapperNode [2020-10-29 05:06:23,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 05:06:23,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 05:06:23,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 05:06:23,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 05:06:24,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (1/1) ... [2020-10-29 05:06:24,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 05:06:24,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 05:06:24,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 05:06:24,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 05:06:24,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (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 [2020-10-29 05:06:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 05:06:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 05:06:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 05:06:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 05:06:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 05:06:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 05:06:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 05:06:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 05:06:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 05:06:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 05:06:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 05:06:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 05:06:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 05:06:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 05:06:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 05:06:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 05:06:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 05:06:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 05:06:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 05:06:31,987 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 05:06:31,989 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 05:06:31,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:06:31 BoogieIcfgContainer [2020-10-29 05:06:31,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 05:06:31,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 05:06:31,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 05:06:31,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 05:06:31,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:06:21" (1/3) ... [2020-10-29 05:06:31,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddc91d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:06:31, skipping insertion in model container [2020-10-29 05:06:32,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:23" (2/3) ... [2020-10-29 05:06:32,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddc91d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:06:32, skipping insertion in model container [2020-10-29 05:06:32,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:06:31" (3/3) ... [2020-10-29 05:06:32,002 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label15.c [2020-10-29 05:06:32,014 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 05:06:32,021 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 05:06:32,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 05:06:32,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 05:06:32,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 05:06:32,070 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 05:06:32,070 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 05:06:32,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 05:06:32,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 05:06:32,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 05:06:32,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 05:06:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-29 05:06:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2020-10-29 05:06:32,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:06:32,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:06:32,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:06:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:06:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash -222829388, now seen corresponding path program 1 times [2020-10-29 05:06:32,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:06:32,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145766509] [2020-10-29 05:06:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:06:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:06:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:06:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:06:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:06:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 808 [2020-10-29 05:06:38,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 05:06:38,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5322 [2020-10-29 05:06:38,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:06:38,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:06:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 05:06:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 05:06:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 799 [2020-10-29 05:06:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 05:06:39,560 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:06:39,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:06:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:06:39,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:06:39,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:06:39,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:06:39,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:06:39,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 05:06:39,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:06:39,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:06:39,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:06:39,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:06:39,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 05:06:39,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 05:06:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 05:06:40,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145766509] [2020-10-29 05:06:40,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 05:06:40,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 05:06:40,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025514338] [2020-10-29 05:06:40,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 05:06:40,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:06:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 05:06:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 05:06:40,932 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-29 05:06:41,163 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:06:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 05:06:58,097 INFO L93 Difference]: Finished difference Result 2677 states and 5144 transitions. [2020-10-29 05:06:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 05:06:58,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 792 [2020-10-29 05:06:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 05:06:58,137 INFO L225 Difference]: With dead ends: 2677 [2020-10-29 05:06:58,137 INFO L226 Difference]: Without dead ends: 1703 [2020-10-29 05:06:58,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 05:06:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-29 05:06:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1688. [2020-10-29 05:06:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-10-29 05:06:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 3016 transitions. [2020-10-29 05:06:58,361 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 3016 transitions. Word has length 792 [2020-10-29 05:06:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 05:06:58,363 INFO L481 AbstractCegarLoop]: Abstraction has 1688 states and 3016 transitions. [2020-10-29 05:06:58,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 05:06:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 3016 transitions. [2020-10-29 05:06:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2020-10-29 05:06:58,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:06:58,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:06:58,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 05:06:58,394 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:06:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:06:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1175507355, now seen corresponding path program 1 times [2020-10-29 05:06:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:06:58,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309051569] [2020-10-29 05:06:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:06:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:06:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:06:59,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:03,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:03,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 829 [2020-10-29 05:07:03,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 05:07:03,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 05:07:03,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:03,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:03,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 05:07:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 05:07:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 796 [2020-10-29 05:07:03,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 05:07:04,273 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:07:04,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:07:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:04,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:04,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:04,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:07:04,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:04,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 05:07:04,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:04,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 05:07:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:07:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 05:07:04,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 05:07:04,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 05:07:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:04,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:04,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 05:07:04,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:04,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 05:07:04,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:04,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:04,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:07:04,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:07:04,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 05:07:04,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 05:07:04,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309051569] [2020-10-29 05:07:04,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 05:07:04,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 05:07:04,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083756085] [2020-10-29 05:07:05,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 05:07:05,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:07:05,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 05:07:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 05:07:05,002 INFO L87 Difference]: Start difference. First operand 1688 states and 3016 transitions. Second operand 5 states. [2020-10-29 05:07:05,271 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:07:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 05:07:21,422 INFO L93 Difference]: Finished difference Result 5075 states and 9133 transitions. [2020-10-29 05:07:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 05:07:21,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 811 [2020-10-29 05:07:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 05:07:21,448 INFO L225 Difference]: With dead ends: 5075 [2020-10-29 05:07:21,448 INFO L226 Difference]: Without dead ends: 3393 [2020-10-29 05:07:21,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 05:07:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2020-10-29 05:07:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 3378. [2020-10-29 05:07:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2020-10-29 05:07:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 5691 transitions. [2020-10-29 05:07:21,568 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 5691 transitions. Word has length 811 [2020-10-29 05:07:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 05:07:21,570 INFO L481 AbstractCegarLoop]: Abstraction has 3378 states and 5691 transitions. [2020-10-29 05:07:21,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 05:07:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 5691 transitions. [2020-10-29 05:07:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2020-10-29 05:07:21,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:07:21,649 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:07:21,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 05:07:21,649 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:07:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:07:21,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1234453505, now seen corresponding path program 1 times [2020-10-29 05:07:21,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:07:21,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326164661] [2020-10-29 05:07:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:07:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:23,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:23,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 831 [2020-10-29 05:07:23,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:23,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-29 05:07:23,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:23,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 05:07:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 05:07:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 05:07:23,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:23,502 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:07:23,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:07:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:23,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:23,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:23,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:07:23,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 05:07:23,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:23,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:07:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:07:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 05:07:23,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:23,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 05:07:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:23,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:23,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:23,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 05:07:23,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:23,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 05:07:23,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:23,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:23,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 05:07:23,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 05:07:23,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 05:07:23,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 05:07:24,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326164661] [2020-10-29 05:07:24,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 05:07:24,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 05:07:24,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261928850] [2020-10-29 05:07:24,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 05:07:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:07:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 05:07:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 05:07:24,273 INFO L87 Difference]: Start difference. First operand 3378 states and 5691 transitions. Second operand 7 states. [2020-10-29 05:07:24,507 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:07:28,990 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:07:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 05:07:46,052 INFO L93 Difference]: Finished difference Result 10291 states and 17614 transitions. [2020-10-29 05:07:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 05:07:46,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 813 [2020-10-29 05:07:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 05:07:46,095 INFO L225 Difference]: With dead ends: 10291 [2020-10-29 05:07:46,096 INFO L226 Difference]: Without dead ends: 6919 [2020-10-29 05:07:46,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 05:07:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2020-10-29 05:07:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6855. [2020-10-29 05:07:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6855 states. [2020-10-29 05:07:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10282 transitions. [2020-10-29 05:07:46,328 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10282 transitions. Word has length 813 [2020-10-29 05:07:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 05:07:46,329 INFO L481 AbstractCegarLoop]: Abstraction has 6855 states and 10282 transitions. [2020-10-29 05:07:46,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 05:07:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10282 transitions. [2020-10-29 05:07:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2020-10-29 05:07:46,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:07:46,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:07:46,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 05:07:46,356 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:07:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:07:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2049913421, now seen corresponding path program 1 times [2020-10-29 05:07:46,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:07:46,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523587612] [2020-10-29 05:07:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:07:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:51,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:51,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 923 [2020-10-29 05:07:51,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 05:07:51,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-29 05:07:51,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:51,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:51,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 05:07:51,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 05:07:51,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 05:07:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:51,947 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:07:51,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:07:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:51,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:51,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:07:51,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 05:07:51,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:51,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:51,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:07:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:07:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 05:07:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 05:07:52,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 05:07:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:52,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:52,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:52,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 05:07:52,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 05:07:52,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 05:07:52,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:52,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:52,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:07:52,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:07:52,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 05:07:52,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 05:07:52,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 05:07:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:52,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:52,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:52,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 05:07:52,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-29 05:07:52,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:52,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 05:07:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 05:07:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 05:07:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-29 05:07:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:07:52,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:07:52,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:07:52,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 05:07:52,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:07:52,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 05:07:52,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:07:52,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:07:52,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 05:07:52,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 05:07:52,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 05:07:52,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:07:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 124 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 05:07:52,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523587612] [2020-10-29 05:07:52,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 05:07:52,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 05:07:52,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474822385] [2020-10-29 05:07:52,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 05:07:52,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:07:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 05:07:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 05:07:52,989 INFO L87 Difference]: Start difference. First operand 6855 states and 10282 transitions. Second operand 8 states. [2020-10-29 05:07:53,244 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:07:58,492 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:08:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 05:08:15,090 INFO L93 Difference]: Finished difference Result 20714 states and 32235 transitions. [2020-10-29 05:08:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 05:08:15,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 901 [2020-10-29 05:08:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 05:08:15,163 INFO L225 Difference]: With dead ends: 20714 [2020-10-29 05:08:15,163 INFO L226 Difference]: Without dead ends: 13865 [2020-10-29 05:08:15,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 05:08:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13865 states. [2020-10-29 05:08:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13865 to 13766. [2020-10-29 05:08:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13766 states. [2020-10-29 05:08:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13766 states to 13766 states and 20469 transitions. [2020-10-29 05:08:15,701 INFO L78 Accepts]: Start accepts. Automaton has 13766 states and 20469 transitions. Word has length 901 [2020-10-29 05:08:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 05:08:15,701 INFO L481 AbstractCegarLoop]: Abstraction has 13766 states and 20469 transitions. [2020-10-29 05:08:15,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 05:08:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 13766 states and 20469 transitions. [2020-10-29 05:08:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2020-10-29 05:08:15,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:08:15,755 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:08:15,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 05:08:15,755 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:08:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:08:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1522144787, now seen corresponding path program 1 times [2020-10-29 05:08:15,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:08:15,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708660625] [2020-10-29 05:08:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:08:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:18,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:20,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:20,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-10-29 05:08:20,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 05:08:20,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 05:08:20,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:20,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 05:08:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 05:08:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 05:08:20,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:21,170 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:08:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:08:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:21,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:08:21,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:08:21,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 05:08:21,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:21,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 05:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 05:08:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:21,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 05:08:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:21,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:21,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:21,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 05:08:21,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:08:21,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 05:08:21,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:21,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:21,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:08:21,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:08:21,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 05:08:21,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 05:08:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:21,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:21,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:21,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:21,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 05:08:21,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 05:08:21,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-29 05:08:21,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:21,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:08:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:08:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 05:08:21,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:21,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-29 05:08:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:21,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:21,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 05:08:21,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:08:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 05:08:21,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:21,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 05:08:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 05:08:21,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 05:08:21,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 138 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 05:08:22,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708660625] [2020-10-29 05:08:22,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 05:08:22,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 05:08:22,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019716011] [2020-10-29 05:08:22,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 05:08:22,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:08:22,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 05:08:22,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 05:08:22,259 INFO L87 Difference]: Start difference. First operand 13766 states and 20469 transitions. Second operand 7 states. [2020-10-29 05:08:22,516 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:08:35,454 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 05:08:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 05:08:42,249 INFO L93 Difference]: Finished difference Result 34636 states and 54614 transitions. [2020-10-29 05:08:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 05:08:42,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 905 [2020-10-29 05:08:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 05:08:42,357 INFO L225 Difference]: With dead ends: 34636 [2020-10-29 05:08:42,357 INFO L226 Difference]: Without dead ends: 20876 [2020-10-29 05:08:42,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 05:08:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20876 states. [2020-10-29 05:08:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20876 to 20651. [2020-10-29 05:08:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20651 states. [2020-10-29 05:08:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20651 states to 20651 states and 29699 transitions. [2020-10-29 05:08:43,036 INFO L78 Accepts]: Start accepts. Automaton has 20651 states and 29699 transitions. Word has length 905 [2020-10-29 05:08:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 05:08:43,037 INFO L481 AbstractCegarLoop]: Abstraction has 20651 states and 29699 transitions. [2020-10-29 05:08:43,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 05:08:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20651 states and 29699 transitions. [2020-10-29 05:08:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2020-10-29 05:08:43,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:08:43,109 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:08:43,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 05:08:43,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:08:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:08:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash -647386549, now seen corresponding path program 1 times [2020-10-29 05:08:43,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:08:43,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558709422] [2020-10-29 05:08:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:08:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:43,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:48,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:48,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 931 [2020-10-29 05:08:48,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 05:08:48,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 05:08:48,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:48,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 05:08:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-29 05:08:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 568 [2020-10-29 05:08:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:50,914 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-29 05:08:51,233 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-29 05:08:51,700 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2020-10-29 05:08:52,165 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2020-10-29 05:08:52,471 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-29 05:08:52,751 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-29 05:08:53,078 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-29 05:08:53,499 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2020-10-29 05:08:53,662 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 27 [2020-10-29 05:08:54,070 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:08:54,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:08:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:08:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 05:08:54,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:54,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 05:08:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:08:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 05:08:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 05:08:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:54,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:54,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 05:08:54,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:08:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 05:08:54,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:54,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 05:08:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:08:54,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 05:08:54,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:08:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 05:08:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:08:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:08:54,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:08:54,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 05:08:54,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:08:54,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-29 05:08:54,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:08:54,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:08:54,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:08:54,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:08:54,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 05:08:54,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:09:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 05:09:00,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558709422] [2020-10-29 05:09:00,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 05:09:00,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 05:09:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344910397] [2020-10-29 05:09:00,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 05:09:00,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:09:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 05:09:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-29 05:09:00,246 INFO L87 Difference]: Start difference. First operand 20651 states and 29699 transitions. Second operand 17 states. [2020-10-29 05:09:02,594 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 05:09:03,194 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 05:09:05,791 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 139 [2020-10-29 05:09:07,890 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 139 [2020-10-29 05:09:15,532 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 137 [2020-10-29 05:09:17,028 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 05:09:17,555 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 05:09:24,232 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2020-10-29 05:09:25,810 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 120 [2020-10-29 05:09:30,168 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-29 05:09:30,851 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-29 05:09:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 05:09:40,299 INFO L93 Difference]: Finished difference Result 41870 states and 60311 transitions. [2020-10-29 05:09:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 05:09:40,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 911 [2020-10-29 05:09:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 05:09:40,381 INFO L225 Difference]: With dead ends: 41870 [2020-10-29 05:09:40,381 INFO L226 Difference]: Without dead ends: 21225 [2020-10-29 05:09:40,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-29 05:09:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21225 states. [2020-10-29 05:09:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21225 to 21214. [2020-10-29 05:09:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21214 states. [2020-10-29 05:09:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21214 states to 21214 states and 30288 transitions. [2020-10-29 05:09:41,023 INFO L78 Accepts]: Start accepts. Automaton has 21214 states and 30288 transitions. Word has length 911 [2020-10-29 05:09:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 05:09:41,025 INFO L481 AbstractCegarLoop]: Abstraction has 21214 states and 30288 transitions. [2020-10-29 05:09:41,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 05:09:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 21214 states and 30288 transitions. [2020-10-29 05:09:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2020-10-29 05:09:41,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 05:09:41,100 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 05:09:41,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 05:09:41,101 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 05:09:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 05:09:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash 857402373, now seen corresponding path program 1 times [2020-10-29 05:09:41,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 05:09:41,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977391734] [2020-10-29 05:09:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 05:09:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:09:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:41,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:45,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:46,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:09:46,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 983 [2020-10-29 05:09:46,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 05:09:46,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 05:09:46,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:09:46,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:09:46,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 05:09:46,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 05:09:46,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-29 05:09:46,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:09:46,590 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 05:09:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 05:09:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:09:46,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:46,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:09:46,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 05:09:46,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:09:46,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 05:09:46,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:09:46,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:09:46,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 05:09:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 05:09:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 05:09:46,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 05:09:46,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 05:09:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:09:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:46,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:09:46,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 05:09:46,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 05:09:46,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 05:09:46,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:09:46,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:09:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 05:09:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 05:09:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 05:09:46,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:09:46,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 05:09:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:09:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:46,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-29 05:09:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:09:47,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-29 05:09:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 05:09:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 05:09:47,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 05:09:47,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 05:09:47,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 05:09:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 05:09:47,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 05:09:47,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 05:09:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 05:09:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 05:09:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 05:09:47,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 05:09:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 165 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 05:09:47,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977391734] [2020-10-29 05:09:47,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 05:09:47,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 05:09:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032627210] [2020-10-29 05:09:47,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 05:09:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 05:09:47,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 05:09:47,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 05:09:47,685 INFO L87 Difference]: Start difference. First operand 21214 states and 30288 transitions. Second operand 7 states. [2020-10-29 05:09:47,942 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-29 05:09:54,141 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 96