/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=DEEPEST --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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:04:52,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:04:52,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:04:52,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:04:52,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:04:52,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:04:52,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:04:53,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:04:53,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:04:53,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:04:53,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:04:53,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:04:53,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:04:53,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:04:53,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:04:53,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:04:53,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:04:53,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:04:53,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:04:53,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:04:53,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:04:53,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:04:53,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:04:53,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:04:53,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:04:53,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:04:53,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:04:53,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:04:53,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:04:53,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:04:53,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:04:53,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:04:53,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:04:53,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:04:53,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:04:53,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:04:53,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:04:53,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:04:53,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:04:53,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:04:53,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:04:53,065 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 [2020-10-27 16:04:53,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:04:53,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:04:53,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:04:53,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:04:53,105 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:04:53,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:04:53,105 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:04:53,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:04:53,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:04:53,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:04:53,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:04:53,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:04:53,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:04:53,107 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:04:53,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:04:53,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:04:53,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:04:53,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:04:53,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:04:53,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:04:53,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:04:53,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:04:53,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:04:53,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:04:53,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:04:53,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:04:53,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:04:53,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:04:53,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:04:53,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:04:53,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:04:53,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:04:53,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:04:53,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:04:53,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:04:53,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label55.c [2020-10-27 16:04:53,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2a632614/3ca4dbc7e38246fa96900d9eff486463/FLAGb1e9d5ead [2020-10-27 16:04:54,648 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:04:54,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label55.c [2020-10-27 16:04:54,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2a632614/3ca4dbc7e38246fa96900d9eff486463/FLAGb1e9d5ead [2020-10-27 16:04:55,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2a632614/3ca4dbc7e38246fa96900d9eff486463 [2020-10-27 16:04:55,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:04:55,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:04:55,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:04:55,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:04:55,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:04:55,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:04:55" (1/1) ... [2020-10-27 16:04:55,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0f579a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:55, skipping insertion in model container [2020-10-27 16:04:55,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:04:55" (1/1) ... [2020-10-27 16:04:55,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:04:55,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:04:57,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:04:57,054 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:04:57,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:04:57,859 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:04:57,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57 WrapperNode [2020-10-27 16:04:57,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:04:57,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:04:57,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:04:57,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:04:57,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:57,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:57,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:57,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:58,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:58,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:58,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (1/1) ... [2020-10-27 16:04:58,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:04:58,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:04:58,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:04:58,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:04:58,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (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 [2020-10-27 16:04:58,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:04:58,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:04:58,299 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:04:58,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:04:58,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:04:58,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:04:58,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:04:58,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:04:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:04:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:04:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:04:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:04:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:04:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:04:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:04:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:04:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:04:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:04:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:04:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:04:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:04:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:04:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:04:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:04:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:05:05,244 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:05:05,245 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:05:05,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:05:05 BoogieIcfgContainer [2020-10-27 16:05:05,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:05:05,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:05:05,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:05:05,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:05:05,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:04:55" (1/3) ... [2020-10-27 16:05:05,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cf0fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:05:05, skipping insertion in model container [2020-10-27 16:05:05,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:04:57" (2/3) ... [2020-10-27 16:05:05,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cf0fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:05:05, skipping insertion in model container [2020-10-27 16:05:05,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:05:05" (3/3) ... [2020-10-27 16:05:05,262 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label55.c [2020-10-27 16:05:05,274 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:05:05,280 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:05:05,293 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:05:05,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:05:05,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:05:05,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:05:05,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:05:05,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:05:05,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:05:05,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:05:05,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:05:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 16:05:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2020-10-27 16:05:05,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:05:05,440 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] [2020-10-27 16:05:05,440 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:05:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:05:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1513128040, now seen corresponding path program 1 times [2020-10-27 16:05:05,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:05:05,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184908700] [2020-10-27 16:05:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:05:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:06,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:11,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:11,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 803 [2020-10-27 16:05:11,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-27 16:05:11,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:11,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:05:11,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:05:11,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 794 [2020-10-27 16:05:11,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:05:12,187 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:05:12,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:05:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:12,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:12,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:05:12,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:12,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 16:05:12,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:05:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:05:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:05:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:05:13,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184908700] [2020-10-27 16:05:13,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:05:13,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:05:13,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554280764] [2020-10-27 16:05:13,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:05:13,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:05:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:05:13,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:05:13,122 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-27 16:05:13,369 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:05:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:05:27,754 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-27 16:05:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:05:27,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 787 [2020-10-27 16:05:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:05:27,799 INFO L225 Difference]: With dead ends: 2677 [2020-10-27 16:05:27,799 INFO L226 Difference]: Without dead ends: 1703 [2020-10-27 16:05:27,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:05:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-27 16:05:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-27 16:05:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-27 16:05:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3006 transitions. [2020-10-27 16:05:28,004 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3006 transitions. Word has length 787 [2020-10-27 16:05:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:05:28,007 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 3006 transitions. [2020-10-27 16:05:28,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:05:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3006 transitions. [2020-10-27 16:05:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2020-10-27 16:05:28,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:05:28,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:05:28,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:05:28,045 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:05:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:05:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -950410122, now seen corresponding path program 1 times [2020-10-27 16:05:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:05:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617399577] [2020-10-27 16:05:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:05:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:28,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:29,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:30,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:33,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:33,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 813 [2020-10-27 16:05:33,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:05:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-27 16:05:33,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:33,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:05:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:05:33,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 786 [2020-10-27 16:05:33,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 16:05:35,090 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:05:35,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:05:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:35,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:35,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:05:35,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:35,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:05:35,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:05:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:05:35,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:05:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:35,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:35,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:05:35,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:35,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:05:35,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:05:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:35,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:05:35,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:05:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617399577] [2020-10-27 16:05:41,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:05:41,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:05:41,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692615923] [2020-10-27 16:05:41,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:05:41,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:05:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:05:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:05:41,207 INFO L87 Difference]: Start difference. First operand 1690 states and 3006 transitions. Second operand 5 states. [2020-10-27 16:05:41,733 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-27 16:05:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:05:58,996 INFO L93 Difference]: Finished difference Result 4173 states and 7578 transitions. [2020-10-27 16:05:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:05:59,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 795 [2020-10-27 16:05:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:05:59,013 INFO L225 Difference]: With dead ends: 4173 [2020-10-27 16:05:59,014 INFO L226 Difference]: Without dead ends: 1703 [2020-10-27 16:05:59,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:05:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-27 16:05:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-27 16:05:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-27 16:05:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2135 transitions. [2020-10-27 16:05:59,075 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2135 transitions. Word has length 795 [2020-10-27 16:05:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:05:59,076 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 2135 transitions. [2020-10-27 16:05:59,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:05:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2135 transitions. [2020-10-27 16:05:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-10-27 16:05:59,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:05:59,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:05:59,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:05:59,087 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:05:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:05:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1521588065, now seen corresponding path program 1 times [2020-10-27 16:05:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:05:59,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856527964] [2020-10-27 16:05:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:05:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:04,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:04,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 836 [2020-10-27 16:06:04,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:06:04,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5157 [2020-10-27 16:06:04,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:06:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 16:06:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 516 [2020-10-27 16:06:04,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:06:05,593 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-27 16:06:05,774 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-27 16:06:05,974 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-27 16:06:06,130 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-27 16:06:06,497 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-27 16:06:06,724 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-27 16:06:06,919 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-27 16:06:07,094 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-10-27 16:06:07,368 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-27 16:06:07,518 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-10-27 16:06:07,748 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:06:07,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:06:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:07,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:07,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:06:07,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:07,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:06:07,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:07,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:06:07,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:07,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:06:07,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:07,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:06:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:07,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:07,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 16:06:07,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:07,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 16:06:07,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:07,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:06:07,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:07,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 16:06:07,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:06:12,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856527964] [2020-10-27 16:06:12,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:06:12,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 16:06:12,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815121815] [2020-10-27 16:06:12,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 16:06:12,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:06:12,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 16:06:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 16:06:12,128 INFO L87 Difference]: Start difference. First operand 1690 states and 2135 transitions. Second operand 17 states. [2020-10-27 16:06:12,855 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 16:06:13,265 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:06:15,398 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 16:06:18,964 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:06:19,439 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 16:06:21,614 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 16:06:22,222 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 16:06:23,875 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 16:06:26,142 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:06:26,536 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 16:06:27,445 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 16:06:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:06:30,436 INFO L93 Difference]: Finished difference Result 3896 states and 4973 transitions. [2020-10-27 16:06:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 16:06:30,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 818 [2020-10-27 16:06:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:06:30,449 INFO L225 Difference]: With dead ends: 3896 [2020-10-27 16:06:30,449 INFO L226 Difference]: Without dead ends: 2013 [2020-10-27 16:06:30,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-27 16:06:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-10-27 16:06:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 2009. [2020-10-27 16:06:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2020-10-27 16:06:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2460 transitions. [2020-10-27 16:06:30,518 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2460 transitions. Word has length 818 [2020-10-27 16:06:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:06:30,520 INFO L481 AbstractCegarLoop]: Abstraction has 2009 states and 2460 transitions. [2020-10-27 16:06:30,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 16:06:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2460 transitions. [2020-10-27 16:06:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2020-10-27 16:06:30,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:06:30,532 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:06:30,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:06:30,532 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:06:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:06:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 145120962, now seen corresponding path program 1 times [2020-10-27 16:06:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:06:30,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090714469] [2020-10-27 16:06:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:06:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:31,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:33,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:35,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:35,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 867 [2020-10-27 16:06:35,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:06:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-27 16:06:35,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:06:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 16:06:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 791 [2020-10-27 16:06:35,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:36,355 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:06:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:06:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:36,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:36,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:36,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:06:36,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:06:36,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:06:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:06:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:36,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:06:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:36,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:36,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 16:06:36,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:36,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 16:06:36,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:36,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:06:36,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:36,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 16:06:36,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:06:37,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090714469] [2020-10-27 16:06:37,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:06:37,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:06:37,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856489701] [2020-10-27 16:06:37,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:06:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:06:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:06:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:06:37,353 INFO L87 Difference]: Start difference. First operand 2009 states and 2460 transitions. Second operand 6 states. [2020-10-27 16:06:37,774 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:06:38,221 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 16:06:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:06:54,746 INFO L93 Difference]: Finished difference Result 7397 states and 9358 transitions. [2020-10-27 16:06:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:06:54,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 849 [2020-10-27 16:06:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:06:54,773 INFO L225 Difference]: With dead ends: 7397 [2020-10-27 16:06:54,773 INFO L226 Difference]: Without dead ends: 5394 [2020-10-27 16:06:54,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:06:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2020-10-27 16:06:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 5386. [2020-10-27 16:06:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5386 states. [2020-10-27 16:06:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 6286 transitions. [2020-10-27 16:06:54,972 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 6286 transitions. Word has length 849 [2020-10-27 16:06:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:06:54,974 INFO L481 AbstractCegarLoop]: Abstraction has 5386 states and 6286 transitions. [2020-10-27 16:06:54,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:06:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 6286 transitions. [2020-10-27 16:06:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2020-10-27 16:06:54,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:06:54,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:06:54,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:06:54,997 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:06:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:06:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash -786975917, now seen corresponding path program 1 times [2020-10-27 16:06:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:06:54,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766573248] [2020-10-27 16:06:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:06:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:00,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 878 [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:07:00,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 16:07:00,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:00,476 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:07:00,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:07:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:00,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:00,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:07:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:00,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:07:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:00,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:00,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 16:07:00,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 16:07:00,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:07:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:07:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 16:07:00,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:07:01,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766573248] [2020-10-27 16:07:01,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:07:01,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 16:07:01,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585989158] [2020-10-27 16:07:01,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:07:01,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:07:01,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:07:01,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:07:01,017 INFO L87 Difference]: Start difference. First operand 5386 states and 6286 transitions. Second operand 7 states. [2020-10-27 16:07:01,269 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:07:07,948 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:07:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:07:13,716 INFO L93 Difference]: Finished difference Result 13468 states and 16075 transitions. [2020-10-27 16:07:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 16:07:13,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 860 [2020-10-27 16:07:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:07:13,753 INFO L225 Difference]: With dead ends: 13468 [2020-10-27 16:07:13,753 INFO L226 Difference]: Without dead ends: 8088 [2020-10-27 16:07:13,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:07:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8088 states. [2020-10-27 16:07:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8088 to 8033. [2020-10-27 16:07:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8033 states. [2020-10-27 16:07:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8033 states to 8033 states and 9235 transitions. [2020-10-27 16:07:13,983 INFO L78 Accepts]: Start accepts. Automaton has 8033 states and 9235 transitions. Word has length 860 [2020-10-27 16:07:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:07:13,984 INFO L481 AbstractCegarLoop]: Abstraction has 8033 states and 9235 transitions. [2020-10-27 16:07:13,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:07:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8033 states and 9235 transitions. [2020-10-27 16:07:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2020-10-27 16:07:14,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:07:14,019 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:07:14,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:07:14,020 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:07:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:07:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash 136230020, now seen corresponding path program 1 times [2020-10-27 16:07:14,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:07:14,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34306992] [2020-10-27 16:07:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:07:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:14,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:14,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:19,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:19,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 899 [2020-10-27 16:07:19,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:07:19,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-27 16:07:19,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:19,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:07:19,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-27 16:07:19,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 791 [2020-10-27 16:07:19,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:19,864 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:07:19,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:07:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:19,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:19,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:19,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:07:19,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:19,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:07:19,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:07:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:07:19,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:07:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:19,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:07:19,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:19,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 16:07:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:19,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:20,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:20,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 16:07:20,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 16:07:20,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:20,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:07:20,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:20,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 16:07:20,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 16:07:20,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34306992] [2020-10-27 16:07:20,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:07:20,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:07:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579367472] [2020-10-27 16:07:20,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:07:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:07:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:07:20,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:07:20,758 INFO L87 Difference]: Start difference. First operand 8033 states and 9235 transitions. Second operand 5 states. [2020-10-27 16:07:21,298 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:07:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:07:32,816 INFO L93 Difference]: Finished difference Result 23721 states and 27806 transitions. [2020-10-27 16:07:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:07:32,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 879 [2020-10-27 16:07:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:07:32,881 INFO L225 Difference]: With dead ends: 23721 [2020-10-27 16:07:32,881 INFO L226 Difference]: Without dead ends: 15694 [2020-10-27 16:07:32,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:07:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15694 states. [2020-10-27 16:07:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15694 to 15690. [2020-10-27 16:07:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15690 states. [2020-10-27 16:07:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15690 states to 15690 states and 17678 transitions. [2020-10-27 16:07:33,247 INFO L78 Accepts]: Start accepts. Automaton has 15690 states and 17678 transitions. Word has length 879 [2020-10-27 16:07:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:07:33,248 INFO L481 AbstractCegarLoop]: Abstraction has 15690 states and 17678 transitions. [2020-10-27 16:07:33,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:07:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15690 states and 17678 transitions. [2020-10-27 16:07:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2020-10-27 16:07:33,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:07:33,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:07:33,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:07:33,299 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:07:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:07:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash 406953935, now seen corresponding path program 1 times [2020-10-27 16:07:33,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:07:33,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789123553] [2020-10-27 16:07:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:07:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:38,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:38,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 924 [2020-10-27 16:07:38,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:07:38,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 16:07:38,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 16:07:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 16:07:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 762 [2020-10-27 16:07:38,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:39,558 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 16:07:39,748 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 16:07:39,949 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 16:07:40,125 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-27 16:07:40,310 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 16:07:40,499 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 16:07:40,674 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 16:07:40,897 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-27 16:07:41,783 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:07:41,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:07:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:41,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:41,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:07:41,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:07:41,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:07:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:41,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:07:41,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:41,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:07:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:41,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:41,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:41,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 16:07:41,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 115 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:07:47,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789123553] [2020-10-27 16:07:47,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:07:47,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 16:07:47,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534059273] [2020-10-27 16:07:47,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 16:07:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:07:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 16:07:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 16:07:47,995 INFO L87 Difference]: Start difference. First operand 15690 states and 17678 transitions. Second operand 19 states. [2020-10-27 16:07:49,885 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 16:07:50,320 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 16:07:56,066 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 16:07:58,348 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:07:58,822 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 16:07:59,218 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 16:08:01,500 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2020-10-27 16:08:03,437 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-10-27 16:08:07,640 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 16:08:08,456 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-27 16:08:15,625 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-27 16:08:16,907 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 16:08:17,298 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 16:08:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:08:19,273 INFO L93 Difference]: Finished difference Result 32166 states and 36467 transitions. [2020-10-27 16:08:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 16:08:19,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 906 [2020-10-27 16:08:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:08:19,316 INFO L225 Difference]: With dead ends: 32166 [2020-10-27 16:08:19,317 INFO L226 Difference]: Without dead ends: 16482 [2020-10-27 16:08:19,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-10-27 16:08:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2020-10-27 16:08:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 16472. [2020-10-27 16:08:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16472 states. [2020-10-27 16:08:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16472 states to 16472 states and 18489 transitions. [2020-10-27 16:08:19,656 INFO L78 Accepts]: Start accepts. Automaton has 16472 states and 18489 transitions. Word has length 906 [2020-10-27 16:08:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:08:19,658 INFO L481 AbstractCegarLoop]: Abstraction has 16472 states and 18489 transitions. [2020-10-27 16:08:19,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 16:08:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16472 states and 18489 transitions. [2020-10-27 16:08:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2020-10-27 16:08:19,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:08:19,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:08:19,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 16:08:19,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:08:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:08:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2139766149, now seen corresponding path program 1 times [2020-10-27 16:08:19,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:08:19,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249965868] [2020-10-27 16:08:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:08:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:19,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:21,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:24,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:24,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 930 [2020-10-27 16:08:24,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:08:24,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 16:08:24,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:08:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-27 16:08:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 791 [2020-10-27 16:08:24,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:25,385 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:08:25,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:08:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:25,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:25,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:08:25,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:25,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:08:25,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:08:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:08:25,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:25,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:08:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:25,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:25,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 16:08:25,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 16:08:25,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:08:25,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:25,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 16:08:25,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:08:26,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249965868] [2020-10-27 16:08:26,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:08:26,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:08:26,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557934832] [2020-10-27 16:08:26,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:08:26,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:08:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:08:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:08:26,288 INFO L87 Difference]: Start difference. First operand 16472 states and 18489 transitions. Second operand 5 states. [2020-10-27 16:08:26,708 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:08:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:08:38,951 INFO L93 Difference]: Finished difference Result 48193 states and 55300 transitions. [2020-10-27 16:08:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:08:38,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 912 [2020-10-27 16:08:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:08:39,041 INFO L225 Difference]: With dead ends: 48193 [2020-10-27 16:08:39,041 INFO L226 Difference]: Without dead ends: 31727 [2020-10-27 16:08:39,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:08:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31727 states. [2020-10-27 16:08:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31727 to 31723. [2020-10-27 16:08:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31723 states. [2020-10-27 16:08:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31723 states to 31723 states and 36088 transitions. [2020-10-27 16:08:39,667 INFO L78 Accepts]: Start accepts. Automaton has 31723 states and 36088 transitions. Word has length 912 [2020-10-27 16:08:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:08:39,668 INFO L481 AbstractCegarLoop]: Abstraction has 31723 states and 36088 transitions. [2020-10-27 16:08:39,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:08:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31723 states and 36088 transitions. [2020-10-27 16:08:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1055 [2020-10-27 16:08:39,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:08:39,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:08:39,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 16:08:39,756 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:08:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:08:39,757 INFO L82 PathProgramCache]: Analyzing trace with hash 527938195, now seen corresponding path program 1 times [2020-10-27 16:08:39,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:08:39,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457465138] [2020-10-27 16:08:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY